./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:53:56,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:53:56,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:53:56,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:53:56,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:53:56,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:53:56,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:53:56,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:53:56,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:53:56,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:53:56,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:53:56,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:53:56,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:53:56,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:53:56,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:53:56,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:53:56,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:53:56,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:53:56,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:53:56,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:53:56,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:53:56,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:53:56,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:53:56,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:53:56,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:53:56,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:53:56,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:53:56,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:53:56,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:53:56,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:53:56,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:53:56,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:53:56,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:53:56,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:53:56,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:53:56,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:53:56,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:53:56,470 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:53:56,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:53:56,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:53:56,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:53:56,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:53:56,524 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:53:56,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:53:56,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:53:56,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:53:56,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:53:56,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:53:56,526 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:53:56,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:53:56,527 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:53:56,527 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:53:56,527 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:53:56,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:53:56,528 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:53:56,528 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:53:56,528 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:53:56,529 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:53:56,533 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:53:56,533 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:53:56,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:53:56,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:53:56,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:53:56,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:53:56,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:53:56,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:53:56,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:53:56,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:53:56,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:53:56,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:53:56,540 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:53:56,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:53:56,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:53:56,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:53:56,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:53:56,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:53:56,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:53:56,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:53:56,543 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:53:56,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:53:56,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:53:56,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:53:56,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:53:56,544 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_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d [2021-11-21 00:53:56,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:53:57,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:53:57,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:53:57,040 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:53:57,041 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:53:57,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2021-11-21 00:53:57,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/data/88a5a7b52/01c4cb8527354261ac9ff97c148facf0/FLAGfd4b70094 [2021-11-21 00:53:57,957 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:53:57,958 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2021-11-21 00:53:57,985 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/data/88a5a7b52/01c4cb8527354261ac9ff97c148facf0/FLAGfd4b70094 [2021-11-21 00:53:58,097 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/data/88a5a7b52/01c4cb8527354261ac9ff97c148facf0 [2021-11-21 00:53:58,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:53:58,105 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:53:58,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:53:58,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:53:58,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:53:58,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:53:58" (1/1) ... [2021-11-21 00:53:58,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f152ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:58, skipping insertion in model container [2021-11-21 00:53:58,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:53:58" (1/1) ... [2021-11-21 00:53:58,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:53:58,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:53:58,621 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_093f9605-98f5-45ab-bf89-4215605d949a/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2021-11-21 00:53:59,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:53:59,040 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:53:59,100 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_093f9605-98f5-45ab-bf89-4215605d949a/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2021-11-21 00:53:59,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:53:59,269 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:53:59,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59 WrapperNode [2021-11-21 00:53:59,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:53:59,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:53:59,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:53:59,271 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:53:59,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,425 INFO L137 Inliner]: procedures = 95, calls = 347, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 920 [2021-11-21 00:53:59,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:53:59,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:53:59,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:53:59,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:53:59,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:53:59,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:53:59,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:53:59,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:53:59,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (1/1) ... [2021-11-21 00:53:59,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:53:59,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:53:59,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:53:59,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_093f9605-98f5-45ab-bf89-4215605d949a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:53:59,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:53:59,735 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 00:53:59,735 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 00:53:59,736 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-21 00:53:59,736 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-21 00:53:59,736 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 00:53:59,736 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 00:53:59,736 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 00:53:59,737 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 00:53:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 00:53:59,737 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 00:53:59,737 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 00:53:59,738 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 00:53:59,738 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 00:53:59,738 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 00:53:59,738 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 00:53:59,738 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 00:53:59,739 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-21 00:53:59,739 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-21 00:53:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-21 00:53:59,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-21 00:53:59,740 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 00:53:59,741 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 00:53:59,741 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 00:53:59,741 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 00:53:59,741 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 00:53:59,742 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 00:53:59,742 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-21 00:53:59,743 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-21 00:53:59,743 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 00:53:59,743 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 00:53:59,743 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 00:53:59,743 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 00:53:59,744 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 00:53:59,744 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 00:53:59,744 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 00:53:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 00:53:59,745 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 00:53:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 00:53:59,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:53:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-21 00:53:59,746 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-21 00:53:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 00:53:59,747 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 00:53:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 00:53:59,748 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 00:53:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 00:53:59,750 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 00:53:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-21 00:53:59,752 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-21 00:53:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:53:59,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:53:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 00:53:59,754 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 00:53:59,975 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:53:59,978 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:54:01,498 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:54:02,241 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:54:02,241 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:54:02,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:54:02 BoogieIcfgContainer [2021-11-21 00:54:02,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:54:02,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:54:02,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:54:02,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:54:02,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:53:58" (1/3) ... [2021-11-21 00:54:02,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1853739b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:54:02, skipping insertion in model container [2021-11-21 00:54:02,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:53:59" (2/3) ... [2021-11-21 00:54:02,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1853739b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:54:02, skipping insertion in model container [2021-11-21 00:54:02,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:54:02" (3/3) ... [2021-11-21 00:54:02,257 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product30.cil.c [2021-11-21 00:54:02,264 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:54:02,264 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:54:02,347 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:54:02,355 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 [2021-11-21 00:54:02,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:54:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-21 00:54:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 00:54:02,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:02,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:54:02,411 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:02,418 INFO L85 PathProgramCache]: Analyzing trace with hash 399077073, now seen corresponding path program 1 times [2021-11-21 00:54:02,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:02,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830372767] [2021-11-21 00:54:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:02,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:02,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:02,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830372767] [2021-11-21 00:54:02,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830372767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:02,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:02,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:54:02,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197609721] [2021-11-21 00:54:02,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:02,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:54:02,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:54:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:54:03,030 INFO L87 Difference]: Start difference. First operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 00:54:03,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:03,275 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2021-11-21 00:54:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:54:03,277 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2021-11-21 00:54:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:03,312 INFO L225 Difference]: With dead ends: 401 [2021-11-21 00:54:03,312 INFO L226 Difference]: Without dead ends: 379 [2021-11-21 00:54:03,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:54:03,327 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:03,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 563 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:54:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-21 00:54:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2021-11-21 00:54:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 256 states have (on average 1.58203125) internal successors, (405), 277 states have internal predecessors, (405), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-21 00:54:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2021-11-21 00:54:03,532 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2021-11-21 00:54:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:03,534 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2021-11-21 00:54:03,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 00:54:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2021-11-21 00:54:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 00:54:03,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:03,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:54:03,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:54:03,544 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:03,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1563562737, now seen corresponding path program 1 times [2021-11-21 00:54:03,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:03,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611436109] [2021-11-21 00:54:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:03,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:03,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611436109] [2021-11-21 00:54:03,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611436109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:03,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:03,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:54:03,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446654080] [2021-11-21 00:54:03,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:03,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:54:03,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:03,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:54:03,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:54:03,855 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 00:54:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:06,450 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2021-11-21 00:54:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:54:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2021-11-21 00:54:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:06,461 INFO L225 Difference]: With dead ends: 1243 [2021-11-21 00:54:06,462 INFO L226 Difference]: Without dead ends: 880 [2021-11-21 00:54:06,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:54:06,469 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1215 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:06,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 1378 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:54:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-21 00:54:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2021-11-21 00:54:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 558 states have (on average 1.603942652329749) internal successors, (895), 588 states have internal predecessors, (895), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2021-11-21 00:54:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2021-11-21 00:54:06,557 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2021-11-21 00:54:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:06,558 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2021-11-21 00:54:06,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 00:54:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2021-11-21 00:54:06,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 00:54:06,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:06,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:54:06,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:54:06,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:06,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:06,569 INFO L85 PathProgramCache]: Analyzing trace with hash 92014309, now seen corresponding path program 1 times [2021-11-21 00:54:06,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:06,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001759875] [2021-11-21 00:54:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:06,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:54:06,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:06,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001759875] [2021-11-21 00:54:06,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001759875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:06,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:06,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-21 00:54:06,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967655093] [2021-11-21 00:54:06,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:06,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:54:06,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:54:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:54:06,881 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-21 00:54:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:13,311 INFO L93 Difference]: Finished difference Result 3318 states and 5440 transitions. [2021-11-21 00:54:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-21 00:54:13,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 76 [2021-11-21 00:54:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:13,351 INFO L225 Difference]: With dead ends: 3318 [2021-11-21 00:54:13,351 INFO L226 Difference]: Without dead ends: 2541 [2021-11-21 00:54:13,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:54:13,373 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 2515 mSDsluCounter, 3915 mSDsCounter, 0 mSdLazyCounter, 7480 mSolverCounterSat, 2156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2547 SdHoareTripleChecker+Valid, 4700 SdHoareTripleChecker+Invalid, 9636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2156 IncrementalHoareTripleChecker+Valid, 7480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:13,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2547 Valid, 4700 Invalid, 9636 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2156 Valid, 7480 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-21 00:54:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-11-21 00:54:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1799. [2021-11-21 00:54:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1233 states have (on average 1.5660989456609895) internal successors, (1931), 1305 states have internal predecessors, (1931), 471 states have call successors, (471), 82 states have call predecessors, (471), 94 states have return successors, (490), 444 states have call predecessors, (490), 466 states have call successors, (490) [2021-11-21 00:54:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2892 transitions. [2021-11-21 00:54:13,622 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2892 transitions. Word has length 76 [2021-11-21 00:54:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:13,624 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2892 transitions. [2021-11-21 00:54:13,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-21 00:54:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2892 transitions. [2021-11-21 00:54:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-21 00:54:13,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:13,632 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:13,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:54:13,633 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash -60652630, now seen corresponding path program 1 times [2021-11-21 00:54:13,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:13,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660637361] [2021-11-21 00:54:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:13,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:54:13,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:13,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660637361] [2021-11-21 00:54:13,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660637361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:13,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:13,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-21 00:54:13,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460726561] [2021-11-21 00:54:13,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:13,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:54:13,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:13,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:54:13,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:54:13,893 INFO L87 Difference]: Start difference. First operand 1799 states and 2892 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-21 00:54:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:17,645 INFO L93 Difference]: Finished difference Result 5054 states and 8153 transitions. [2021-11-21 00:54:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:54:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2021-11-21 00:54:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:17,687 INFO L225 Difference]: With dead ends: 5054 [2021-11-21 00:54:17,688 INFO L226 Difference]: Without dead ends: 3273 [2021-11-21 00:54:17,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-21 00:54:17,712 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 1741 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 3417 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 3417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:17,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1806 Valid, 3171 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 3417 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-21 00:54:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-21 00:54:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3111. [2021-11-21 00:54:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2207 states have (on average 1.5894879927503398) internal successors, (3508), 2298 states have internal predecessors, (3508), 729 states have call successors, (729), 144 states have call predecessors, (729), 174 states have return successors, (792), 712 states have call predecessors, (792), 724 states have call successors, (792) [2021-11-21 00:54:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5029 transitions. [2021-11-21 00:54:18,016 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5029 transitions. Word has length 78 [2021-11-21 00:54:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:18,018 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 5029 transitions. [2021-11-21 00:54:18,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-21 00:54:18,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5029 transitions. [2021-11-21 00:54:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-21 00:54:18,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:18,025 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:18,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:54:18,026 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2034124166, now seen corresponding path program 1 times [2021-11-21 00:54:18,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:18,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853029508] [2021-11-21 00:54:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:18,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:54:18,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:18,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853029508] [2021-11-21 00:54:18,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853029508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:18,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:18,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:54:18,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146315326] [2021-11-21 00:54:18,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:18,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:54:18,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:54:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:54:18,255 INFO L87 Difference]: Start difference. First operand 3111 states and 5029 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:54:18,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:18,749 INFO L93 Difference]: Finished difference Result 5558 states and 9001 transitions. [2021-11-21 00:54:18,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:54:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2021-11-21 00:54:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:18,787 INFO L225 Difference]: With dead ends: 5558 [2021-11-21 00:54:18,788 INFO L226 Difference]: Without dead ends: 3223 [2021-11-21 00:54:18,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:54:18,810 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 6 mSDsluCounter, 2958 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:18,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3350 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:54:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-11-21 00:54:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3181. [2021-11-21 00:54:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 2257 states have (on average 1.5764288879042978) internal successors, (3558), 2348 states have internal predecessors, (3558), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 732 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-21 00:54:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 5129 transitions. [2021-11-21 00:54:19,092 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 5129 transitions. Word has length 83 [2021-11-21 00:54:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:19,093 INFO L470 AbstractCegarLoop]: Abstraction has 3181 states and 5129 transitions. [2021-11-21 00:54:19,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:54:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 5129 transitions. [2021-11-21 00:54:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 00:54:19,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:19,098 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:54:19,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:54:19,098 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:19,099 INFO L85 PathProgramCache]: Analyzing trace with hash 565475326, now seen corresponding path program 1 times [2021-11-21 00:54:19,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:19,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933449437] [2021-11-21 00:54:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:19,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:54:19,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:19,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933449437] [2021-11-21 00:54:19,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933449437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:19,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:19,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:54:19,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073183105] [2021-11-21 00:54:19,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:19,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:54:19,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:54:19,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:54:19,234 INFO L87 Difference]: Start difference. First operand 3181 states and 5129 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:54:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:19,648 INFO L93 Difference]: Finished difference Result 5664 states and 9141 transitions. [2021-11-21 00:54:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:54:19,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2021-11-21 00:54:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:19,683 INFO L225 Difference]: With dead ends: 5664 [2021-11-21 00:54:19,684 INFO L226 Difference]: Without dead ends: 3273 [2021-11-21 00:54:19,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:54:19,704 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 7 mSDsluCounter, 2947 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:19,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3336 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:54:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-21 00:54:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3191. [2021-11-21 00:54:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 2267 states have (on average 1.5738861932068813) internal successors, (3568), 2348 states have internal predecessors, (3568), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 742 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-21 00:54:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 5139 transitions. [2021-11-21 00:54:19,970 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 5139 transitions. Word has length 82 [2021-11-21 00:54:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:19,971 INFO L470 AbstractCegarLoop]: Abstraction has 3191 states and 5139 transitions. [2021-11-21 00:54:19,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:54:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 5139 transitions. [2021-11-21 00:54:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-21 00:54:19,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:19,976 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:19,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:54:19,976 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:19,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2142430362, now seen corresponding path program 1 times [2021-11-21 00:54:19,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:19,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441171484] [2021-11-21 00:54:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:19,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:54:20,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441171484] [2021-11-21 00:54:20,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441171484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:20,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:20,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:54:20,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552478375] [2021-11-21 00:54:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:20,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:54:20,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:54:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:54:20,116 INFO L87 Difference]: Start difference. First operand 3191 states and 5139 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:54:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:20,573 INFO L93 Difference]: Finished difference Result 5682 states and 9159 transitions. [2021-11-21 00:54:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:54:20,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2021-11-21 00:54:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:20,606 INFO L225 Difference]: With dead ends: 5682 [2021-11-21 00:54:20,606 INFO L226 Difference]: Without dead ends: 3283 [2021-11-21 00:54:20,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:54:20,626 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 7 mSDsluCounter, 2947 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:20,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3336 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:54:20,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-11-21 00:54:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 3201. [2021-11-21 00:54:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 2277 states have (on average 1.5713658322353974) internal successors, (3578), 2348 states have internal predecessors, (3578), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 752 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-21 00:54:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 5149 transitions. [2021-11-21 00:54:20,895 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 5149 transitions. Word has length 83 [2021-11-21 00:54:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:20,896 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 5149 transitions. [2021-11-21 00:54:20,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:54:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 5149 transitions. [2021-11-21 00:54:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:54:20,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:20,910 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:20,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:54:20,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1679754866, now seen corresponding path program 1 times [2021-11-21 00:54:20,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:20,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804081293] [2021-11-21 00:54:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:20,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:54:21,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:21,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804081293] [2021-11-21 00:54:21,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804081293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:21,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:21,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 00:54:21,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281959901] [2021-11-21 00:54:21,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:21,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:54:21,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:21,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:54:21,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:54:21,129 INFO L87 Difference]: Start difference. First operand 3201 states and 5149 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-21 00:54:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:24,013 INFO L93 Difference]: Finished difference Result 8001 states and 12951 transitions. [2021-11-21 00:54:24,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:54:24,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 87 [2021-11-21 00:54:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:24,065 INFO L225 Difference]: With dead ends: 8001 [2021-11-21 00:54:24,066 INFO L226 Difference]: Without dead ends: 5352 [2021-11-21 00:54:24,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:54:24,091 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 2067 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2232 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:24,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2232 Valid, 1703 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 1992 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 00:54:24,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5352 states. [2021-11-21 00:54:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5352 to 5213. [2021-11-21 00:54:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 3632 states have (on average 1.5327643171806167) internal successors, (5567), 3773 states have internal predecessors, (5567), 1243 states have call successors, (1243), 257 states have call predecessors, (1243), 337 states have return successors, (1463), 1259 states have call predecessors, (1463), 1238 states have call successors, (1463) [2021-11-21 00:54:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 8273 transitions. [2021-11-21 00:54:24,723 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 8273 transitions. Word has length 87 [2021-11-21 00:54:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:24,723 INFO L470 AbstractCegarLoop]: Abstraction has 5213 states and 8273 transitions. [2021-11-21 00:54:24,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-21 00:54:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 8273 transitions. [2021-11-21 00:54:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-21 00:54:24,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:24,730 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:24,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:54:24,730 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 477129719, now seen corresponding path program 1 times [2021-11-21 00:54:24,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:24,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274248981] [2021-11-21 00:54:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:24,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:54:24,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:24,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274248981] [2021-11-21 00:54:24,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274248981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:24,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:24,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:54:24,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659636988] [2021-11-21 00:54:24,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:24,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:54:24,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:54:24,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:54:24,888 INFO L87 Difference]: Start difference. First operand 5213 states and 8273 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 00:54:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:29,076 INFO L93 Difference]: Finished difference Result 17098 states and 27876 transitions. [2021-11-21 00:54:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:54:29,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-11-21 00:54:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:29,212 INFO L225 Difference]: With dead ends: 17098 [2021-11-21 00:54:29,212 INFO L226 Difference]: Without dead ends: 11903 [2021-11-21 00:54:29,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:54:29,268 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 2211 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 982 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2324 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 982 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:29,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2324 Valid, 2236 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [982 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-21 00:54:29,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11903 states. [2021-11-21 00:54:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11903 to 11012. [2021-11-21 00:54:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11012 states, 7520 states have (on average 1.5246010638297873) internal successors, (11465), 7923 states have internal predecessors, (11465), 2803 states have call successors, (2803), 523 states have call predecessors, (2803), 688 states have return successors, (3465), 2796 states have call predecessors, (3465), 2798 states have call successors, (3465) [2021-11-21 00:54:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11012 states to 11012 states and 17733 transitions. [2021-11-21 00:54:30,560 INFO L78 Accepts]: Start accepts. Automaton has 11012 states and 17733 transitions. Word has length 90 [2021-11-21 00:54:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:30,561 INFO L470 AbstractCegarLoop]: Abstraction has 11012 states and 17733 transitions. [2021-11-21 00:54:30,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 00:54:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 11012 states and 17733 transitions. [2021-11-21 00:54:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-21 00:54:30,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:30,569 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:30,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:54:30,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:30,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1323647733, now seen corresponding path program 1 times [2021-11-21 00:54:30,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:30,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209624574] [2021-11-21 00:54:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:30,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:54:30,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:30,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209624574] [2021-11-21 00:54:30,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209624574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:30,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:30,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:54:30,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913628672] [2021-11-21 00:54:30,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:30,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:54:30,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:30,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:54:30,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:54:30,796 INFO L87 Difference]: Start difference. First operand 11012 states and 17733 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 00:54:33,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:33,809 INFO L93 Difference]: Finished difference Result 21737 states and 35165 transitions. [2021-11-21 00:54:33,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:54:33,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2021-11-21 00:54:33,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:33,924 INFO L225 Difference]: With dead ends: 21737 [2021-11-21 00:54:33,925 INFO L226 Difference]: Without dead ends: 12224 [2021-11-21 00:54:33,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:54:33,975 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 986 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:33,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 1951 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 00:54:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12224 states. [2021-11-21 00:54:34,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12224 to 11246. [2021-11-21 00:54:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11246 states, 7682 states have (on average 1.5208279093985941) internal successors, (11683), 8113 states have internal predecessors, (11683), 2817 states have call successors, (2817), 555 states have call predecessors, (2817), 746 states have return successors, (3553), 2808 states have call predecessors, (3553), 2812 states have call successors, (3553) [2021-11-21 00:54:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 18053 transitions. [2021-11-21 00:54:35,081 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 18053 transitions. Word has length 91 [2021-11-21 00:54:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:35,083 INFO L470 AbstractCegarLoop]: Abstraction has 11246 states and 18053 transitions. [2021-11-21 00:54:35,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 00:54:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 18053 transitions. [2021-11-21 00:54:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-21 00:54:35,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:35,089 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:35,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:54:35,090 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:35,091 INFO L85 PathProgramCache]: Analyzing trace with hash 589539960, now seen corresponding path program 1 times [2021-11-21 00:54:35,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:35,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013286719] [2021-11-21 00:54:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:35,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:54:35,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:35,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013286719] [2021-11-21 00:54:35,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013286719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:35,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:35,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:54:35,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126805813] [2021-11-21 00:54:35,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:35,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:54:35,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:54:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:54:35,253 INFO L87 Difference]: Start difference. First operand 11246 states and 18053 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:54:38,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:38,237 INFO L93 Difference]: Finished difference Result 32767 states and 53286 transitions. [2021-11-21 00:54:38,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:54:38,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2021-11-21 00:54:38,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:38,408 INFO L225 Difference]: With dead ends: 32767 [2021-11-21 00:54:38,409 INFO L226 Difference]: Without dead ends: 21538 [2021-11-21 00:54:38,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:54:38,476 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 1165 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:38,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 967 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 00:54:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21538 states. [2021-11-21 00:54:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21538 to 19780. [2021-11-21 00:54:40,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19780 states, 13556 states have (on average 1.5188846267335496) internal successors, (20590), 14397 states have internal predecessors, (20590), 4864 states have call successors, (4864), 969 states have call predecessors, (4864), 1359 states have return successors, (6446), 4735 states have call predecessors, (6446), 4859 states have call successors, (6446) [2021-11-21 00:54:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19780 states to 19780 states and 31900 transitions. [2021-11-21 00:54:40,874 INFO L78 Accepts]: Start accepts. Automaton has 19780 states and 31900 transitions. Word has length 96 [2021-11-21 00:54:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:40,875 INFO L470 AbstractCegarLoop]: Abstraction has 19780 states and 31900 transitions. [2021-11-21 00:54:40,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:54:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 19780 states and 31900 transitions. [2021-11-21 00:54:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-21 00:54:40,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:40,882 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:40,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:54:40,882 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:40,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1721344587, now seen corresponding path program 1 times [2021-11-21 00:54:40,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:40,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646187417] [2021-11-21 00:54:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:40,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:54:40,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:40,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646187417] [2021-11-21 00:54:40,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646187417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:40,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:40,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:54:40,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199784023] [2021-11-21 00:54:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:40,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:54:40,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:54:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:54:41,000 INFO L87 Difference]: Start difference. First operand 19780 states and 31900 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-21 00:54:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:42,461 INFO L93 Difference]: Finished difference Result 39360 states and 65412 transitions. [2021-11-21 00:54:42,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:54:42,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 97 [2021-11-21 00:54:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:42,756 INFO L225 Difference]: With dead ends: 39360 [2021-11-21 00:54:42,757 INFO L226 Difference]: Without dead ends: 21670 [2021-11-21 00:54:42,889 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 [2021-11-21 00:54:42,891 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 216 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:42,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1513 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:54:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21670 states. [2021-11-21 00:54:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21670 to 21670. [2021-11-21 00:54:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21670 states, 15369 states have (on average 1.5308738369444987) internal successors, (23528), 16287 states have internal predecessors, (23528), 4864 states have call successors, (4864), 969 states have call predecessors, (4864), 1436 states have return successors, (6776), 4735 states have call predecessors, (6776), 4859 states have call successors, (6776) [2021-11-21 00:54:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21670 states to 21670 states and 35168 transitions. [2021-11-21 00:54:44,988 INFO L78 Accepts]: Start accepts. Automaton has 21670 states and 35168 transitions. Word has length 97 [2021-11-21 00:54:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:44,989 INFO L470 AbstractCegarLoop]: Abstraction has 21670 states and 35168 transitions. [2021-11-21 00:54:44,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-21 00:54:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 21670 states and 35168 transitions. [2021-11-21 00:54:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-21 00:54:44,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:44,995 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:44,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:54:44,996 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1095727475, now seen corresponding path program 1 times [2021-11-21 00:54:44,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:44,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111369724] [2021-11-21 00:54:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:44,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:45,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:54:45,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:45,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111369724] [2021-11-21 00:54:45,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111369724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:45,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:45,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:54:45,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655731692] [2021-11-21 00:54:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:45,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:54:45,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:45,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:54:45,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:54:45,147 INFO L87 Difference]: Start difference. First operand 21670 states and 35168 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:54:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:49,448 INFO L93 Difference]: Finished difference Result 62860 states and 103829 transitions. [2021-11-21 00:54:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:54:49,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2021-11-21 00:54:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:49,786 INFO L225 Difference]: With dead ends: 62860 [2021-11-21 00:54:49,786 INFO L226 Difference]: Without dead ends: 41208 [2021-11-21 00:54:49,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:54:49,933 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1150 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:49,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 978 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-21 00:54:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41208 states. [2021-11-21 00:54:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41208 to 39026. [2021-11-21 00:54:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39026 states, 27764 states have (on average 1.5291384526725256) internal successors, (42455), 29637 states have internal predecessors, (42455), 8524 states have call successors, (8524), 1797 states have call predecessors, (8524), 2737 states have return successors, (12870), 8144 states have call predecessors, (12870), 8519 states have call successors, (12870) [2021-11-21 00:54:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39026 states to 39026 states and 63849 transitions. [2021-11-21 00:54:53,767 INFO L78 Accepts]: Start accepts. Automaton has 39026 states and 63849 transitions. Word has length 97 [2021-11-21 00:54:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:54:53,771 INFO L470 AbstractCegarLoop]: Abstraction has 39026 states and 63849 transitions. [2021-11-21 00:54:53,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:54:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 39026 states and 63849 transitions. [2021-11-21 00:54:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-21 00:54:53,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:54:53,780 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:54:53,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:54:53,781 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:54:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:54:53,782 INFO L85 PathProgramCache]: Analyzing trace with hash 674975992, now seen corresponding path program 1 times [2021-11-21 00:54:53,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:54:53,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958554157] [2021-11-21 00:54:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:54:53,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:54:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:54:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:54:53,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:54:53,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958554157] [2021-11-21 00:54:53,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958554157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:54:53,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:54:53,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:54:53,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925621905] [2021-11-21 00:54:53,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:54:53,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:54:53,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:54:53,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:54:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:54:53,944 INFO L87 Difference]: Start difference. First operand 39026 states and 63849 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:55:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:00,378 INFO L93 Difference]: Finished difference Result 115184 states and 194117 transitions. [2021-11-21 00:55:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:55:00,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2021-11-21 00:55:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:01,323 INFO L225 Difference]: With dead ends: 115184 [2021-11-21 00:55:01,323 INFO L226 Difference]: Without dead ends: 76178 [2021-11-21 00:55:01,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:55:01,621 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 1137 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:01,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 987 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 00:55:01,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76178 states. [2021-11-21 00:55:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76178 to 74133. [2021-11-21 00:55:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74133 states, 52787 states have (on average 1.525015628848012) internal successors, (80501), 56648 states have internal predecessors, (80501), 15904 states have call successors, (15904), 3453 states have call predecessors, (15904), 5441 states have return successors, (26658), 15032 states have call predecessors, (26658), 15899 states have call successors, (26658) [2021-11-21 00:55:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74133 states to 74133 states and 123063 transitions. [2021-11-21 00:55:08,488 INFO L78 Accepts]: Start accepts. Automaton has 74133 states and 123063 transitions. Word has length 97 [2021-11-21 00:55:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:08,489 INFO L470 AbstractCegarLoop]: Abstraction has 74133 states and 123063 transitions. [2021-11-21 00:55:08,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:55:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 74133 states and 123063 transitions. [2021-11-21 00:55:08,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-21 00:55:08,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:08,499 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:55:08,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:55:08,499 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash 722697621, now seen corresponding path program 1 times [2021-11-21 00:55:08,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857883871] [2021-11-21 00:55:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:08,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:55:08,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:08,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857883871] [2021-11-21 00:55:08,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857883871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:08,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:08,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:55:08,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451606783] [2021-11-21 00:55:08,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:08,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:55:08,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:08,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:55:08,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:55:08,634 INFO L87 Difference]: Start difference. First operand 74133 states and 123063 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:55:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:20,650 INFO L93 Difference]: Finished difference Result 221069 states and 385272 transitions. [2021-11-21 00:55:20,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:55:20,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2021-11-21 00:55:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:21,797 INFO L225 Difference]: With dead ends: 221069 [2021-11-21 00:55:21,798 INFO L226 Difference]: Without dead ends: 146960 [2021-11-21 00:55:22,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:55:22,765 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1124 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:22,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1192 Valid, 999 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 00:55:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146960 states.