./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.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_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/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_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/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_4d80931c-1d9e-40a3-8149-8d2a4309de04/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 c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:19:45,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:19:45,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:19:45,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:19:45,358 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:19:45,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:19:45,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:19:45,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:19:45,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:19:45,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:19:45,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:19:45,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:19:45,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:19:45,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:19:45,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:19:45,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:19:45,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:19:45,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:19:45,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:19:45,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:19:45,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:19:45,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:19:45,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:19:45,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:19:45,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:19:45,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:19:45,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:19:45,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:19:45,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:19:45,431 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:19:45,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:19:45,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:19:45,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:19:45,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:19:45,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:19:45,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:19:45,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:19:45,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:19:45,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:19:45,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:19:45,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:19:45,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:19:45,492 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:19:45,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:19:45,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:19:45,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:19:45,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:19:45,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:19:45,501 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:19:45,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:19:45,501 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:19:45,502 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:19:45,503 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:19:45,503 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:19:45,504 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:19:45,504 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:19:45,504 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:19:45,504 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:19:45,505 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:19:45,505 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:19:45,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:19:45,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:19:45,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:19:45,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:19:45,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:19:45,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:19:45,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:19:45,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:19:45,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:19:45,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:19:45,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:19:45,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:19:45,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:19:45,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:19:45,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:19:45,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:19:45,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:19:45,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:19:45,510 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:19:45,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:19:45,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:19:45,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:19:45,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:19:45,511 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_4d80931c-1d9e-40a3-8149-8d2a4309de04/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-20 23:19:45,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:19:45,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:19:45,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:19:45,795 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:19:45,795 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:19:45,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-20 23:19:45,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/data/56105765c/72ff8e5e3ec245d4b3e96f3ef72f8541/FLAG0a2cc9fc1 [2021-11-20 23:19:46,585 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:19:46,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-20 23:19:46,613 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/data/56105765c/72ff8e5e3ec245d4b3e96f3ef72f8541/FLAG0a2cc9fc1 [2021-11-20 23:19:46,749 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/data/56105765c/72ff8e5e3ec245d4b3e96f3ef72f8541 [2021-11-20 23:19:46,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:19:46,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:19:46,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:19:46,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:19:46,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:19:46,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:19:46" (1/1) ... [2021-11-20 23:19:46,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54744e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:46, skipping insertion in model container [2021-11-20 23:19:46,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:19:46" (1/1) ... [2021-11-20 23:19:46,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:19:46,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:19:47,088 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_4d80931c-1d9e-40a3-8149-8d2a4309de04/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-20 23:19:47,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:19:47,424 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:19:47,439 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_4d80931c-1d9e-40a3-8149-8d2a4309de04/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-20 23:19:47,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:19:47,562 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:19:47,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47 WrapperNode [2021-11-20 23:19:47,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:19:47,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:19:47,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:19:47,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:19:47,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,651 INFO L137 Inliner]: procedures = 93, calls = 342, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 894 [2021-11-20 23:19:47,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:19:47,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:19:47,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:19:47,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:19:47,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,756 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:19:47,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:19:47,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:19:47,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:19:47,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (1/1) ... [2021-11-20 23:19:47,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:19:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:19:47,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:19:47,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:19:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-20 23:19:47,853 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-20 23:19:47,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:19:47,853 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-20 23:19:47,853 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-20 23:19:47,853 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-20 23:19:47,853 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-20 23:19:47,854 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-20 23:19:47,854 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-20 23:19:47,854 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-20 23:19:47,854 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-20 23:19:47,854 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-20 23:19:47,854 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-20 23:19:47,855 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-20 23:19:47,855 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-20 23:19:47,855 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-20 23:19:47,855 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-20 23:19:47,855 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-20 23:19:47,856 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-20 23:19:47,856 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-20 23:19:47,856 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-20 23:19:47,856 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-20 23:19:47,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-20 23:19:47,856 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-20 23:19:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-20 23:19:47,857 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-20 23:19:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-20 23:19:47,857 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-20 23:19:47,857 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-20 23:19:47,857 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-20 23:19:47,858 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-20 23:19:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-20 23:19:47,858 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-20 23:19:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-20 23:19:47,858 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-20 23:19:47,858 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-20 23:19:47,859 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-20 23:19:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-20 23:19:47,859 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-20 23:19:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-20 23:19:47,859 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-20 23:19:47,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:19:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-20 23:19:47,860 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-20 23:19:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-20 23:19:47,860 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-20 23:19:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-20 23:19:47,861 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-20 23:19:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-20 23:19:47,861 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-20 23:19:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:19:47,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:19:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-20 23:19:47,862 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-20 23:19:48,002 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:19:48,004 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:19:49,040 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:19:49,742 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:19:49,743 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:19:49,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:19:49 BoogieIcfgContainer [2021-11-20 23:19:49,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:19:49,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:19:49,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:19:49,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:19:49,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:19:46" (1/3) ... [2021-11-20 23:19:49,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aee52e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:19:49, skipping insertion in model container [2021-11-20 23:19:49,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:19:47" (2/3) ... [2021-11-20 23:19:49,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aee52e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:19:49, skipping insertion in model container [2021-11-20 23:19:49,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:19:49" (3/3) ... [2021-11-20 23:19:49,755 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2021-11-20 23:19:49,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:19:49,761 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:19:49,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:19:49,820 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 23:19:49,820 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:19:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-20 23:19:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 23:19:49,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:49,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:49,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:49,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1730455560, now seen corresponding path program 1 times [2021-11-20 23:19:49,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:49,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694888066] [2021-11-20 23:19:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:49,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:19:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:19:50,491 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:19:50,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694888066] [2021-11-20 23:19:50,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694888066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:50,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:50,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:19:50,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649421014] [2021-11-20 23:19:50,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:50,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:19:50,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:50,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:19:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:19:50,530 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 23:19:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:51,020 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2021-11-20 23:19:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:19:51,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2021-11-20 23:19:51,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:51,043 INFO L225 Difference]: With dead ends: 851 [2021-11-20 23:19:51,043 INFO L226 Difference]: Without dead ends: 490 [2021-11-20 23:19:51,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:19:51,054 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 282 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:51,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 2351 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:19:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-20 23:19:51,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2021-11-20 23:19:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 23:19:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2021-11-20 23:19:51,175 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2021-11-20 23:19:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:51,177 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2021-11-20 23:19:51,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 23:19:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2021-11-20 23:19:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 23:19:51,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:51,192 INFO L514 BasicCegarLoop]: trace histogram [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 23:19:51,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:19:51,193 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:51,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1940037977, now seen corresponding path program 1 times [2021-11-20 23:19:51,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:51,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855682431] [2021-11-20 23:19:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:51,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:19:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:19:51,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:19:51,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855682431] [2021-11-20 23:19:51,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855682431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:51,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:51,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 23:19:51,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538353245] [2021-11-20 23:19:51,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:51,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:19:51,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:19:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:19:51,523 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 23:19:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:54,469 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2021-11-20 23:19:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 23:19:54,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 79 [2021-11-20 23:19:54,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:54,485 INFO L225 Difference]: With dead ends: 1287 [2021-11-20 23:19:54,486 INFO L226 Difference]: Without dead ends: 930 [2021-11-20 23:19:54,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:19:54,495 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 1736 mSDsluCounter, 2453 mSDsCounter, 0 mSdLazyCounter, 3404 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 4003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 3404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:54,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1801 Valid, 3101 Invalid, 4003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 3404 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-20 23:19:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-11-20 23:19:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2021-11-20 23:19:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2021-11-20 23:19:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2021-11-20 23:19:54,627 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2021-11-20 23:19:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:54,628 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2021-11-20 23:19:54,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 23:19:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2021-11-20 23:19:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-20 23:19:54,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:54,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:54,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:19:54,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1999918314, now seen corresponding path program 1 times [2021-11-20 23:19:54,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:54,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851620058] [2021-11-20 23:19:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:54,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:19:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:19:54,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:19:54,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851620058] [2021-11-20 23:19:54,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851620058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:54,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:54,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:19:54,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031952115] [2021-11-20 23:19:54,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:54,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:19:54,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:19:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:19:54,877 INFO L87 Difference]: Start difference. First operand 874 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:19:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:55,104 INFO L93 Difference]: Finished difference Result 1477 states and 2374 transitions. [2021-11-20 23:19:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:19:55,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2021-11-20 23:19:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:55,118 INFO L225 Difference]: With dead ends: 1477 [2021-11-20 23:19:55,119 INFO L226 Difference]: Without dead ends: 963 [2021-11-20 23:19:55,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:19:55,130 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 42 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3538 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:55,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3538 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:19:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-20 23:19:55,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 895. [2021-11-20 23:19:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 660 states have internal predecessors, (994), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 210 states have call predecessors, (228), 201 states have call successors, (228) [2021-11-20 23:19:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1428 transitions. [2021-11-20 23:19:55,211 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1428 transitions. Word has length 83 [2021-11-20 23:19:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:55,213 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1428 transitions. [2021-11-20 23:19:55,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:19:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1428 transitions. [2021-11-20 23:19:55,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 23:19:55,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:55,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:55,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:19:55,219 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2066337395, now seen corresponding path program 1 times [2021-11-20 23:19:55,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:55,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26132759] [2021-11-20 23:19:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:55,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:19:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:19:55,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:19:55,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26132759] [2021-11-20 23:19:55,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26132759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:55,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:55,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:19:55,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504853675] [2021-11-20 23:19:55,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:55,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:19:55,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:19:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:19:55,444 INFO L87 Difference]: Start difference. First operand 895 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:19:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:19:55,753 INFO L93 Difference]: Finished difference Result 1506 states and 2412 transitions. [2021-11-20 23:19:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:19:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2021-11-20 23:19:55,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:19:55,776 INFO L225 Difference]: With dead ends: 1506 [2021-11-20 23:19:55,776 INFO L226 Difference]: Without dead ends: 978 [2021-11-20 23:19:55,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:19:55,781 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 41 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3562 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:19:55,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 3562 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:19:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-20 23:19:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 898. [2021-11-20 23:19:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 632 states have (on average 1.5775316455696202) internal successors, (997), 660 states have internal predecessors, (997), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 213 states have call predecessors, (228), 201 states have call successors, (228) [2021-11-20 23:19:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1431 transitions. [2021-11-20 23:19:55,856 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1431 transitions. Word has length 84 [2021-11-20 23:19:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:19:55,857 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1431 transitions. [2021-11-20 23:19:55,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 23:19:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1431 transitions. [2021-11-20 23:19:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 23:19:55,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:19:55,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:19:55,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:19:55,876 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:19:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:19:55,877 INFO L85 PathProgramCache]: Analyzing trace with hash -56688493, now seen corresponding path program 1 times [2021-11-20 23:19:55,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:19:55,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761769551] [2021-11-20 23:19:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:19:55,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:19:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:19:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:19:56,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:19:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761769551] [2021-11-20 23:19:56,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761769551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:19:56,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:19:56,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:19:56,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402957105] [2021-11-20 23:19:56,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:19:56,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:19:56,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:19:56,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:19:56,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:19:56,266 INFO L87 Difference]: Start difference. First operand 898 states and 1431 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 23:20:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:00,183 INFO L93 Difference]: Finished difference Result 3877 states and 6311 transitions. [2021-11-20 23:20:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:20:00,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 84 [2021-11-20 23:20:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:00,219 INFO L225 Difference]: With dead ends: 3877 [2021-11-20 23:20:00,219 INFO L226 Difference]: Without dead ends: 3003 [2021-11-20 23:20:00,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:20:00,229 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 2198 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2305 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 3965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:00,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2305 Valid, 2475 Invalid, 3965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 23:20:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-11-20 23:20:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2731. [2021-11-20 23:20:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 1919 states have (on average 1.5742574257425743) internal successors, (3021), 2023 states have internal predecessors, (3021), 648 states have call successors, (648), 129 states have call predecessors, (648), 163 states have return successors, (738), 649 states have call predecessors, (738), 643 states have call successors, (738) [2021-11-20 23:20:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 4407 transitions. [2021-11-20 23:20:00,547 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 4407 transitions. Word has length 84 [2021-11-20 23:20:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:00,548 INFO L470 AbstractCegarLoop]: Abstraction has 2731 states and 4407 transitions. [2021-11-20 23:20:00,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 23:20:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 4407 transitions. [2021-11-20 23:20:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 23:20:00,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:00,559 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:20:00,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:20:00,559 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:00,561 INFO L85 PathProgramCache]: Analyzing trace with hash -866911837, now seen corresponding path program 1 times [2021-11-20 23:20:00,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32984570] [2021-11-20 23:20:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:00,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:20:00,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:00,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32984570] [2021-11-20 23:20:00,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32984570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:20:00,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:20:00,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:20:00,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257463323] [2021-11-20 23:20:00,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:00,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:20:00,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:20:00,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:20:00,758 INFO L87 Difference]: Start difference. First operand 2731 states and 4407 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-20 23:20:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:03,186 INFO L93 Difference]: Finished difference Result 6167 states and 10005 transitions. [2021-11-20 23:20:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:20:03,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 90 [2021-11-20 23:20:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:03,229 INFO L225 Difference]: With dead ends: 6167 [2021-11-20 23:20:03,229 INFO L226 Difference]: Without dead ends: 4156 [2021-11-20 23:20:03,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:20:03,245 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 2908 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 1354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 3250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1354 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:03,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3072 Valid, 1539 Invalid, 3250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1354 Valid, 1896 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 23:20:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-11-20 23:20:03,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3980. [2021-11-20 23:20:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3980 states, 2748 states have (on average 1.5334788937409025) internal successors, (4214), 2911 states have internal predecessors, (4214), 973 states have call successors, (973), 211 states have call predecessors, (973), 258 states have return successors, (1132), 963 states have call predecessors, (1132), 968 states have call successors, (1132) [2021-11-20 23:20:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3980 states to 3980 states and 6319 transitions. [2021-11-20 23:20:03,671 INFO L78 Accepts]: Start accepts. Automaton has 3980 states and 6319 transitions. Word has length 90 [2021-11-20 23:20:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:03,672 INFO L470 AbstractCegarLoop]: Abstraction has 3980 states and 6319 transitions. [2021-11-20 23:20:03,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-20 23:20:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3980 states and 6319 transitions. [2021-11-20 23:20:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-20 23:20:03,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:03,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:20:03,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:20:03,676 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1332034478, now seen corresponding path program 1 times [2021-11-20 23:20:03,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:03,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648172845] [2021-11-20 23:20:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:03,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:20:03,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:03,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648172845] [2021-11-20 23:20:03,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648172845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:20:03,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:20:03,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:20:03,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725014540] [2021-11-20 23:20:03,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:03,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:20:03,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:03,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:20:03,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:20:03,838 INFO L87 Difference]: Start difference. First operand 3980 states and 6319 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 23:20:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:05,902 INFO L93 Difference]: Finished difference Result 7521 states and 11996 transitions. [2021-11-20 23:20:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:20:05,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 92 [2021-11-20 23:20:05,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:05,942 INFO L225 Difference]: With dead ends: 7521 [2021-11-20 23:20:05,942 INFO L226 Difference]: Without dead ends: 4486 [2021-11-20 23:20:05,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:20:05,965 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 981 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:05,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1895 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 23:20:05,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-11-20 23:20:06,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 4061. [2021-11-20 23:20:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4061 states, 2802 states have (on average 1.5274803711634546) internal successors, (4280), 2977 states have internal predecessors, (4280), 976 states have call successors, (976), 226 states have call predecessors, (976), 282 states have return successors, (1166), 963 states have call predecessors, (1166), 971 states have call successors, (1166) [2021-11-20 23:20:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4061 states to 4061 states and 6422 transitions. [2021-11-20 23:20:06,451 INFO L78 Accepts]: Start accepts. Automaton has 4061 states and 6422 transitions. Word has length 92 [2021-11-20 23:20:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:06,452 INFO L470 AbstractCegarLoop]: Abstraction has 4061 states and 6422 transitions. [2021-11-20 23:20:06,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-20 23:20:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 4061 states and 6422 transitions. [2021-11-20 23:20:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 23:20:06,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:06,456 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:20:06,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:20:06,457 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:06,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:06,458 INFO L85 PathProgramCache]: Analyzing trace with hash 47364347, now seen corresponding path program 1 times [2021-11-20 23:20:06,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:06,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612496622] [2021-11-20 23:20:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:06,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:20:06,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:06,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612496622] [2021-11-20 23:20:06,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612496622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:20:06,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:20:06,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:20:06,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299524054] [2021-11-20 23:20:06,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:06,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:20:06,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:06,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:20:06,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:20:06,628 INFO L87 Difference]: Start difference. First operand 4061 states and 6422 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:20:07,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:07,311 INFO L93 Difference]: Finished difference Result 4165 states and 6584 transitions. [2021-11-20 23:20:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:20:07,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2021-11-20 23:20:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:07,348 INFO L225 Difference]: With dead ends: 4165 [2021-11-20 23:20:07,349 INFO L226 Difference]: Without dead ends: 4150 [2021-11-20 23:20:07,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:20:07,353 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 684 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:07,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1493 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:20:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-11-20 23:20:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 4067. [2021-11-20 23:20:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4067 states, 2808 states have (on average 1.5263532763532763) internal successors, (4286), 2983 states have internal predecessors, (4286), 976 states have call successors, (976), 226 states have call predecessors, (976), 282 states have return successors, (1166), 963 states have call predecessors, (1166), 971 states have call successors, (1166) [2021-11-20 23:20:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4067 states to 4067 states and 6428 transitions. [2021-11-20 23:20:07,784 INFO L78 Accepts]: Start accepts. Automaton has 4067 states and 6428 transitions. Word has length 97 [2021-11-20 23:20:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:07,785 INFO L470 AbstractCegarLoop]: Abstraction has 4067 states and 6428 transitions. [2021-11-20 23:20:07,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:20:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 4067 states and 6428 transitions. [2021-11-20 23:20:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 23:20:07,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:07,790 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:20:07,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:20:07,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1289942680, now seen corresponding path program 1 times [2021-11-20 23:20:07,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:07,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037849789] [2021-11-20 23:20:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:07,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:20:07,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:07,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037849789] [2021-11-20 23:20:07,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037849789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:20:07,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:20:07,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 23:20:07,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432225470] [2021-11-20 23:20:07,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:07,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:20:07,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:20:07,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:20:07,934 INFO L87 Difference]: Start difference. First operand 4067 states and 6428 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 23:20:08,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:08,571 INFO L93 Difference]: Finished difference Result 7620 states and 12200 transitions. [2021-11-20 23:20:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:20:08,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 101 [2021-11-20 23:20:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:08,618 INFO L225 Difference]: With dead ends: 7620 [2021-11-20 23:20:08,618 INFO L226 Difference]: Without dead ends: 4277 [2021-11-20 23:20:08,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:20:08,642 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 360 mSDsluCounter, 3756 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 4060 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:08,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 4060 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:20:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2021-11-20 23:20:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 4267. [2021-11-20 23:20:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 2994 states have (on average 1.5050100200400802) internal successors, (4506), 3173 states have internal predecessors, (4506), 981 states have call successors, (981), 231 states have call predecessors, (981), 291 states have return successors, (1169), 968 states have call predecessors, (1169), 976 states have call successors, (1169) [2021-11-20 23:20:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 6656 transitions. [2021-11-20 23:20:09,047 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 6656 transitions. Word has length 101 [2021-11-20 23:20:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:09,048 INFO L470 AbstractCegarLoop]: Abstraction has 4267 states and 6656 transitions. [2021-11-20 23:20:09,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-20 23:20:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 6656 transitions. [2021-11-20 23:20:09,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-20 23:20:09,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:09,052 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:20:09,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:20:09,052 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:09,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:09,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2022153961, now seen corresponding path program 1 times [2021-11-20 23:20:09,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:09,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167060111] [2021-11-20 23:20:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:09,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:20:09,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:09,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167060111] [2021-11-20 23:20:09,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167060111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:20:09,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:20:09,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:20:09,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951971087] [2021-11-20 23:20:09,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:09,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:20:09,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:20:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:20:09,331 INFO L87 Difference]: Start difference. First operand 4267 states and 6656 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-20 23:20:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:13,021 INFO L93 Difference]: Finished difference Result 15216 states and 24034 transitions. [2021-11-20 23:20:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:20:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 109 [2021-11-20 23:20:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:13,095 INFO L225 Difference]: With dead ends: 15216 [2021-11-20 23:20:13,095 INFO L226 Difference]: Without dead ends: 10972 [2021-11-20 23:20:13,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:20:13,123 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 2147 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 2539 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2211 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 3448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 2539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:13,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2211 Valid, 2152 Invalid, 3448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 2539 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-20 23:20:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-11-20 23:20:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 9698. [2021-11-20 23:20:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9698 states, 6831 states have (on average 1.515590689503733) internal successors, (10353), 7235 states have internal predecessors, (10353), 2236 states have call successors, (2236), 497 states have call predecessors, (2236), 630 states have return successors, (2653), 2117 states have call predecessors, (2653), 2231 states have call successors, (2653) [2021-11-20 23:20:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9698 states to 9698 states and 15242 transitions. [2021-11-20 23:20:14,053 INFO L78 Accepts]: Start accepts. Automaton has 9698 states and 15242 transitions. Word has length 109 [2021-11-20 23:20:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:14,054 INFO L470 AbstractCegarLoop]: Abstraction has 9698 states and 15242 transitions. [2021-11-20 23:20:14,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-20 23:20:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 9698 states and 15242 transitions. [2021-11-20 23:20:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-20 23:20:14,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:14,059 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 23:20:14,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:20:14,059 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:14,060 INFO L85 PathProgramCache]: Analyzing trace with hash -834580586, now seen corresponding path program 1 times [2021-11-20 23:20:14,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:14,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925984203] [2021-11-20 23:20:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:14,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 23:20:14,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925984203] [2021-11-20 23:20:14,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925984203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:20:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673877819] [2021-11-20 23:20:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:14,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:20:14,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:20:14,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:20:14,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d80931c-1d9e-40a3-8149-8d2a4309de04/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:20:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:20:14,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:20:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:20:17,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:20:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:20:20,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673877819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:20:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469785375] [2021-11-20 23:20:20,560 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2021-11-20 23:20:20,560 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:20:20,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:20:20,571 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:20:20,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:21:19,067 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2021-11-20 23:22:22,228 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2021-11-20 23:28:47,868 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 456 for LOIs [2021-11-20 23:29:11,916 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 451 for LOIs [2021-11-20 23:29:14,075 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 456 for LOIs [2021-11-20 23:30:04,766 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 30 for LOIs [2021-11-20 23:30:04,828 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 463 for LOIs [2021-11-20 23:30:10,161 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2021-11-20 23:31:02,219 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 428 for LOIs [2021-11-20 23:31:04,319 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 462 for LOIs [2021-11-20 23:31:26,039 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 495 for LOIs [2021-11-20 23:31:29,305 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2021-11-20 23:32:05,615 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 810 for LOIs