./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V --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 64bit --witnessprinter.graph.data.programhash d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:31:23,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:31:23,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:31:23,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:31:23,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:31:23,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:31:23,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:31:23,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:31:23,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:31:23,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:31:23,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:31:23,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:31:23,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:31:23,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:31:23,407 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:31:23,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:31:23,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:31:23,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:31:23,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:31:23,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:31:23,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:31:23,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:31:23,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:31:23,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:31:23,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:31:23,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:31:23,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:31:23,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:31:23,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:31:23,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:31:23,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:31:23,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:31:23,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:31:23,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:31:23,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:31:23,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:31:23,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:31:23,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:31:23,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:31:23,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:31:23,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:31:23,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:31:23,527 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:31:23,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:31:23,529 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:31:23,529 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:31:23,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:31:23,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:31:23,539 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:31:23,539 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:31:23,539 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:31:23,540 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:31:23,541 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:31:23,542 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:31:23,542 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:31:23,542 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:31:23,543 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:31:23,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:31:23,543 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:31:23,543 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:31:23,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:31:23,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:31:23,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:31:23,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:31:23,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:31:23,547 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:31:23,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:31:23,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:31:23,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:31:23,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:31:23,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:31:23,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:31:23,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:31:23,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:31:23,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:31:23,552 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:31:23,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:31:23,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:31:23,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:31:23,553 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:31:23,553 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_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d [2021-11-23 02:31:23,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:31:23,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:31:23,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:31:23,999 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:31:24,000 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:31:24,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-23 02:31:24,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/data/1ddb0eef6/0fc68416beda41379ca8617077ff9737/FLAGce9a4decd [2021-11-23 02:31:25,324 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:31:25,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-23 02:31:25,389 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/data/1ddb0eef6/0fc68416beda41379ca8617077ff9737/FLAGce9a4decd [2021-11-23 02:31:25,565 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/data/1ddb0eef6/0fc68416beda41379ca8617077ff9737 [2021-11-23 02:31:25,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:31:25,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:31:25,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:31:25,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:31:25,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:31:25,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:31:25" (1/1) ... [2021-11-23 02:31:25,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@684073d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:25, skipping insertion in model container [2021-11-23 02:31:25,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:31:25" (1/1) ... [2021-11-23 02:31:25,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:31:25,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:31:27,156 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2021-11-23 02:31:28,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:31:28,788 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:31:29,034 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2021-11-23 02:31:29,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:31:29,532 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:31:29,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29 WrapperNode [2021-11-23 02:31:29,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:31:29,534 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:31:29,535 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:31:29,535 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:31:29,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:29,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:29,924 INFO L137 Inliner]: procedures = 239, calls = 2983, calls flagged for inlining = 111, calls inlined = 96, statements flattened = 5266 [2021-11-23 02:31:29,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:31:29,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:31:29,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:31:29,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:31:29,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:29,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:29,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:29,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:30,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:30,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:30,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:30,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:31:30,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:31:30,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:31:30,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:31:30,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (1/1) ... [2021-11-23 02:31:30,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:31:30,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:30,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:31:30,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:31:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure at76_hw_scan [2021-11-23 02:31:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_hw_scan [2021-11-23 02:31:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure at76_dfu_get_status [2021-11-23 02:31:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_dfu_get_status [2021-11-23 02:31:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure at76_join [2021-11-23 02:31:30,456 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_join [2021-11-23 02:31:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-23 02:31:30,456 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-23 02:31:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:31:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:31:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:31:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:31:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2021-11-23 02:31:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2021-11-23 02:31:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure at76_submit_rx_urb [2021-11-23 02:31:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_submit_rx_urb [2021-11-23 02:31:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure at76_add_interface [2021-11-23 02:31:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_add_interface [2021-11-23 02:31:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_timeout [2021-11-23 02:31:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_timeout [2021-11-23 02:31:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:31:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:31:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-23 02:31:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-23 02:31:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure at76_bss_info_changed [2021-11-23 02:31:30,459 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_bss_info_changed [2021-11-23 02:31:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure at76_wait_completion [2021-11-23 02:31:30,459 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_wait_completion [2021-11-23 02:31:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:31:30,459 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:31:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-23 02:31:30,460 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-23 02:31:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:31:30,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:31:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:31:30,461 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:31:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:31:30,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:31:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:31:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 02:31:30,461 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 02:31:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:31:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-23 02:31:30,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-23 02:31:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure at76_delete_device [2021-11-23 02:31:30,462 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_delete_device [2021-11-23 02:31:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-23 02:31:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_mib [2021-11-23 02:31:30,463 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_mib [2021-11-23 02:31:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_radio [2021-11-23 02:31:30,465 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_radio [2021-11-23 02:31:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:31:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:31:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure led_trigger_event [2021-11-23 02:31:30,466 INFO L138 BoogieDeclarations]: Found implementation of procedure led_trigger_event [2021-11-23 02:31:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_card_command [2021-11-23 02:31:30,466 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_card_command [2021-11-23 02:31:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_cmd_status [2021-11-23 02:31:30,467 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_cmd_status [2021-11-23 02:31:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2021-11-23 02:31:30,468 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2021-11-23 02:31:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-23 02:31:30,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-23 02:31:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:31:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:31:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_queue_delayed_work [2021-11-23 02:31:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_queue_delayed_work [2021-11-23 02:31:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:31:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:31:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-23 02:31:30,470 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-23 02:31:30,470 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-23 02:31:30,470 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-23 02:31:30,470 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_mib [2021-11-23 02:31:30,470 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_mib [2021-11-23 02:31:30,470 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-23 02:31:30,471 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-23 02:31:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:31:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 02:31:30,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 02:31:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:31:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_pm_mode [2021-11-23 02:31:30,472 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_pm_mode [2021-11-23 02:31:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_key [2021-11-23 02:31:30,474 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_key [2021-11-23 02:31:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure at76_is_505a [2021-11-23 02:31:30,474 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_is_505a [2021-11-23 02:31:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:31:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_hw_cfg [2021-11-23 02:31:30,475 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_hw_cfg [2021-11-23 02:31:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure at76_config [2021-11-23 02:31:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_config [2021-11-23 02:31:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-23 02:31:30,477 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-23 02:31:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:31:30,477 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:31:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-23 02:31:30,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-23 02:31:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 02:31:30,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 02:31:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-11-23 02:31:30,478 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-11-23 02:31:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 02:31:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 02:31:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_op_mode [2021-11-23 02:31:30,481 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_op_mode [2021-11-23 02:31:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure at76_remove_interface [2021-11-23 02:31:30,481 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_remove_interface [2021-11-23 02:31:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2021-11-23 02:31:30,481 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2021-11-23 02:31:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:31:30,483 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:31:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:31:30,487 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:31:30,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:31:30,487 INFO L130 BoogieDeclarations]: Found specification of procedure wiphy_name [2021-11-23 02:31:30,488 INFO L138 BoogieDeclarations]: Found implementation of procedure wiphy_name [2021-11-23 02:31:30,490 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2021-11-23 02:31:30,491 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2021-11-23 02:31:30,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:31:30,491 INFO L130 BoogieDeclarations]: Found specification of procedure at76_start_monitor [2021-11-23 02:31:30,496 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_start_monitor [2021-11-23 02:31:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_stop_queues [2021-11-23 02:31:30,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_stop_queues [2021-11-23 02:31:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-23 02:31:30,497 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-23 02:31:30,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:31:30,497 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2021-11-23 02:31:30,497 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2021-11-23 02:31:30,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:31:30,497 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-23 02:31:30,497 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-23 02:31:30,497 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-11-23 02:31:30,498 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-11-23 02:31:30,498 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-23 02:31:30,498 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-23 02:31:30,498 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-23 02:31:30,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-23 02:31:30,498 INFO L130 BoogieDeclarations]: Found specification of procedure at76_configure_filter [2021-11-23 02:31:30,498 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_configure_filter [2021-11-23 02:31:30,499 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 02:31:30,499 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 02:31:30,499 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_queue_work [2021-11-23 02:31:30,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_queue_work [2021-11-23 02:31:30,499 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2021-11-23 02:31:30,499 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2021-11-23 02:31:30,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:31:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure at76_mac80211_tx [2021-11-23 02:31:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_mac80211_tx [2021-11-23 02:31:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:31:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:31:30,500 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2021-11-23 02:31:30,500 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2021-11-23 02:31:31,500 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:31:31,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:31:31,878 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:31:43,024 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:31:44,508 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:31:44,508 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:31:44,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:31:44 BoogieIcfgContainer [2021-11-23 02:31:44,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:31:44,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:31:44,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:31:44,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:31:44,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:31:25" (1/3) ... [2021-11-23 02:31:44,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3029c1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:31:44, skipping insertion in model container [2021-11-23 02:31:44,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:29" (2/3) ... [2021-11-23 02:31:44,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3029c1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:31:44, skipping insertion in model container [2021-11-23 02:31:44,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:31:44" (3/3) ... [2021-11-23 02:31:44,524 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2021-11-23 02:31:44,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:31:44,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:31:44,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:31:44,633 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 [2021-11-23 02:31:44,633 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:31:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 991 states, 626 states have (on average 1.351437699680511) internal successors, (846), 650 states have internal predecessors, (846), 296 states have call successors, (296), 68 states have call predecessors, (296), 67 states have return successors, (291), 290 states have call predecessors, (291), 291 states have call successors, (291) [2021-11-23 02:31:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 02:31:44,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:44,703 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:31:44,704 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -717879809, now seen corresponding path program 1 times [2021-11-23 02:31:44,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:44,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112080112] [2021-11-23 02:31:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:44,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-23 02:31:45,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:45,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112080112] [2021-11-23 02:31:45,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112080112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:45,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:45,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:31:45,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567112724] [2021-11-23 02:31:45,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:45,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:31:45,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:31:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:31:45,941 INFO L87 Difference]: Start difference. First operand has 991 states, 626 states have (on average 1.351437699680511) internal successors, (846), 650 states have internal predecessors, (846), 296 states have call successors, (296), 68 states have call predecessors, (296), 67 states have return successors, (291), 290 states have call predecessors, (291), 291 states have call successors, (291) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:31:51,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:51,814 INFO L93 Difference]: Finished difference Result 2903 states and 4211 transitions. [2021-11-23 02:31:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:31:51,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 70 [2021-11-23 02:31:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:51,875 INFO L225 Difference]: With dead ends: 2903 [2021-11-23 02:31:51,876 INFO L226 Difference]: Without dead ends: 1919 [2021-11-23 02:31:51,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:31:51,900 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 1358 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:51,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1358 Valid, 2790 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 338 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-11-23 02:31:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-11-23 02:31:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1916. [2021-11-23 02:31:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1219 states have (on average 1.3371616078753077) internal successors, (1630), 1253 states have internal predecessors, (1630), 564 states have call successors, (564), 133 states have call predecessors, (564), 132 states have return successors, (563), 561 states have call predecessors, (563), 563 states have call successors, (563) [2021-11-23 02:31:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2757 transitions. [2021-11-23 02:31:52,211 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2757 transitions. Word has length 70 [2021-11-23 02:31:52,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:52,212 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2757 transitions. [2021-11-23 02:31:52,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 02:31:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2757 transitions. [2021-11-23 02:31:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 02:31:52,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:52,223 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-23 02:31:52,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:31:52,224 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -415776491, now seen corresponding path program 1 times [2021-11-23 02:31:52,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:52,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885150346] [2021-11-23 02:31:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:52,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:31:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 02:31:52,784 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:31:52,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885150346] [2021-11-23 02:31:52,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885150346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:52,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:31:52,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:31:52,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747785375] [2021-11-23 02:31:52,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:52,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:31:52,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:31:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:31:52,795 INFO L87 Difference]: Start difference. First operand 1916 states and 2757 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:31:58,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:31:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:31:59,109 INFO L93 Difference]: Finished difference Result 3802 states and 5481 transitions. [2021-11-23 02:31:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:31:59,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 82 [2021-11-23 02:31:59,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:31:59,148 INFO L225 Difference]: With dead ends: 3802 [2021-11-23 02:31:59,149 INFO L226 Difference]: Without dead ends: 3796 [2021-11-23 02:31:59,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:31:59,154 INFO L933 BasicCegarLoop]: 1530 mSDtfsCounter, 1376 mSDsluCounter, 3071 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 4283 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:31:59,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 4283 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 02:31:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2021-11-23 02:31:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 3785. [2021-11-23 02:31:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 2406 states have (on average 1.3374896093100581) internal successors, (3218), 2474 states have internal predecessors, (3218), 1114 states have call successors, (1114), 265 states have call predecessors, (1114), 264 states have return successors, (1125), 1109 states have call predecessors, (1125), 1113 states have call successors, (1125) [2021-11-23 02:31:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5457 transitions. [2021-11-23 02:31:59,509 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5457 transitions. Word has length 82 [2021-11-23 02:31:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:31:59,513 INFO L470 AbstractCegarLoop]: Abstraction has 3785 states and 5457 transitions. [2021-11-23 02:31:59,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 02:31:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5457 transitions. [2021-11-23 02:31:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 02:31:59,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:31:59,531 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2021-11-23 02:31:59,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:31:59,531 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:31:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:31:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1342921544, now seen corresponding path program 1 times [2021-11-23 02:31:59,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:31:59,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849722078] [2021-11-23 02:31:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:31:59,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:31:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-23 02:32:00,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:00,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849722078] [2021-11-23 02:32:00,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849722078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:00,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:00,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:32:00,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743824026] [2021-11-23 02:32:00,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:00,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:00,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:00,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:00,032 INFO L87 Difference]: Start difference. First operand 3785 states and 5457 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:32:05,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:05,874 INFO L93 Difference]: Finished difference Result 9077 states and 13034 transitions. [2021-11-23 02:32:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:05,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2021-11-23 02:32:05,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:05,927 INFO L225 Difference]: With dead ends: 9077 [2021-11-23 02:32:05,928 INFO L226 Difference]: Without dead ends: 5313 [2021-11-23 02:32:05,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:05,951 INFO L933 BasicCegarLoop]: 1361 mSDtfsCounter, 578 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:05,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 2529 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 382 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-11-23 02:32:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-11-23 02:32:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 5304. [2021-11-23 02:32:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5304 states, 3382 states have (on average 1.335304553518628) internal successors, (4516), 3462 states have internal predecessors, (4516), 1529 states have call successors, (1529), 393 states have call predecessors, (1529), 392 states have return successors, (1548), 1520 states have call predecessors, (1548), 1528 states have call successors, (1548) [2021-11-23 02:32:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5304 states to 5304 states and 7593 transitions. [2021-11-23 02:32:06,285 INFO L78 Accepts]: Start accepts. Automaton has 5304 states and 7593 transitions. Word has length 123 [2021-11-23 02:32:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:06,287 INFO L470 AbstractCegarLoop]: Abstraction has 5304 states and 7593 transitions. [2021-11-23 02:32:06,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:32:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 5304 states and 7593 transitions. [2021-11-23 02:32:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 02:32:06,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:06,302 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-23 02:32:06,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:32:06,303 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -381529991, now seen corresponding path program 1 times [2021-11-23 02:32:06,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:06,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131972805] [2021-11-23 02:32:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:06,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-23 02:32:06,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:06,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131972805] [2021-11-23 02:32:06,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131972805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:06,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:06,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:32:06,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497141305] [2021-11-23 02:32:06,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:06,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:06,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:06,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:06,877 INFO L87 Difference]: Start difference. First operand 5304 states and 7593 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:32:12,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:12,770 INFO L93 Difference]: Finished difference Result 13247 states and 18934 transitions. [2021-11-23 02:32:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:12,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 124 [2021-11-23 02:32:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:12,860 INFO L225 Difference]: With dead ends: 13247 [2021-11-23 02:32:12,860 INFO L226 Difference]: Without dead ends: 7973 [2021-11-23 02:32:12,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:12,898 INFO L933 BasicCegarLoop]: 1820 mSDtfsCounter, 931 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:12,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 3037 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 391 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-11-23 02:32:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2021-11-23 02:32:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 7964. [2021-11-23 02:32:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 5105 states have (on average 1.3377081292850146) internal successors, (6829), 5245 states have internal predecessors, (6829), 2257 states have call successors, (2257), 602 states have call predecessors, (2257), 601 states have return successors, (2280), 2244 states have call predecessors, (2280), 2256 states have call successors, (2280) [2021-11-23 02:32:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 11366 transitions. [2021-11-23 02:32:13,485 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 11366 transitions. Word has length 124 [2021-11-23 02:32:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:13,486 INFO L470 AbstractCegarLoop]: Abstraction has 7964 states and 11366 transitions. [2021-11-23 02:32:13,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 02:32:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 11366 transitions. [2021-11-23 02:32:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 02:32:13,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:13,502 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 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] [2021-11-23 02:32:13,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:32:13,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:13,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash 901866756, now seen corresponding path program 1 times [2021-11-23 02:32:13,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:13,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564386744] [2021-11-23 02:32:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:13,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-23 02:32:13,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:13,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564386744] [2021-11-23 02:32:13,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564386744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:13,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:13,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:32:13,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473991494] [2021-11-23 02:32:13,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:13,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:13,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:13,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:13,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:13,895 INFO L87 Difference]: Start difference. First operand 7964 states and 11366 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:32:18,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:19,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:19,022 INFO L93 Difference]: Finished difference Result 12034 states and 17160 transitions. [2021-11-23 02:32:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 143 [2021-11-23 02:32:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:19,060 INFO L225 Difference]: With dead ends: 12034 [2021-11-23 02:32:19,061 INFO L226 Difference]: Without dead ends: 4100 [2021-11-23 02:32:19,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:19,096 INFO L933 BasicCegarLoop]: 1253 mSDtfsCounter, 5 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:19,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 2500 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-23 02:32:19,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-11-23 02:32:19,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 4052. [2021-11-23 02:32:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4052 states, 2604 states have (on average 1.3398617511520738) internal successors, (3489), 2672 states have internal predecessors, (3489), 1140 states have call successors, (1140), 308 states have call predecessors, (1140), 307 states have return successors, (1151), 1135 states have call predecessors, (1151), 1139 states have call successors, (1151) [2021-11-23 02:32:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4052 states to 4052 states and 5780 transitions. [2021-11-23 02:32:19,328 INFO L78 Accepts]: Start accepts. Automaton has 4052 states and 5780 transitions. Word has length 143 [2021-11-23 02:32:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:19,329 INFO L470 AbstractCegarLoop]: Abstraction has 4052 states and 5780 transitions. [2021-11-23 02:32:19,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:32:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 4052 states and 5780 transitions. [2021-11-23 02:32:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-23 02:32:19,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:19,339 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 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] [2021-11-23 02:32:19,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:32:19,339 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:19,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1105440751, now seen corresponding path program 1 times [2021-11-23 02:32:19,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:19,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279356445] [2021-11-23 02:32:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:19,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-23 02:32:19,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:19,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279356445] [2021-11-23 02:32:19,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279356445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:19,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:19,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:32:19,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698346010] [2021-11-23 02:32:19,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:19,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:32:19,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:32:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:32:19,736 INFO L87 Difference]: Start difference. First operand 4052 states and 5780 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:32:27,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:27,607 INFO L93 Difference]: Finished difference Result 8069 states and 11531 transitions. [2021-11-23 02:32:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:32:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 142 [2021-11-23 02:32:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:27,643 INFO L225 Difference]: With dead ends: 8069 [2021-11-23 02:32:27,644 INFO L226 Difference]: Without dead ends: 4082 [2021-11-23 02:32:27,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:32:27,663 INFO L933 BasicCegarLoop]: 1249 mSDtfsCounter, 2 mSDsluCounter, 4231 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4991 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:27,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4991 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 663 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 02:32:27,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-11-23 02:32:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 4072. [2021-11-23 02:32:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 2618 states have (on average 1.338044308632544) internal successors, (3503), 2688 states have internal predecessors, (3503), 1140 states have call successors, (1140), 308 states have call predecessors, (1140), 313 states have return successors, (1161), 1139 states have call predecessors, (1161), 1139 states have call successors, (1161) [2021-11-23 02:32:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 5804 transitions. [2021-11-23 02:32:27,885 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 5804 transitions. Word has length 142 [2021-11-23 02:32:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:27,887 INFO L470 AbstractCegarLoop]: Abstraction has 4072 states and 5804 transitions. [2021-11-23 02:32:27,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:32:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 5804 transitions. [2021-11-23 02:32:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 02:32:27,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:27,897 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 3, 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] [2021-11-23 02:32:27,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:32:27,898 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash -334644252, now seen corresponding path program 1 times [2021-11-23 02:32:27,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:27,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880228806] [2021-11-23 02:32:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:27,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-23 02:32:28,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:28,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880228806] [2021-11-23 02:32:28,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880228806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:28,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:28,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:32:28,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781577575] [2021-11-23 02:32:28,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:28,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:28,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:28,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:28,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:28,231 INFO L87 Difference]: Start difference. First operand 4072 states and 5804 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-23 02:32:32,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:32,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:32,576 INFO L93 Difference]: Finished difference Result 9618 states and 13677 transitions. [2021-11-23 02:32:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:32,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 143 [2021-11-23 02:32:32,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:32,612 INFO L225 Difference]: With dead ends: 9618 [2021-11-23 02:32:32,612 INFO L226 Difference]: Without dead ends: 5611 [2021-11-23 02:32:32,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:32,632 INFO L933 BasicCegarLoop]: 1699 mSDtfsCounter, 1340 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:32,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 2615 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 303 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 02:32:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-11-23 02:32:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 5597. [2021-11-23 02:32:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 3613 states have (on average 1.3368391918073623) internal successors, (4830), 3714 states have internal predecessors, (4830), 1537 states have call successors, (1537), 438 states have call predecessors, (1537), 446 states have return successors, (1567), 1537 states have call predecessors, (1567), 1536 states have call successors, (1567) [2021-11-23 02:32:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 7934 transitions. [2021-11-23 02:32:32,897 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 7934 transitions. Word has length 143 [2021-11-23 02:32:32,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:32,898 INFO L470 AbstractCegarLoop]: Abstraction has 5597 states and 7934 transitions. [2021-11-23 02:32:32,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-23 02:32:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 7934 transitions. [2021-11-23 02:32:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 02:32:32,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:32,909 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 3, 3, 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] [2021-11-23 02:32:32,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:32:32,910 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:32,911 INFO L85 PathProgramCache]: Analyzing trace with hash 568214379, now seen corresponding path program 1 times [2021-11-23 02:32:32,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:32,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072253161] [2021-11-23 02:32:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:32,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-23 02:32:33,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072253161] [2021-11-23 02:32:33,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072253161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:32:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7897684] [2021-11-23 02:32:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:33,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:33,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:33,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:32:33,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:32:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 5187 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:32:34,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-23 02:32:35,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:32:35,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7897684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:35,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:32:35,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:32:35,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866677461] [2021-11-23 02:32:35,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:35,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:32:35,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:35,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:32:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:32:35,346 INFO L87 Difference]: Start difference. First operand 5597 states and 7934 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:32:41,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:44,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:45,143 INFO L93 Difference]: Finished difference Result 16635 states and 23582 transitions. [2021-11-23 02:32:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:32:45,159 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), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 146 [2021-11-23 02:32:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:45,245 INFO L225 Difference]: With dead ends: 16635 [2021-11-23 02:32:45,246 INFO L226 Difference]: Without dead ends: 16629 [2021-11-23 02:32:45,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:32:45,257 INFO L933 BasicCegarLoop]: 2544 mSDtfsCounter, 2685 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2685 SdHoareTripleChecker+Valid, 4714 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:45,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2685 Valid, 4714 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1217 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2021-11-23 02:32:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16629 states. [2021-11-23 02:32:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16629 to 16500. [2021-11-23 02:32:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16500 states, 10638 states have (on average 1.3378454596728708) internal successors, (14232), 10951 states have internal predecessors, (14232), 4549 states have call successors, (4549), 1286 states have call predecessors, (4549), 1312 states have return successors, (4638), 4539 states have call predecessors, (4638), 4548 states have call successors, (4638) [2021-11-23 02:32:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16500 states to 16500 states and 23419 transitions. [2021-11-23 02:32:46,074 INFO L78 Accepts]: Start accepts. Automaton has 16500 states and 23419 transitions. Word has length 146 [2021-11-23 02:32:46,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:46,075 INFO L470 AbstractCegarLoop]: Abstraction has 16500 states and 23419 transitions. [2021-11-23 02:32:46,075 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), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:32:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 16500 states and 23419 transitions. [2021-11-23 02:32:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-23 02:32:46,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:46,099 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 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] [2021-11-23 02:32:46,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:46,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 02:32:46,319 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:46,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1337146497, now seen corresponding path program 1 times [2021-11-23 02:32:46,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:46,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132265107] [2021-11-23 02:32:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:46,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-11-23 02:32:46,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:46,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132265107] [2021-11-23 02:32:46,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132265107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:32:46,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011063997] [2021-11-23 02:32:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:46,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:46,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:46,831 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:32:46,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:32:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 5315 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:32:48,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-23 02:32:48,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:32:48,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011063997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:48,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:32:48,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-23 02:32:48,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103285719] [2021-11-23 02:32:48,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:48,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:48,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:32:48,792 INFO L87 Difference]: Start difference. First operand 16500 states and 23419 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-23 02:32:50,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:52,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:32:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:54,631 INFO L93 Difference]: Finished difference Result 35602 states and 50539 transitions. [2021-11-23 02:32:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 158 [2021-11-23 02:32:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:54,741 INFO L225 Difference]: With dead ends: 35602 [2021-11-23 02:32:54,742 INFO L226 Difference]: Without dead ends: 19035 [2021-11-23 02:32:54,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:32:54,827 INFO L933 BasicCegarLoop]: 1567 mSDtfsCounter, 1296 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 2804 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:54,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 2804 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 340 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 02:32:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19035 states. [2021-11-23 02:32:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19035 to 18087. [2021-11-23 02:32:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18087 states, 11621 states have (on average 1.332673608123225) internal successors, (15487), 11976 states have internal predecessors, (15487), 5041 states have call successors, (5041), 1395 states have call predecessors, (5041), 1424 states have return successors, (5119), 5034 states have call predecessors, (5119), 5040 states have call successors, (5119) [2021-11-23 02:32:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18087 states to 18087 states and 25647 transitions. [2021-11-23 02:32:56,030 INFO L78 Accepts]: Start accepts. Automaton has 18087 states and 25647 transitions. Word has length 158 [2021-11-23 02:32:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:56,031 INFO L470 AbstractCegarLoop]: Abstraction has 18087 states and 25647 transitions. [2021-11-23 02:32:56,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-23 02:32:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 18087 states and 25647 transitions. [2021-11-23 02:32:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-23 02:32:56,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:56,064 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 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] [2021-11-23 02:32:56,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:32:56,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:56,279 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1971564935, now seen corresponding path program 1 times [2021-11-23 02:32:56,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:56,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044302343] [2021-11-23 02:32:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:56,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-11-23 02:32:56,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044302343] [2021-11-23 02:32:56,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044302343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:56,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:56,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:32:56,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378399916] [2021-11-23 02:32:56,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:56,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:56,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:56,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:56,588 INFO L87 Difference]: Start difference. First operand 18087 states and 25647 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 02:33:01,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:02,200 INFO L93 Difference]: Finished difference Result 42222 states and 61045 transitions. [2021-11-23 02:33:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 170 [2021-11-23 02:33:02,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:02,342 INFO L225 Difference]: With dead ends: 42222 [2021-11-23 02:33:02,342 INFO L226 Difference]: Without dead ends: 24220 [2021-11-23 02:33:02,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:02,410 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 296 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 2999 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:02,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 2999 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 357 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 02:33:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24220 states. [2021-11-23 02:33:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24220 to 18111. [2021-11-23 02:33:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18111 states, 11633 states have (on average 1.3323304392676008) internal successors, (15499), 11988 states have internal predecessors, (15499), 5053 states have call successors, (5053), 1395 states have call predecessors, (5053), 1424 states have return successors, (5131), 5046 states have call predecessors, (5131), 5052 states have call successors, (5131) [2021-11-23 02:33:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18111 states to 18111 states and 25683 transitions. [2021-11-23 02:33:03,816 INFO L78 Accepts]: Start accepts. Automaton has 18111 states and 25683 transitions. Word has length 170 [2021-11-23 02:33:03,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:03,817 INFO L470 AbstractCegarLoop]: Abstraction has 18111 states and 25683 transitions. [2021-11-23 02:33:03,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-23 02:33:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 18111 states and 25683 transitions. [2021-11-23 02:33:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 02:33:03,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:03,852 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 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] [2021-11-23 02:33:03,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:33:03,852 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1502586966, now seen corresponding path program 1 times [2021-11-23 02:33:03,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:03,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029901975] [2021-11-23 02:33:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:03,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-23 02:33:04,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:04,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029901975] [2021-11-23 02:33:04,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029901975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:04,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:04,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:04,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804770681] [2021-11-23 02:33:04,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:04,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:04,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:04,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:04,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:04,357 INFO L87 Difference]: Start difference. First operand 18111 states and 25683 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:33:06,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:09,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:10,232 INFO L93 Difference]: Finished difference Result 28609 states and 40618 transitions. [2021-11-23 02:33:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:10,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 173 [2021-11-23 02:33:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:10,328 INFO L225 Difference]: With dead ends: 28609 [2021-11-23 02:33:10,328 INFO L226 Difference]: Without dead ends: 18159 [2021-11-23 02:33:10,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:10,364 INFO L933 BasicCegarLoop]: 1250 mSDtfsCounter, 4 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2494 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:10,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2494 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:33:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18159 states. [2021-11-23 02:33:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18159 to 18151. [2021-11-23 02:33:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18151 states, 11664 states have (on average 1.3314471879286693) internal successors, (15530), 12028 states have internal predecessors, (15530), 5053 states have call successors, (5053), 1395 states have call predecessors, (5053), 1433 states have return successors, (5140), 5046 states have call predecessors, (5140), 5052 states have call successors, (5140) [2021-11-23 02:33:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18151 states to 18151 states and 25723 transitions. [2021-11-23 02:33:11,373 INFO L78 Accepts]: Start accepts. Automaton has 18151 states and 25723 transitions. Word has length 173 [2021-11-23 02:33:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:11,374 INFO L470 AbstractCegarLoop]: Abstraction has 18151 states and 25723 transitions. [2021-11-23 02:33:11,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:33:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18151 states and 25723 transitions. [2021-11-23 02:33:11,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-23 02:33:11,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:11,407 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 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] [2021-11-23 02:33:11,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:33:11,408 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:11,409 INFO L85 PathProgramCache]: Analyzing trace with hash -529432396, now seen corresponding path program 1 times [2021-11-23 02:33:11,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:11,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243170368] [2021-11-23 02:33:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:11,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-23 02:33:12,085 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:12,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243170368] [2021-11-23 02:33:12,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243170368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:12,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:12,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:33:12,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428869263] [2021-11-23 02:33:12,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:12,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:33:12,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:12,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:33:12,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:33:12,088 INFO L87 Difference]: Start difference. First operand 18151 states and 25723 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-23 02:33:17,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:18,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:19,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:20,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:22,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:23,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:28,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:30,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:32,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:34,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:36,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:38,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:38,705 INFO L93 Difference]: Finished difference Result 42171 states and 59700 transitions. [2021-11-23 02:33:38,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:33:38,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) Word has length 174 [2021-11-23 02:33:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:38,848 INFO L225 Difference]: With dead ends: 42171 [2021-11-23 02:33:38,848 INFO L226 Difference]: Without dead ends: 24105 [2021-11-23 02:33:38,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:33:38,918 INFO L933 BasicCegarLoop]: 1301 mSDtfsCounter, 1976 mSDsluCounter, 3128 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 1294 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2249 SdHoareTripleChecker+Valid, 4042 SdHoareTripleChecker+Invalid, 5404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:38,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2249 Valid, 4042 Invalid, 5404 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1294 Valid, 4106 Invalid, 4 Unknown, 0 Unchecked, 25.7s Time] [2021-11-23 02:33:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24105 states. [2021-11-23 02:33:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24105 to 23387. [2021-11-23 02:33:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23387 states, 15024 states have (on average 1.3283413205537806) internal successors, (19957), 15485 states have internal predecessors, (19957), 6499 states have call successors, (6499), 1797 states have call predecessors, (6499), 1863 states have return successors, (6601), 6514 states have call predecessors, (6601), 6498 states have call successors, (6601) [2021-11-23 02:33:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23387 states to 23387 states and 33057 transitions. [2021-11-23 02:33:40,381 INFO L78 Accepts]: Start accepts. Automaton has 23387 states and 33057 transitions. Word has length 174 [2021-11-23 02:33:40,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:40,382 INFO L470 AbstractCegarLoop]: Abstraction has 23387 states and 33057 transitions. [2021-11-23 02:33:40,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-23 02:33:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 23387 states and 33057 transitions. [2021-11-23 02:33:40,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 02:33:40,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:40,427 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 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] [2021-11-23 02:33:40,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:33:40,427 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:40,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:40,428 INFO L85 PathProgramCache]: Analyzing trace with hash 529043385, now seen corresponding path program 1 times [2021-11-23 02:33:40,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:40,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894709238] [2021-11-23 02:33:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:40,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 02:33:41,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:41,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894709238] [2021-11-23 02:33:41,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894709238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:41,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:41,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:41,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986562822] [2021-11-23 02:33:41,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:41,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:41,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:41,009 INFO L87 Difference]: Start difference. First operand 23387 states and 33057 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-23 02:33:45,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:46,157 INFO L93 Difference]: Finished difference Result 23393 states and 33063 transitions. [2021-11-23 02:33:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:46,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) Word has length 178 [2021-11-23 02:33:46,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:46,260 INFO L225 Difference]: With dead ends: 23393 [2021-11-23 02:33:46,260 INFO L226 Difference]: Without dead ends: 23388 [2021-11-23 02:33:46,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:33:46,276 INFO L933 BasicCegarLoop]: 1251 mSDtfsCounter, 0 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2502 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:46,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2502 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 325 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-11-23 02:33:46,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23388 states. [2021-11-23 02:33:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23388 to 23388. [2021-11-23 02:33:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23388 states, 15025 states have (on average 1.3283194675540766) internal successors, (19958), 15486 states have internal predecessors, (19958), 6499 states have call successors, (6499), 1797 states have call predecessors, (6499), 1863 states have return successors, (6601), 6514 states have call predecessors, (6601), 6498 states have call successors, (6601) [2021-11-23 02:33:47,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23388 states to 23388 states and 33058 transitions. [2021-11-23 02:33:47,577 INFO L78 Accepts]: Start accepts. Automaton has 23388 states and 33058 transitions. Word has length 178 [2021-11-23 02:33:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:47,577 INFO L470 AbstractCegarLoop]: Abstraction has 23388 states and 33058 transitions. [2021-11-23 02:33:47,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-23 02:33:47,578 INFO L276 IsEmpty]: Start isEmpty. Operand 23388 states and 33058 transitions. [2021-11-23 02:33:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 02:33:47,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:47,611 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 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] [2021-11-23 02:33:47,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:33:47,611 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:47,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:47,612 INFO L85 PathProgramCache]: Analyzing trace with hash 441619614, now seen corresponding path program 1 times [2021-11-23 02:33:47,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:47,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468021279] [2021-11-23 02:33:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:47,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 02:33:47,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:47,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468021279] [2021-11-23 02:33:47,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468021279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024865202] [2021-11-23 02:33:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:47,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:47,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:47,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:47,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42b86979-3094-45e3-9b5a-a5ddedc23ff9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:33:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:49,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 5317 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:33:49,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 02:33:49,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:33:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 02:33:50,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024865202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:33:50,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927822779] [2021-11-23 02:33:50,291 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2021-11-23 02:33:50,291 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:33:50,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:33:50,304 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:33:50,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:34:03,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:03,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:34:05,274 INFO L244 Elim1Store]: Index analysis took 1717 ms [2021-11-23 02:36:35,119 WARN L227 SmtUtils]: Spent 2.49m on a formula simplification. DAG size of input: 3703 DAG size of output: 1989 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:36:35,135 INFO L354 Elim1Store]: treesize reduction 6563, result has 34.1 percent of original size [2021-11-23 02:36:35,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 285 select indices, 285 select index equivalence classes, 40474 disjoint index pairs (out of 40470 index pairs), introduced 285 new quantified variables, introduced 285 case distinctions, treesize of input 1435 treesize of output 4262 [2021-11-23 02:36:45,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:36:45,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:36:52,557 INFO L244 Elim1Store]: Index analysis took 8687 ms [2021-11-23 02:43:25,048 WARN L227 SmtUtils]: Spent 6.54m on a formula simplification. DAG size of input: 4559 DAG size of output: 2279 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:43:25,055 INFO L354 Elim1Store]: treesize reduction 10814, result has 25.5 percent of original size [2021-11-23 02:43:25,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 288 select indices, 288 select index equivalence classes, 40759 disjoint index pairs (out of 41328 index pairs), introduced 288 new quantified variables, introduced 855 case distinctions, treesize of input 1454 treesize of output 4581 [2021-11-23 02:43:32,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 34 select indices, 34 select index equivalence classes, 595 disjoint index pairs (out of 561 index pairs), introduced 34 new quantified variables, introduced 0 case distinctions, treesize of input 799 treesize of output 742 [2021-11-23 02:43:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:34,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:34,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:34,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:34,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:35,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 36 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 1447 treesize of output 1161 [2021-11-23 02:43:39,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:39,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:39,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:39,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:39,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:43:40,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 36 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 1447 treesize of output 1161 [2021-11-23 02:43:42,153 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 285 [2021-11-23 02:43:42,624 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 285 [2021-11-23 02:43:43,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:43:43,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-23 02:43:43,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 02:43:43,822 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 285 [2021-11-23 02:43:47,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:43:47,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:43:47,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:43:48,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 02:43:48,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:43:48,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-23 02:43:54,026 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 285 [2021-11-23 02:43:54,613 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 285 [2021-11-23 02:43:55,040 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 222 for LOIs [2021-11-23 02:43:55,122 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 227 for LOIs