./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product19.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_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/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_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/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_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/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 d96f41c83679efe744540e7fde7918287d6cc79be28bb1ad9b63bf8e0d07ce19 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:32:32,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:32:32,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:32:32,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:32:32,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:32:32,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:32:32,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:32:32,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:32:32,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:32:32,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:32:32,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:32:32,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:32:32,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:32:32,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:32:32,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:32:32,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:32:32,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:32:32,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:32:32,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:32:32,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:32:32,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:32:32,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:32:32,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:32:32,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:32:32,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:32:32,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:32:32,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:32:32,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:32:32,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:32:32,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:32:32,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:32:32,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:32:32,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:32:32,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:32:32,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:32:32,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:32:32,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:32:32,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:32:32,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:32:32,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:32:32,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:32:32,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:32:32,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:32:32,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:32:32,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:32:32,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:32:32,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:32:32,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:32:32,433 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:32:32,434 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:32:32,434 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:32:32,434 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:32:32,434 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:32:32,434 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:32:32,434 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:32:32,435 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:32:32,435 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:32:32,435 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:32:32,435 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:32:32,435 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:32:32,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:32:32,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:32:32,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:32:32,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:32:32,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:32:32,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:32:32,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:32:32,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:32:32,437 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:32:32,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:32:32,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:32:32,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:32:32,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:32:32,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:32:32,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:32,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:32:32,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:32:32,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:32:32,439 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:32:32,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:32:32,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:32:32,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:32:32,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:32:32,440 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_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d96f41c83679efe744540e7fde7918287d6cc79be28bb1ad9b63bf8e0d07ce19 [2021-11-20 23:32:32,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:32:32,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:32:32,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:32:32,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:32:32,702 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:32:32,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec2_product19.cil.c [2021-11-20 23:32:32,781 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/data/e00a894dd/82e9169824454a288cb636e47ad62e60/FLAG867771fa6 [2021-11-20 23:32:33,424 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:32:33,425 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/sv-benchmarks/c/product-lines/elevator_spec2_product19.cil.c [2021-11-20 23:32:33,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/data/e00a894dd/82e9169824454a288cb636e47ad62e60/FLAG867771fa6 [2021-11-20 23:32:33,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/data/e00a894dd/82e9169824454a288cb636e47ad62e60 [2021-11-20 23:32:33,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:32:33,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:32:33,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:33,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:32:33,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:32:33,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:33" (1/1) ... [2021-11-20 23:32:33,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce54e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:33, skipping insertion in model container [2021-11-20 23:32:33,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:33" (1/1) ... [2021-11-20 23:32:33,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:32:33,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:32:34,132 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_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/sv-benchmarks/c/product-lines/elevator_spec2_product19.cil.c[34453,34466] [2021-11-20 23:32:34,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:34,250 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:32:34,306 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_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/sv-benchmarks/c/product-lines/elevator_spec2_product19.cil.c[34453,34466] [2021-11-20 23:32:34,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:32:34,379 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:32:34,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34 WrapperNode [2021-11-20 23:32:34,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:32:34,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:34,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:32:34,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:32:34,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,477 INFO L137 Inliner]: procedures = 94, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1119 [2021-11-20 23:32:34,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:32:34,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:32:34,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:32:34,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:32:34,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:32:34,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:32:34,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:32:34,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:32:34,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (1/1) ... [2021-11-20 23:32:34,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:32:34,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:34,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:32:34,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:32:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:32:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 23:32:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 23:32:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 23:32:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 23:32:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-20 23:32:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-20 23:32:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 23:32:34,745 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 23:32:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-20 23:32:34,745 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-20 23:32:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 23:32:34,745 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 23:32:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 23:32:34,746 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 23:32:34,746 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 23:32:34,746 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 23:32:34,746 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 23:32:34,746 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 23:32:34,746 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 23:32:34,747 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 23:32:34,747 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 23:32:34,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 23:32:34,747 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 23:32:34,747 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 23:32:34,747 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 23:32:34,748 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 23:32:34,748 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 23:32:34,748 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 23:32:34,748 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-20 23:32:34,748 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-20 23:32:34,748 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 23:32:34,749 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 23:32:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 23:32:34,749 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 23:32:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 23:32:34,749 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 23:32:34,749 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 23:32:34,750 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 23:32:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 23:32:34,750 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 23:32:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:32:34,750 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 23:32:34,750 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 23:32:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 23:32:34,751 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 23:32:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 23:32:34,751 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 23:32:34,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:32:34,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:32:34,752 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 23:32:34,752 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 23:32:34,949 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:32:34,951 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:32:36,021 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:32:36,684 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:32:36,684 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:32:36,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:36 BoogieIcfgContainer [2021-11-20 23:32:36,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:32:36,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:32:36,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:32:36,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:32:36,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:32:33" (1/3) ... [2021-11-20 23:32:36,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e99d1e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:36, skipping insertion in model container [2021-11-20 23:32:36,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:34" (2/3) ... [2021-11-20 23:32:36,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e99d1e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:36, skipping insertion in model container [2021-11-20 23:32:36,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:36" (3/3) ... [2021-11-20 23:32:36,740 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product19.cil.c [2021-11-20 23:32:36,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:32:36,747 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:32:36,806 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:32:36,816 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 [2021-11-20 23:32:36,816 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:32:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-20 23:32:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 23:32:36,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:36,897 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:36,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:36,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1047114643, now seen corresponding path program 1 times [2021-11-20 23:32:36,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:36,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218174601] [2021-11-20 23:32:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:36,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:32:37,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:37,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218174601] [2021-11-20 23:32:37,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218174601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:37,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:37,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:32:37,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911559514] [2021-11-20 23:32:37,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:37,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:32:37,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:32:37,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:32:37,440 INFO L87 Difference]: Start difference. First operand has 374 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 23:32:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:37,569 INFO L93 Difference]: Finished difference Result 392 states and 621 transitions. [2021-11-20 23:32:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:32:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2021-11-20 23:32:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:37,591 INFO L225 Difference]: With dead ends: 392 [2021-11-20 23:32:37,591 INFO L226 Difference]: Without dead ends: 370 [2021-11-20 23:32:37,595 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 [2021-11-20 23:32:37,598 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:37,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 551 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:32:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-20 23:32:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-11-20 23:32:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 250 states have (on average 1.584) internal successors, (396), 269 states have internal predecessors, (396), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-20 23:32:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 583 transitions. [2021-11-20 23:32:37,701 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 583 transitions. Word has length 77 [2021-11-20 23:32:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:37,702 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 583 transitions. [2021-11-20 23:32:37,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 23:32:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 583 transitions. [2021-11-20 23:32:37,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-20 23:32:37,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:37,722 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:37,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:32:37,723 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:37,724 INFO L85 PathProgramCache]: Analyzing trace with hash 443333432, now seen corresponding path program 1 times [2021-11-20 23:32:37,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:37,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875195114] [2021-11-20 23:32:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:37,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:32:37,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:37,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875195114] [2021-11-20 23:32:37,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875195114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:37,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:37,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:32:37,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234283165] [2021-11-20 23:32:37,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:37,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:32:37,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:32:37,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:32:37,986 INFO L87 Difference]: Start difference. First operand 370 states and 583 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 23:32:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:40,301 INFO L93 Difference]: Finished difference Result 1141 states and 1828 transitions. [2021-11-20 23:32:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:32:40,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2021-11-20 23:32:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:40,310 INFO L225 Difference]: With dead ends: 1141 [2021-11-20 23:32:40,310 INFO L226 Difference]: Without dead ends: 787 [2021-11-20 23:32:40,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:32:40,316 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 1128 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:40,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 1883 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 23:32:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-11-20 23:32:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 738. [2021-11-20 23:32:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 507 states have (on average 1.5956607495069033) internal successors, (809), 540 states have internal predecessors, (809), 186 states have call successors, (186), 44 states have call predecessors, (186), 44 states have return successors, (187), 178 states have call predecessors, (187), 181 states have call successors, (187) [2021-11-20 23:32:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1182 transitions. [2021-11-20 23:32:40,465 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1182 transitions. Word has length 78 [2021-11-20 23:32:40,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:40,465 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1182 transitions. [2021-11-20 23:32:40,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-20 23:32:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1182 transitions. [2021-11-20 23:32:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-20 23:32:40,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:40,469 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:40,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:32:40,470 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:40,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1605655976, now seen corresponding path program 1 times [2021-11-20 23:32:40,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:40,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422337854] [2021-11-20 23:32:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:40,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:32:40,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:40,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422337854] [2021-11-20 23:32:40,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422337854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:40,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:40,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:32:40,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20309520] [2021-11-20 23:32:40,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:40,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:32:40,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:32:40,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:32:40,644 INFO L87 Difference]: Start difference. First operand 738 states and 1182 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:41,795 INFO L93 Difference]: Finished difference Result 2373 states and 3867 transitions. [2021-11-20 23:32:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:32:41,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 82 [2021-11-20 23:32:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:41,831 INFO L225 Difference]: With dead ends: 2373 [2021-11-20 23:32:41,832 INFO L226 Difference]: Without dead ends: 1651 [2021-11-20 23:32:41,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:32:41,844 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 1147 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:41,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 945 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:32:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-11-20 23:32:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1485. [2021-11-20 23:32:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1043 states have (on average 1.6059443911792906) internal successors, (1675), 1106 states have internal predecessors, (1675), 357 states have call successors, (357), 79 states have call predecessors, (357), 84 states have return successors, (375), 335 states have call predecessors, (375), 352 states have call successors, (375) [2021-11-20 23:32:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2407 transitions. [2021-11-20 23:32:41,986 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2407 transitions. Word has length 82 [2021-11-20 23:32:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:41,988 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 2407 transitions. [2021-11-20 23:32:41,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2407 transitions. [2021-11-20 23:32:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 23:32:41,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:41,995 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:41,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:32:41,996 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1764133865, now seen corresponding path program 1 times [2021-11-20 23:32:41,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:41,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617631595] [2021-11-20 23:32:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:41,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:32:42,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:42,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617631595] [2021-11-20 23:32:42,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617631595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:42,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:42,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:32:42,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713191225] [2021-11-20 23:32:42,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:42,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:32:42,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:42,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:32:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:32:42,155 INFO L87 Difference]: Start difference. First operand 1485 states and 2407 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:43,434 INFO L93 Difference]: Finished difference Result 4548 states and 7489 transitions. [2021-11-20 23:32:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:32:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 83 [2021-11-20 23:32:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:43,462 INFO L225 Difference]: With dead ends: 4548 [2021-11-20 23:32:43,462 INFO L226 Difference]: Without dead ends: 3080 [2021-11-20 23:32:43,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:32:43,473 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 1138 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:43,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 949 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 23:32:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-11-20 23:32:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 2867. [2021-11-20 23:32:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2037 states have (on average 1.6131566028473245) internal successors, (3286), 2167 states have internal predecessors, (3286), 662 states have call successors, (662), 149 states have call predecessors, (662), 167 states have return successors, (740), 612 states have call predecessors, (740), 657 states have call successors, (740) [2021-11-20 23:32:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 4688 transitions. [2021-11-20 23:32:43,739 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 4688 transitions. Word has length 83 [2021-11-20 23:32:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:43,740 INFO L470 AbstractCegarLoop]: Abstraction has 2867 states and 4688 transitions. [2021-11-20 23:32:43,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 4688 transitions. [2021-11-20 23:32:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 23:32:43,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:43,744 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:43,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:32:43,745 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:43,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1146559558, now seen corresponding path program 1 times [2021-11-20 23:32:43,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:43,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966343767] [2021-11-20 23:32:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:43,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:32:43,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:43,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966343767] [2021-11-20 23:32:43,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966343767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:43,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:43,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:32:43,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763351067] [2021-11-20 23:32:43,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:43,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:32:43,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:32:43,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:32:43,850 INFO L87 Difference]: Start difference. First operand 2867 states and 4688 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:45,271 INFO L93 Difference]: Finished difference Result 8740 states and 14609 transitions. [2021-11-20 23:32:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:32:45,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2021-11-20 23:32:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:45,328 INFO L225 Difference]: With dead ends: 8740 [2021-11-20 23:32:45,328 INFO L226 Difference]: Without dead ends: 5892 [2021-11-20 23:32:45,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:32:45,350 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 1121 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:45,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 962 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:32:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-11-20 23:32:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5576. [2021-11-20 23:32:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 3980 states have (on average 1.6135678391959798) internal successors, (6422), 4250 states have internal predecessors, (6422), 1256 states have call successors, (1256), 289 states have call predecessors, (1256), 339 states have return successors, (1546), 1150 states have call predecessors, (1546), 1251 states have call successors, (1546) [2021-11-20 23:32:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 9224 transitions. [2021-11-20 23:32:45,820 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 9224 transitions. Word has length 84 [2021-11-20 23:32:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:45,821 INFO L470 AbstractCegarLoop]: Abstraction has 5576 states and 9224 transitions. [2021-11-20 23:32:45,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 9224 transitions. [2021-11-20 23:32:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 23:32:45,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:45,825 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:45,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:32:45,826 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:45,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1183738549, now seen corresponding path program 1 times [2021-11-20 23:32:45,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:45,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511071590] [2021-11-20 23:32:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:45,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:32:45,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:45,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511071590] [2021-11-20 23:32:45,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511071590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:45,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:45,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:32:45,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824127459] [2021-11-20 23:32:45,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:45,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:32:45,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:32:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:32:45,969 INFO L87 Difference]: Start difference. First operand 5576 states and 9224 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:47,725 INFO L93 Difference]: Finished difference Result 16977 states and 29136 transitions. [2021-11-20 23:32:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:32:47,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 85 [2021-11-20 23:32:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:47,853 INFO L225 Difference]: With dead ends: 16977 [2021-11-20 23:32:47,854 INFO L226 Difference]: Without dead ends: 11424 [2021-11-20 23:32:47,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:32:47,899 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 1108 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:47,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1177 Valid, 974 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 23:32:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11424 states. [2021-11-20 23:32:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11424 to 10893. [2021-11-20 23:32:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10893 states, 7783 states have (on average 1.6104329949890788) internal successors, (12534), 8345 states have internal predecessors, (12534), 2414 states have call successors, (2414), 569 states have call predecessors, (2414), 695 states have return successors, (3456), 2196 states have call predecessors, (3456), 2409 states have call successors, (3456) [2021-11-20 23:32:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10893 states to 10893 states and 18404 transitions. [2021-11-20 23:32:48,880 INFO L78 Accepts]: Start accepts. Automaton has 10893 states and 18404 transitions. Word has length 85 [2021-11-20 23:32:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:48,881 INFO L470 AbstractCegarLoop]: Abstraction has 10893 states and 18404 transitions. [2021-11-20 23:32:48,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 10893 states and 18404 transitions. [2021-11-20 23:32:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 23:32:48,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:48,885 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:48,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:32:48,885 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1958683932, now seen corresponding path program 1 times [2021-11-20 23:32:48,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:48,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877075044] [2021-11-20 23:32:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:48,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:32:48,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:48,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877075044] [2021-11-20 23:32:48,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877075044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:48,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:48,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:32:48,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909904276] [2021-11-20 23:32:48,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:48,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:32:48,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:32:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:32:48,980 INFO L87 Difference]: Start difference. First operand 10893 states and 18404 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:51,431 INFO L93 Difference]: Finished difference Result 33242 states and 59896 transitions. [2021-11-20 23:32:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:32:51,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2021-11-20 23:32:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:51,714 INFO L225 Difference]: With dead ends: 33242 [2021-11-20 23:32:51,714 INFO L226 Difference]: Without dead ends: 22370 [2021-11-20 23:32:51,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:32:51,790 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 1099 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:51,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1167 Valid, 989 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 23:32:51,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22370 states. [2021-11-20 23:32:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22370 to 21302. [2021-11-20 23:32:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21302 states, 15249 states have (on average 1.6089579644566856) internal successors, (24535), 16373 states have internal predecessors, (24535), 4670 states have call successors, (4670), 1127 states have call predecessors, (4670), 1382 states have return successors, (8107), 4227 states have call predecessors, (8107), 4665 states have call successors, (8107) [2021-11-20 23:32:53,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21302 states to 21302 states and 37312 transitions. [2021-11-20 23:32:53,832 INFO L78 Accepts]: Start accepts. Automaton has 21302 states and 37312 transitions. Word has length 86 [2021-11-20 23:32:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:53,834 INFO L470 AbstractCegarLoop]: Abstraction has 21302 states and 37312 transitions. [2021-11-20 23:32:53,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-20 23:32:53,834 INFO L276 IsEmpty]: Start isEmpty. Operand 21302 states and 37312 transitions. [2021-11-20 23:32:53,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 23:32:53,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:53,842 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:53,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:32:53,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash 465564136, now seen corresponding path program 1 times [2021-11-20 23:32:53,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:53,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924693079] [2021-11-20 23:32:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:53,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-20 23:32:53,960 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:53,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924693079] [2021-11-20 23:32:53,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924693079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:53,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:32:53,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:32:53,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741138008] [2021-11-20 23:32:53,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:53,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:32:53,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:32:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:32:53,963 INFO L87 Difference]: Start difference. First operand 21302 states and 37312 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 23:32:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:32:55,669 INFO L93 Difference]: Finished difference Result 45863 states and 83603 transitions. [2021-11-20 23:32:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:32:55,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 134 [2021-11-20 23:32:55,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:32:55,825 INFO L225 Difference]: With dead ends: 45863 [2021-11-20 23:32:55,825 INFO L226 Difference]: Without dead ends: 24578 [2021-11-20 23:32:55,918 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 [2021-11-20 23:32:55,918 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 118 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:32:55,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1740 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:32:55,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24578 states. [2021-11-20 23:32:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24578 to 21542. [2021-11-20 23:32:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21542 states, 15472 states have (on average 1.6032187176835575) internal successors, (24805), 16580 states have internal predecessors, (24805), 4687 states have call successors, (4687), 1127 states have call predecessors, (4687), 1382 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-20 23:32:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21542 states to 21542 states and 37616 transitions. [2021-11-20 23:32:57,752 INFO L78 Accepts]: Start accepts. Automaton has 21542 states and 37616 transitions. Word has length 134 [2021-11-20 23:32:57,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:32:57,752 INFO L470 AbstractCegarLoop]: Abstraction has 21542 states and 37616 transitions. [2021-11-20 23:32:57,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-20 23:32:57,753 INFO L276 IsEmpty]: Start isEmpty. Operand 21542 states and 37616 transitions. [2021-11-20 23:32:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 23:32:57,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:32:57,760 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:32:57,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:32:57,761 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:32:57,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:32:57,761 INFO L85 PathProgramCache]: Analyzing trace with hash 639097028, now seen corresponding path program 1 times [2021-11-20 23:32:57,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:32:57,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113756689] [2021-11-20 23:32:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:57,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:32:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 23:32:57,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:32:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113756689] [2021-11-20 23:32:57,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113756689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:32:57,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940726382] [2021-11-20 23:32:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:32:57,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:32:57,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:32:57,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:32:57,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:32:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:32:58,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:32:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:32:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 23:32:58,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:32:58,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940726382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:32:58,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:32:58,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-20 23:32:58,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535296735] [2021-11-20 23:32:58,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:32:58,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:32:58,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:32:58,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:32:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:32:58,694 INFO L87 Difference]: Start difference. First operand 21542 states and 37616 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:33:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:00,400 INFO L93 Difference]: Finished difference Result 45563 states and 82818 transitions. [2021-11-20 23:33:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:33:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 137 [2021-11-20 23:33:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:00,565 INFO L225 Difference]: With dead ends: 45563 [2021-11-20 23:33:00,565 INFO L226 Difference]: Without dead ends: 24038 [2021-11-20 23:33:00,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:33:00,682 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 213 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:00,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1422 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:33:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24038 states. [2021-11-20 23:33:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24038 to 24038. [2021-11-20 23:33:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24038 states, 17904 states have (on average 1.6463918677390528) internal successors, (29477), 19012 states have internal predecessors, (29477), 4687 states have call successors, (4687), 1191 states have call predecessors, (4687), 1446 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-20 23:33:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24038 states to 24038 states and 42288 transitions. [2021-11-20 23:33:02,443 INFO L78 Accepts]: Start accepts. Automaton has 24038 states and 42288 transitions. Word has length 137 [2021-11-20 23:33:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:02,444 INFO L470 AbstractCegarLoop]: Abstraction has 24038 states and 42288 transitions. [2021-11-20 23:33:02,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:33:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 24038 states and 42288 transitions. [2021-11-20 23:33:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 23:33:02,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:02,453 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:02,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:02,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 23:33:02,669 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:02,670 INFO L85 PathProgramCache]: Analyzing trace with hash 637244414, now seen corresponding path program 1 times [2021-11-20 23:33:02,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:02,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927098030] [2021-11-20 23:33:02,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:02,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 23:33:02,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:02,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927098030] [2021-11-20 23:33:02,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927098030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:02,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760541032] [2021-11-20 23:33:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:02,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:02,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:02,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:02,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:33:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:03,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:33:03,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 23:33:03,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:03,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760541032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:03,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:33:03,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-20 23:33:03,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995600755] [2021-11-20 23:33:03,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:03,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:03,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:33:03,465 INFO L87 Difference]: Start difference. First operand 24038 states and 42288 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:33:05,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:05,056 INFO L93 Difference]: Finished difference Result 50555 states and 92096 transitions. [2021-11-20 23:33:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:33:05,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2021-11-20 23:33:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:05,208 INFO L225 Difference]: With dead ends: 50555 [2021-11-20 23:33:05,208 INFO L226 Difference]: Without dead ends: 26534 [2021-11-20 23:33:05,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:33:05,301 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 211 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:05,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1422 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:33:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26534 states. [2021-11-20 23:33:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26534 to 26534. [2021-11-20 23:33:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26534 states, 20336 states have (on average 1.6792387883556255) internal successors, (34149), 21444 states have internal predecessors, (34149), 4687 states have call successors, (4687), 1255 states have call predecessors, (4687), 1510 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-20 23:33:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26534 states to 26534 states and 46960 transitions. [2021-11-20 23:33:07,063 INFO L78 Accepts]: Start accepts. Automaton has 26534 states and 46960 transitions. Word has length 142 [2021-11-20 23:33:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:07,064 INFO L470 AbstractCegarLoop]: Abstraction has 26534 states and 46960 transitions. [2021-11-20 23:33:07,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:33:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 26534 states and 46960 transitions. [2021-11-20 23:33:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 23:33:07,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:07,072 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:07,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:07,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 23:33:07,289 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:07,290 INFO L85 PathProgramCache]: Analyzing trace with hash -703648722, now seen corresponding path program 1 times [2021-11-20 23:33:07,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:07,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997926366] [2021-11-20 23:33:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:07,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-20 23:33:07,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:07,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997926366] [2021-11-20 23:33:07,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997926366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:07,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669587311] [2021-11-20 23:33:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:07,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:07,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:07,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:07,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:33:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:33:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 23:33:08,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:08,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669587311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:08,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:33:08,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2021-11-20 23:33:08,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669094241] [2021-11-20 23:33:08,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:08,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:08,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:33:08,335 INFO L87 Difference]: Start difference. First operand 26534 states and 46960 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:33:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:09,797 INFO L93 Difference]: Finished difference Result 55547 states and 101374 transitions. [2021-11-20 23:33:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:33:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2021-11-20 23:33:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:09,929 INFO L225 Difference]: With dead ends: 55547 [2021-11-20 23:33:09,929 INFO L226 Difference]: Without dead ends: 29030 [2021-11-20 23:33:10,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:33:10,022 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 209 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:10,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1422 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:33:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29030 states. [2021-11-20 23:33:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29030 to 29030. [2021-11-20 23:33:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29030 states, 22768 states have (on average 1.705068517217147) internal successors, (38821), 23876 states have internal predecessors, (38821), 4687 states have call successors, (4687), 1319 states have call predecessors, (4687), 1574 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-20 23:33:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29030 states to 29030 states and 51632 transitions. [2021-11-20 23:33:11,466 INFO L78 Accepts]: Start accepts. Automaton has 29030 states and 51632 transitions. Word has length 146 [2021-11-20 23:33:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:11,466 INFO L470 AbstractCegarLoop]: Abstraction has 29030 states and 51632 transitions. [2021-11-20 23:33:11,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:33:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 29030 states and 51632 transitions. [2021-11-20 23:33:11,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-20 23:33:11,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:11,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:11,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:11,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 23:33:11,697 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash 175250002, now seen corresponding path program 1 times [2021-11-20 23:33:11,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804517307] [2021-11-20 23:33:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:11,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 23:33:12,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:12,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804517307] [2021-11-20 23:33:12,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804517307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:12,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037470665] [2021-11-20 23:33:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:12,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:12,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:12,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:12,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:33:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:33:12,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 23:33:12,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:12,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037470665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:12,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:33:12,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2021-11-20 23:33:12,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499548735] [2021-11-20 23:33:12,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:12,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:12,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:12,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:12,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:33:12,690 INFO L87 Difference]: Start difference. First operand 29030 states and 51632 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:33:13,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:13,956 INFO L93 Difference]: Finished difference Result 60539 states and 110652 transitions. [2021-11-20 23:33:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:33:13,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 149 [2021-11-20 23:33:13,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:14,120 INFO L225 Difference]: With dead ends: 60539 [2021-11-20 23:33:14,120 INFO L226 Difference]: Without dead ends: 31526 [2021-11-20 23:33:14,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:33:14,239 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 207 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:14,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1422 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:33:14,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31526 states. [2021-11-20 23:33:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31526 to 31526. [2021-11-20 23:33:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31526 states, 25200 states have (on average 1.7259126984126985) internal successors, (43493), 26308 states have internal predecessors, (43493), 4687 states have call successors, (4687), 1383 states have call predecessors, (4687), 1638 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-20 23:33:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31526 states to 31526 states and 56304 transitions. [2021-11-20 23:33:15,721 INFO L78 Accepts]: Start accepts. Automaton has 31526 states and 56304 transitions. Word has length 149 [2021-11-20 23:33:15,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:15,722 INFO L470 AbstractCegarLoop]: Abstraction has 31526 states and 56304 transitions. [2021-11-20 23:33:15,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:33:15,723 INFO L276 IsEmpty]: Start isEmpty. Operand 31526 states and 56304 transitions. [2021-11-20 23:33:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-20 23:33:15,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:15,730 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:15,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:15,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:15,933 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:15,933 INFO L85 PathProgramCache]: Analyzing trace with hash 34547200, now seen corresponding path program 1 times [2021-11-20 23:33:15,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:15,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694394022] [2021-11-20 23:33:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:15,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 23:33:16,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:16,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694394022] [2021-11-20 23:33:16,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694394022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:16,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742149198] [2021-11-20 23:33:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:16,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:16,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:16,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:16,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:33:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 23:33:16,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-20 23:33:17,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:17,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742149198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:17,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:33:17,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 21 [2021-11-20 23:33:17,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344828113] [2021-11-20 23:33:17,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:17,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:17,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:17,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:33:17,087 INFO L87 Difference]: Start difference. First operand 31526 states and 56304 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-20 23:33:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:18,351 INFO L93 Difference]: Finished difference Result 32667 states and 59732 transitions. [2021-11-20 23:33:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:33:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) Word has length 151 [2021-11-20 23:33:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:18,522 INFO L225 Difference]: With dead ends: 32667 [2021-11-20 23:33:18,522 INFO L226 Difference]: Without dead ends: 32510 [2021-11-20 23:33:18,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:33:18,546 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 524 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:18,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 904 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:33:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32510 states. [2021-11-20 23:33:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32510 to 31588. [2021-11-20 23:33:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31588 states, 25262 states have (on average 1.7241311060090254) internal successors, (43555), 26370 states have internal predecessors, (43555), 4687 states have call successors, (4687), 1383 states have call predecessors, (4687), 1638 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-20 23:33:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31588 states to 31588 states and 56366 transitions. [2021-11-20 23:33:20,239 INFO L78 Accepts]: Start accepts. Automaton has 31588 states and 56366 transitions. Word has length 151 [2021-11-20 23:33:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:20,240 INFO L470 AbstractCegarLoop]: Abstraction has 31588 states and 56366 transitions. [2021-11-20 23:33:20,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-20 23:33:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 31588 states and 56366 transitions. [2021-11-20 23:33:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 23:33:20,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:20,247 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:20,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:33:20,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:20,473 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:20,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2070953598, now seen corresponding path program 1 times [2021-11-20 23:33:20,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:20,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984219630] [2021-11-20 23:33:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:20,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-20 23:33:20,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:20,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984219630] [2021-11-20 23:33:20,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984219630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:20,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207813755] [2021-11-20 23:33:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:20,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:20,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:20,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:20,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:33:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:21,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:33:21,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-20 23:33:21,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:21,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207813755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:21,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:33:21,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2021-11-20 23:33:21,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056274356] [2021-11-20 23:33:21,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:21,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:33:21,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:33:21,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:33:21,399 INFO L87 Difference]: Start difference. First operand 31588 states and 56366 transitions. Second operand has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-20 23:33:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:22,419 INFO L93 Difference]: Finished difference Result 31815 states and 56651 transitions. [2021-11-20 23:33:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:33:22,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) Word has length 156 [2021-11-20 23:33:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:22,543 INFO L225 Difference]: With dead ends: 31815 [2021-11-20 23:33:22,544 INFO L226 Difference]: Without dead ends: 31658 [2021-11-20 23:33:22,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-20 23:33:22,563 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 30 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:22,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2164 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:33:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31658 states. [2021-11-20 23:33:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31658 to 31588. [2021-11-20 23:33:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31588 states, 25262 states have (on average 1.7216768268545641) internal successors, (43493), 26370 states have internal predecessors, (43493), 4687 states have call successors, (4687), 1383 states have call predecessors, (4687), 1638 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-20 23:33:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31588 states to 31588 states and 56304 transitions. [2021-11-20 23:33:23,954 INFO L78 Accepts]: Start accepts. Automaton has 31588 states and 56304 transitions. Word has length 156 [2021-11-20 23:33:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:23,954 INFO L470 AbstractCegarLoop]: Abstraction has 31588 states and 56304 transitions. [2021-11-20 23:33:23,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 3 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-20 23:33:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 31588 states and 56304 transitions. [2021-11-20 23:33:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-20 23:33:23,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:23,966 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:24,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 23:33:24,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 23:33:24,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash 527246378, now seen corresponding path program 1 times [2021-11-20 23:33:24,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:24,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674199848] [2021-11-20 23:33:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:24,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 23:33:24,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:24,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674199848] [2021-11-20 23:33:24,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674199848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:24,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653142961] [2021-11-20 23:33:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:24,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:24,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:24,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:24,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:33:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:24,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:33:24,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-20 23:33:25,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:33:25,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653142961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:33:25,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:33:25,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2021-11-20 23:33:25,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750755658] [2021-11-20 23:33:25,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:33:25,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:33:25,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:33:25,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:33:25,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:33:25,237 INFO L87 Difference]: Start difference. First operand 31588 states and 56304 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-20 23:33:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:33:26,840 INFO L93 Difference]: Finished difference Result 33208 states and 61947 transitions. [2021-11-20 23:33:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:33:26,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 163 [2021-11-20 23:33:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:33:27,001 INFO L225 Difference]: With dead ends: 33208 [2021-11-20 23:33:27,001 INFO L226 Difference]: Without dead ends: 33051 [2021-11-20 23:33:27,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:33:27,018 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 44 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:33:27,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1702 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:33:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33051 states. [2021-11-20 23:33:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33051 to 31712. [2021-11-20 23:33:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31712 states, 25386 states have (on average 1.7181517371779722) internal successors, (43617), 26494 states have internal predecessors, (43617), 4687 states have call successors, (4687), 1383 states have call predecessors, (4687), 1638 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2021-11-20 23:33:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31712 states to 31712 states and 56428 transitions. [2021-11-20 23:33:28,550 INFO L78 Accepts]: Start accepts. Automaton has 31712 states and 56428 transitions. Word has length 163 [2021-11-20 23:33:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:33:28,567 INFO L470 AbstractCegarLoop]: Abstraction has 31712 states and 56428 transitions. [2021-11-20 23:33:28,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-20 23:33:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 31712 states and 56428 transitions. [2021-11-20 23:33:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-20 23:33:28,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:33:28,595 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:33:28,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 23:33:28,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 23:33:28,810 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:33:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:33:28,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1539602135, now seen corresponding path program 1 times [2021-11-20 23:33:28,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:33:28,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516117858] [2021-11-20 23:33:28,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:28,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:33:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 23:33:29,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:33:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516117858] [2021-11-20 23:33:29,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516117858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:33:29,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902654798] [2021-11-20 23:33:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:33:29,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:33:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:33:29,106 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:33:29,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e21da3-3bde-4b8c-ad9d-45d88b4efa30/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:33:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:33:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 23:33:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:33:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-20 23:33:30,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:33:33,813 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2021-11-20 23:33:40,584 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2021-11-20 23:33:40,948 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2021-11-20 23:33:47,323 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2021-11-20 23:33:47,739 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time...