./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7 --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 e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:31:13,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:31:13,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:31:13,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:31:13,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:31:13,359 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:31:13,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:31:13,366 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:31:13,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:31:13,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:31:13,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:31:13,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:31:13,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:31:13,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:31:13,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:31:13,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:31:13,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:31:13,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:31:13,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:31:13,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:31:13,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:31:13,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:31:13,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:31:13,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:31:13,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:31:13,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:31:13,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:31:13,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:31:13,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:31:13,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:31:13,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:31:13,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:31:13,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:31:13,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:31:13,429 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:31:13,429 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:31:13,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:31:13,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:31:13,430 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:31:13,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:31:13,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:31:13,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:31:13,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:31:13,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:31:13,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:31:13,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:31:13,488 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:31:13,488 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:31:13,489 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:31:13,489 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:31:13,489 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:31:13,489 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:31:13,490 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:31:13,490 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:31:13,491 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:31:13,491 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:31:13,491 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:31:13,491 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:31:13,491 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:31:13,492 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:31:13,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:31:13,492 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:31:13,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:31:13,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:31:13,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:31:13,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:31:13,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:31:13,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:31:13,495 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:31:13,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:31:13,495 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:31:13,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:31:13,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:31:13,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:31:13,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:31:13,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:31:13,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:31:13,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:31:13,497 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:31:13,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:31:13,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:31:13,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:31:13,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:31:13,498 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_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 [2021-11-25 20:31:13,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:31:13,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:31:13,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:31:13,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:31:13,757 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:31:13,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-25 20:31:13,821 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/data/f6716404d/2189754813df48098b3789e0bd3c0293/FLAG573e18494 [2021-11-25 20:31:14,426 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:31:14,427 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2021-11-25 20:31:14,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/data/f6716404d/2189754813df48098b3789e0bd3c0293/FLAG573e18494 [2021-11-25 20:31:14,639 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/data/f6716404d/2189754813df48098b3789e0bd3c0293 [2021-11-25 20:31:14,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:31:14,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:31:14,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:31:14,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:31:14,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:31:14,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:31:14" (1/1) ... [2021-11-25 20:31:14,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b82fe07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:14, skipping insertion in model container [2021-11-25 20:31:14,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:31:14" (1/1) ... [2021-11-25 20:31:14,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:31:14,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:31:14,925 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_9c590267-b893-4d97-9d8d-ccc856b794db/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-25 20:31:15,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:31:15,214 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:31:15,227 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_9c590267-b893-4d97-9d8d-ccc856b794db/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2021-11-25 20:31:15,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:31:15,403 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:31:15,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15 WrapperNode [2021-11-25 20:31:15,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:31:15,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:31:15,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:31:15,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:31:15,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,542 INFO L137 Inliner]: procedures = 89, calls = 331, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 801 [2021-11-25 20:31:15,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:31:15,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:31:15,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:31:15,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:31:15,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:31:15,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:31:15,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:31:15,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:31:15,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (1/1) ... [2021-11-25 20:31:15,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:31:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:15,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:31:15,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:31:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-25 20:31:15,742 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-25 20:31:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:31:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 20:31:15,742 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 20:31:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:31:15,743 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:31:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:31:15,743 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:31:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:31:15,743 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:31:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:31:15,743 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:31:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:31:15,744 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:31:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 20:31:15,744 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 20:31:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 20:31:15,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 20:31:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:31:15,744 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:31:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:31:15,745 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:31:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:31:15,745 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:31:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:31:15,745 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:31:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:31:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:31:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:31:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:31:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:31:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:31:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:31:15,746 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:31:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:31:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:31:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:31:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:31:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:31:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:31:15,747 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:31:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:31:15,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:31:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:31:15,748 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:31:15,874 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:31:15,876 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:31:16,888 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:31:17,508 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:31:17,508 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:31:17,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:17 BoogieIcfgContainer [2021-11-25 20:31:17,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:31:17,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:31:17,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:31:17,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:31:17,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:31:14" (1/3) ... [2021-11-25 20:31:17,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e3feb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:17, skipping insertion in model container [2021-11-25 20:31:17,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:15" (2/3) ... [2021-11-25 20:31:17,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e3feb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:17, skipping insertion in model container [2021-11-25 20:31:17,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:17" (3/3) ... [2021-11-25 20:31:17,522 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2021-11-25 20:31:17,528 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:31:17,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:31:17,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:31:17,615 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 [2021-11-25 20:31:17,615 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:31:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-25 20:31:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 20:31:17,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:17,668 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] [2021-11-25 20:31:17,669 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:17,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash 249778121, now seen corresponding path program 1 times [2021-11-25 20:31:17,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:17,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640326898] [2021-11-25 20:31:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:17,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:31:18,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:18,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640326898] [2021-11-25 20:31:18,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640326898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:18,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:18,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:31:18,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229347052] [2021-11-25 20:31:18,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:18,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:31:18,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:31:18,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:18,433 INFO L87 Difference]: Start difference. First operand has 348 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 89 states have call successors, (89), 21 states have call predecessors, (89), 21 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-25 20:31:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:20,930 INFO L93 Difference]: Finished difference Result 1159 states and 1908 transitions. [2021-11-25 20:31:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 20:31:20,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2021-11-25 20:31:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:20,977 INFO L225 Difference]: With dead ends: 1159 [2021-11-25 20:31:20,977 INFO L226 Difference]: Without dead ends: 828 [2021-11-25 20:31:20,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:31:20,995 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 1623 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:20,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1684 Valid, 2122 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 20:31:21,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-11-25 20:31:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 779. [2021-11-25 20:31:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 552 states have (on average 1.6431159420289856) internal successors, (907), 587 states have internal predecessors, (907), 184 states have call successors, (184), 40 states have call predecessors, (184), 42 states have return successors, (185), 176 states have call predecessors, (185), 179 states have call successors, (185) [2021-11-25 20:31:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1276 transitions. [2021-11-25 20:31:21,231 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1276 transitions. Word has length 62 [2021-11-25 20:31:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:21,233 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1276 transitions. [2021-11-25 20:31:21,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-25 20:31:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1276 transitions. [2021-11-25 20:31:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 20:31:21,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:21,247 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] [2021-11-25 20:31:21,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:31:21,248 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:21,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1295504249, now seen corresponding path program 1 times [2021-11-25 20:31:21,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:21,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486726413] [2021-11-25 20:31:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:21,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:31:21,431 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486726413] [2021-11-25 20:31:21,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486726413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:21,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:21,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:31:21,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118068881] [2021-11-25 20:31:21,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:21,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:31:21,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:31:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:21,437 INFO L87 Difference]: Start difference. First operand 779 states and 1276 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-25 20:31:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:21,631 INFO L93 Difference]: Finished difference Result 1309 states and 2151 transitions. [2021-11-25 20:31:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:21,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2021-11-25 20:31:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:21,641 INFO L225 Difference]: With dead ends: 1309 [2021-11-25 20:31:21,641 INFO L226 Difference]: Without dead ends: 849 [2021-11-25 20:31:21,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:21,645 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 41 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:21,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 2179 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-11-25 20:31:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 791. [2021-11-25 20:31:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 561 states have (on average 1.6327985739750446) internal successors, (916), 596 states have internal predecessors, (916), 184 states have call successors, (184), 40 states have call predecessors, (184), 45 states have return successors, (191), 179 states have call predecessors, (191), 179 states have call successors, (191) [2021-11-25 20:31:21,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1291 transitions. [2021-11-25 20:31:21,708 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1291 transitions. Word has length 67 [2021-11-25 20:31:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:21,709 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 1291 transitions. [2021-11-25 20:31:21,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-25 20:31:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1291 transitions. [2021-11-25 20:31:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:31:21,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:21,713 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] [2021-11-25 20:31:21,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:31:21,714 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:21,714 INFO L85 PathProgramCache]: Analyzing trace with hash 153909345, now seen corresponding path program 1 times [2021-11-25 20:31:21,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:21,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578331478] [2021-11-25 20:31:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:21,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:31:21,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:21,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578331478] [2021-11-25 20:31:21,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578331478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:21,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:21,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:31:21,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530683140] [2021-11-25 20:31:21,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:21,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:31:21,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:31:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:31:21,977 INFO L87 Difference]: Start difference. First operand 791 states and 1291 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-25 20:31:23,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:23,967 INFO L93 Difference]: Finished difference Result 1798 states and 2930 transitions. [2021-11-25 20:31:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:31:23,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2021-11-25 20:31:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:23,979 INFO L225 Difference]: With dead ends: 1798 [2021-11-25 20:31:23,980 INFO L226 Difference]: Without dead ends: 1230 [2021-11-25 20:31:23,983 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 [2021-11-25 20:31:23,985 INFO L933 BasicCegarLoop]: 798 mSDtfsCounter, 2176 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 926 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:23,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2319 Valid, 1653 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 1833 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 20:31:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-25 20:31:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1136. [2021-11-25 20:31:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5881612090680102) internal successors, (1261), 846 states have internal predecessors, (1261), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2021-11-25 20:31:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1817 transitions. [2021-11-25 20:31:24,081 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1817 transitions. Word has length 71 [2021-11-25 20:31:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:24,082 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1817 transitions. [2021-11-25 20:31:24,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-25 20:31:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1817 transitions. [2021-11-25 20:31:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 20:31:24,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:24,085 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] [2021-11-25 20:31:24,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:31:24,086 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:24,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:24,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1175148195, now seen corresponding path program 1 times [2021-11-25 20:31:24,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:24,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194964750] [2021-11-25 20:31:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:24,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:31:24,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:24,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194964750] [2021-11-25 20:31:24,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194964750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:24,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:24,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:31:24,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218682982] [2021-11-25 20:31:24,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:24,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:24,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:31:24,199 INFO L87 Difference]: Start difference. First operand 1136 states and 1817 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 20:31:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:24,418 INFO L93 Difference]: Finished difference Result 2193 states and 3564 transitions. [2021-11-25 20:31:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:31:24,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-11-25 20:31:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:24,429 INFO L225 Difference]: With dead ends: 2193 [2021-11-25 20:31:24,429 INFO L226 Difference]: Without dead ends: 1136 [2021-11-25 20:31:24,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:31:24,437 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 210 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:24,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1407 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-25 20:31:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2021-11-25 20:31:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 794 states have (on average 1.5478589420654911) internal successors, (1229), 846 states have internal predecessors, (1229), 270 states have call successors, (270), 63 states have call predecessors, (270), 71 states have return successors, (286), 263 states have call predecessors, (286), 265 states have call successors, (286) [2021-11-25 20:31:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1785 transitions. [2021-11-25 20:31:24,536 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1785 transitions. Word has length 74 [2021-11-25 20:31:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:24,537 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1785 transitions. [2021-11-25 20:31:24,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 20:31:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1785 transitions. [2021-11-25 20:31:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:31:24,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:24,540 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] [2021-11-25 20:31:24,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:31:24,540 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1504812747, now seen corresponding path program 1 times [2021-11-25 20:31:24,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:24,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460323414] [2021-11-25 20:31:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:24,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:31:24,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:24,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460323414] [2021-11-25 20:31:24,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460323414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:24,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:24,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:31:24,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480719976] [2021-11-25 20:31:24,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:24,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:31:24,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:24,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:31:24,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:24,677 INFO L87 Difference]: Start difference. First operand 1136 states and 1785 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:31:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:26,349 INFO L93 Difference]: Finished difference Result 2180 states and 3442 transitions. [2021-11-25 20:31:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:31:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2021-11-25 20:31:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:26,361 INFO L225 Difference]: With dead ends: 2180 [2021-11-25 20:31:26,362 INFO L226 Difference]: Without dead ends: 1324 [2021-11-25 20:31:26,366 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 [2021-11-25 20:31:26,372 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 900 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:26,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 1767 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:31:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-11-25 20:31:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1163. [2021-11-25 20:31:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 812 states have (on average 1.54064039408867) internal successors, (1251), 868 states have internal predecessors, (1251), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2021-11-25 20:31:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1819 transitions. [2021-11-25 20:31:26,454 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1819 transitions. Word has length 76 [2021-11-25 20:31:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:26,456 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 1819 transitions. [2021-11-25 20:31:26,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:31:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1819 transitions. [2021-11-25 20:31:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 20:31:26,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:26,461 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] [2021-11-25 20:31:26,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:31:26,461 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:26,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1352152075, now seen corresponding path program 1 times [2021-11-25 20:31:26,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:26,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967125787] [2021-11-25 20:31:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:26,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:31:26,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:26,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967125787] [2021-11-25 20:31:26,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967125787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:26,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:26,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:31:26,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510488907] [2021-11-25 20:31:26,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:26,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:31:26,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:31:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:26,647 INFO L87 Difference]: Start difference. First operand 1163 states and 1819 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 20:31:27,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:27,185 INFO L93 Difference]: Finished difference Result 1235 states and 1932 transitions. [2021-11-25 20:31:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:31:27,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2021-11-25 20:31:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:27,195 INFO L225 Difference]: With dead ends: 1235 [2021-11-25 20:31:27,196 INFO L226 Difference]: Without dead ends: 1220 [2021-11-25 20:31:27,197 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 [2021-11-25 20:31:27,198 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 632 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:27,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1680 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:31:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-11-25 20:31:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1167. [2021-11-25 20:31:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5379901960784315) internal successors, (1255), 872 states have internal predecessors, (1255), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2021-11-25 20:31:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1823 transitions. [2021-11-25 20:31:27,276 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1823 transitions. Word has length 80 [2021-11-25 20:31:27,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:27,276 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1823 transitions. [2021-11-25 20:31:27,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 20:31:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1823 transitions. [2021-11-25 20:31:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-25 20:31:27,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:27,279 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] [2021-11-25 20:31:27,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:31:27,279 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:27,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1690953911, now seen corresponding path program 1 times [2021-11-25 20:31:27,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:27,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791697286] [2021-11-25 20:31:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:27,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:31:27,410 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:27,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791697286] [2021-11-25 20:31:27,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791697286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:27,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:27,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:31:27,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544448270] [2021-11-25 20:31:27,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:27,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:31:27,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:27,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:31:27,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:27,412 INFO L87 Difference]: Start difference. First operand 1167 states and 1823 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:31:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:27,655 INFO L93 Difference]: Finished difference Result 1186 states and 1847 transitions. [2021-11-25 20:31:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:31:27,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 85 [2021-11-25 20:31:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:27,666 INFO L225 Difference]: With dead ends: 1186 [2021-11-25 20:31:27,666 INFO L226 Difference]: Without dead ends: 1171 [2021-11-25 20:31:27,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:31:27,670 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 257 mSDsluCounter, 2358 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2714 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:27,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 2714 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-11-25 20:31:27,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2021-11-25 20:31:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 816 states have (on average 1.5343137254901962) internal successors, (1252), 872 states have internal predecessors, (1252), 271 states have call successors, (271), 68 states have call predecessors, (271), 79 states have return successors, (297), 263 states have call predecessors, (297), 266 states have call successors, (297) [2021-11-25 20:31:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1820 transitions. [2021-11-25 20:31:27,789 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1820 transitions. Word has length 85 [2021-11-25 20:31:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:27,789 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1820 transitions. [2021-11-25 20:31:27,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:31:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1820 transitions. [2021-11-25 20:31:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 20:31:27,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:27,794 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] [2021-11-25 20:31:27,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:31:27,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:27,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash -259486170, now seen corresponding path program 1 times [2021-11-25 20:31:27,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:27,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073631730] [2021-11-25 20:31:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:27,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:31:28,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073631730] [2021-11-25 20:31:28,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073631730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550514492] [2021-11-25 20:31:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:28,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:28,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:28,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:28,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:31:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:28,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 20:31:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:31:30,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:31:33,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550514492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:31:33,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386885117] [2021-11-25 20:31:33,537 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2021-11-25 20:31:33,537 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:31:33,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:31:33,547 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:31:33,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:31:40,145 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 578 for LOIs [2021-11-25 20:32:21,928 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2021-11-25 20:32:23,969 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 82 for LOIs [2021-11-25 20:32:24,517 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 28 for LOIs [2021-11-25 20:32:24,529 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2021-11-25 20:32:27,916 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 438 for LOIs [2021-11-25 20:32:28,127 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 78 for LOIs [2021-11-25 20:32:28,240 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 90 for LOIs [2021-11-25 20:32:28,261 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 550 for LOIs [2021-11-25 20:32:30,741 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 821 for LOIs [2021-11-25 20:32:36,148 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 648 for LOIs [2021-11-25 20:32:36,550 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:51,406 WARN L227 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 648 DAG size of output: 515 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:33:00,983 WARN L227 SmtUtils]: Spent 8.90s on a formula simplification. DAG size of input: 688 DAG size of output: 529 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:33:06,969 WARN L227 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 669 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:33:13,015 WARN L227 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 669 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:33:22,295 WARN L227 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 821 DAG size of output: 675 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:33:29,227 WARN L227 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 830 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:34:17,615 WARN L227 SmtUtils]: Spent 7.85s on a formula simplification. DAG size of input: 506 DAG size of output: 460 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:34:26,247 WARN L227 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 508 DAG size of output: 462 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:34:34,956 WARN L227 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 511 DAG size of output: 465 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:34:42,784 WARN L227 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 438 DAG size of output: 425 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:34:49,628 WARN L227 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 442 DAG size of output: 429 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:34:58,710 WARN L227 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 520 DAG size of output: 465 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:35:19,158 WARN L227 SmtUtils]: Spent 7.52s on a formula simplification. DAG size of input: 526 DAG size of output: 472 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:35:28,128 WARN L227 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 532 DAG size of output: 478 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:35:37,241 WARN L227 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 548 DAG size of output: 488 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:35:37,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1386885117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:35:37,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:35:37,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [13, 12, 12] total 86 [2021-11-25 20:35:37,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096631145] [2021-11-25 20:35:37,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:35:37,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-25 20:35:37,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:35:37,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-25 20:35:37,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=6743, Unknown=0, NotChecked=0, Total=7310 [2021-11-25 20:35:37,248 INFO L87 Difference]: Start difference. First operand 1167 states and 1820 transitions. Second operand has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-25 20:35:44,307 WARN L227 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 636 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:35:51,187 WARN L227 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 648 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:36:02,458 WARN L227 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 599 DAG size of output: 553 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:36:07,859 WARN L227 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 611 DAG size of output: 560 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:36:50,052 WARN L227 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 431 DAG size of output: 428 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:36:56,502 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 444 DAG size of output: 441 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:37:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:50,678 INFO L93 Difference]: Finished difference Result 2968 states and 4661 transitions. [2021-11-25 20:37:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-25 20:37:50,688 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) Word has length 92 [2021-11-25 20:37:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:50,701 INFO L225 Difference]: With dead ends: 2968 [2021-11-25 20:37:50,701 INFO L226 Difference]: Without dead ends: 1824 [2021-11-25 20:37:50,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 203 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3231 ImplicationChecksByTransitivity, 240.0s TimeCoverageRelationStatistics Valid=708, Invalid=8798, Unknown=0, NotChecked=0, Total=9506 [2021-11-25 20:37:50,710 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 973 mSDsluCounter, 11876 mSDsCounter, 0 mSdLazyCounter, 21709 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 12299 SdHoareTripleChecker+Invalid, 21853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 21709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:50,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 12299 Invalid, 21853 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [144 Valid, 21709 Invalid, 0 Unknown, 0 Unchecked, 74.2s Time] [2021-11-25 20:37:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-11-25 20:37:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1688. [2021-11-25 20:37:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1203 states have (on average 1.5261845386533666) internal successors, (1836), 1275 states have internal predecessors, (1836), 373 states have call successors, (373), 95 states have call predecessors, (373), 111 states have return successors, (408), 366 states have call predecessors, (408), 368 states have call successors, (408) [2021-11-25 20:37:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2617 transitions. [2021-11-25 20:37:51,093 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2617 transitions. Word has length 92 [2021-11-25 20:37:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:51,095 INFO L470 AbstractCegarLoop]: Abstraction has 1688 states and 2617 transitions. [2021-11-25 20:37:51,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-25 20:37:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2617 transitions. [2021-11-25 20:37:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:37:51,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:51,099 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] [2021-11-25 20:37:51,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:51,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:51,326 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:51,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:51,326 INFO L85 PathProgramCache]: Analyzing trace with hash 281717169, now seen corresponding path program 1 times [2021-11-25 20:37:51,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:51,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335721735] [2021-11-25 20:37:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:51,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:37:51,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335721735] [2021-11-25 20:37:51,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335721735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:51,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:51,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:37:51,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991042242] [2021-11-25 20:37:51,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:51,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:51,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:51,451 INFO L87 Difference]: Start difference. First operand 1688 states and 2617 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 20:37:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:52,132 INFO L93 Difference]: Finished difference Result 4753 states and 7471 transitions. [2021-11-25 20:37:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2021-11-25 20:37:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:52,156 INFO L225 Difference]: With dead ends: 4753 [2021-11-25 20:37:52,156 INFO L226 Difference]: Without dead ends: 3212 [2021-11-25 20:37:52,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:52,166 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 492 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:52,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 1461 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2021-11-25 20:37:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 3209. [2021-11-25 20:37:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2289 states have (on average 1.5351681957186545) internal successors, (3514), 2427 states have internal predecessors, (3514), 710 states have call successors, (710), 177 states have call predecessors, (710), 209 states have return successors, (794), 702 states have call predecessors, (794), 705 states have call successors, (794) [2021-11-25 20:37:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5018 transitions. [2021-11-25 20:37:52,790 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5018 transitions. Word has length 93 [2021-11-25 20:37:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:52,791 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 5018 transitions. [2021-11-25 20:37:52,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 20:37:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5018 transitions. [2021-11-25 20:37:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:37:52,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:52,794 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] [2021-11-25 20:37:52,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:37:52,794 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:52,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:52,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1886588137, now seen corresponding path program 1 times [2021-11-25 20:37:52,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:52,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613284341] [2021-11-25 20:37:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:52,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:37:53,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613284341] [2021-11-25 20:37:53,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613284341] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:37:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139894] [2021-11-25 20:37:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:53,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:53,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:53,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:53,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c590267-b893-4d97-9d8d-ccc856b794db/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:37:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 20:37:53,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:37:54,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:37:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:37:57,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:37:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505780156] [2021-11-25 20:37:57,164 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2021-11-25 20:37:57,165 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:37:57,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:37:57,166 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:37:57,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:38:02,054 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 578 for LOIs [2021-11-25 20:38:41,448 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2021-11-25 20:38:43,429 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 83 for LOIs [2021-11-25 20:38:43,933 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 25 for LOIs [2021-11-25 20:38:43,942 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2021-11-25 20:38:47,312 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 432 for LOIs [2021-11-25 20:38:47,527 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 78 for LOIs [2021-11-25 20:38:47,641 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 90 for LOIs [2021-11-25 20:38:47,662 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 550 for LOIs [2021-11-25 20:38:50,185 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 821 for LOIs [2021-11-25 20:38:55,096 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 648 for LOIs [2021-11-25 20:38:55,499 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:39:10,889 WARN L227 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 648 DAG size of output: 515 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:39:20,864 WARN L227 SmtUtils]: Spent 9.28s on a formula simplification. DAG size of input: 688 DAG size of output: 529 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:39:27,131 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 669 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:39:33,401 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 669 DAG size of output: 607 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:39:43,102 WARN L227 SmtUtils]: Spent 8.42s on a formula simplification. DAG size of input: 821 DAG size of output: 675 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:39:50,250 WARN L227 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 830 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:40:38,240 WARN L227 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 500 DAG size of output: 457 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:40:46,303 WARN L227 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 502 DAG size of output: 451 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:40:54,437 WARN L227 SmtUtils]: Spent 7.04s on a formula simplification. DAG size of input: 505 DAG size of output: 454 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:41:02,713 WARN L227 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 432 DAG size of output: 417 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:41:10,026 WARN L227 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 436 DAG size of output: 421 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:41:20,800 WARN L227 SmtUtils]: Spent 9.51s on a formula simplification. DAG size of input: 514 DAG size of output: 472 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:41:29,737 WARN L227 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 514 DAG size of output: 456 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:41:38,903 WARN L227 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 517 DAG size of output: 459 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:41:48,310 WARN L227 SmtUtils]: Spent 7.96s on a formula simplification. DAG size of input: 520 DAG size of output: 463 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:41:57,898 WARN L227 SmtUtils]: Spent 8.00s on a formula simplification. DAG size of input: 526 DAG size of output: 469 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:42:07,734 WARN L227 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 542 DAG size of output: 479 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:42:07,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1505780156] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:42:07,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:42:07,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [13, 12, 12] total 84 [2021-11-25 20:42:07,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675628137] [2021-11-25 20:42:07,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:42:07,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-25 20:42:07,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:42:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-25 20:42:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=6424, Unknown=0, NotChecked=0, Total=6972 [2021-11-25 20:42:07,741 INFO L87 Difference]: Start difference. First operand 3209 states and 5018 transitions. Second operand has 56 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 35 states have internal predecessors, (55), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-25 20:42:15,150 WARN L227 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 636 DAG size of output: 590 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:42:22,512 WARN L227 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 648 DAG size of output: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:42:28,107 WARN L227 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 736 DAG size of output: 622 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:42:34,082 WARN L227 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 599 DAG size of output: 553 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:42:39,809 WARN L227 SmtUtils]: Spent 5.47s on a formula simplification. DAG size of input: 611 DAG size of output: 560 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)