./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/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_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:00:39,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:00:39,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:00:39,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:00:39,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:00:39,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:00:39,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:00:39,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:00:39,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:00:39,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:00:39,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:00:39,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:00:39,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:00:39,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:00:39,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:00:39,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:00:39,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:00:39,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:00:39,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:00:39,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:00:39,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:00:39,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:00:39,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:00:39,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:00:39,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:00:39,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:00:39,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:00:39,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:00:39,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:00:39,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:00:39,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:00:39,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:00:39,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:00:39,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:00:39,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:00:39,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:00:39,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:00:39,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:00:39,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:00:39,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:00:39,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:00:39,463 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:00:39,483 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:00:39,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:00:39,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:00:39,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:00:39,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:00:39,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:00:39,485 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:00:39,485 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:00:39,490 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:00:39,490 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:00:39,491 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:00:39,491 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:00:39,491 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:00:39,491 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:00:39,491 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:00:39,492 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:00:39,492 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:00:39,492 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:00:39,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:00:39,493 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:00:39,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:00:39,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:00:39,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:00:39,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:00:39,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:00:39,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:00:39,494 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:00:39,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:00:39,494 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:00:39,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:00:39,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:00:39,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:00:39,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:00:39,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:00:39,495 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:00:39,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:00:39,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:00:39,496 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:00:39,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:00:39,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:00:39,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:00:39,496 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e76bca30ba241523f00afb0ea64acdcdd753d47014073d825a6028b49fb542a9 [2022-12-14 09:00:39,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:00:39,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:00:39,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:00:39,694 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:00:39,694 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:00:39,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2022-12-14 09:00:42,187 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:00:42,460 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:00:42,460 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c [2022-12-14 09:00:42,479 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/data/70f728dd1/4b6756bb62f24e019e71f5c6a41ac5c0/FLAG80720b8b2 [2022-12-14 09:00:42,770 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/data/70f728dd1/4b6756bb62f24e019e71f5c6a41ac5c0 [2022-12-14 09:00:42,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:00:42,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:00:42,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:00:42,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:00:42,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:00:42,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:00:42" (1/1) ... [2022-12-14 09:00:42,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790ecff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:42, skipping insertion in model container [2022-12-14 09:00:42,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:00:42" (1/1) ... [2022-12-14 09:00:42,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:00:42,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:00:42,925 WARN L237 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_5a813ae4-0787-434f-909b-db0d84128f99/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2022-12-14 09:00:43,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:00:43,153 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:00:43,162 WARN L237 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_5a813ae4-0787-434f-909b-db0d84128f99/sv-benchmarks/c/product-lines/elevator_spec1_product09.cil.c[1545,1558] [2022-12-14 09:00:43,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:00:43,235 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:00:43,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43 WrapperNode [2022-12-14 09:00:43,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:00:43,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:00:43,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:00:43,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:00:43,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,286 INFO L138 Inliner]: procedures = 89, calls = 331, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 801 [2022-12-14 09:00:43,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:00:43,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:00:43,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:00:43,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:00:43,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,320 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:00:43,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:00:43,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:00:43,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:00:43,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (1/1) ... [2022-12-14 09:00:43,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:00:43,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:43,355 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:00:43,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:00:43,390 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-12-14 09:00:43,390 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-12-14 09:00:43,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:00:43,390 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 09:00:43,390 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 09:00:43,390 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 09:00:43,390 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 09:00:43,390 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 09:00:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 09:00:43,391 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 09:00:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 09:00:43,391 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 09:00:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 09:00:43,391 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 09:00:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 09:00:43,391 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 09:00:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 09:00:43,391 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 09:00:43,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 09:00:43,392 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 09:00:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 09:00:43,392 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 09:00:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 09:00:43,392 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 09:00:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 09:00:43,392 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 09:00:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 09:00:43,392 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 09:00:43,392 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 09:00:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 09:00:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 09:00:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 09:00:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 09:00:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 09:00:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 09:00:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:00:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 09:00:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 09:00:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 09:00:43,393 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 09:00:43,393 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 09:00:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 09:00:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:00:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:00:43,394 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 09:00:43,394 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 09:00:43,504 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:00:43,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:00:44,217 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:00:44,686 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:00:44,686 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 09:00:44,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:00:44 BoogieIcfgContainer [2022-12-14 09:00:44,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:00:44,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:00:44,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:00:44,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:00:44,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:00:42" (1/3) ... [2022-12-14 09:00:44,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b64da68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:00:44, skipping insertion in model container [2022-12-14 09:00:44,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:00:43" (2/3) ... [2022-12-14 09:00:44,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b64da68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:00:44, skipping insertion in model container [2022-12-14 09:00:44,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:00:44" (3/3) ... [2022-12-14 09:00:44,695 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product09.cil.c [2022-12-14 09:00:44,709 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:00:44,710 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:00:44,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:00:44,754 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@ba4b999, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:00:44,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:00:44,759 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) [2022-12-14 09:00:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 09:00:44,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:44,771 INFO L195 NwaCegarLoop]: 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] [2022-12-14 09:00:44,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1384874496, now seen corresponding path program 1 times [2022-12-14 09:00:44,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:44,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117905446] [2022-12-14 09:00:44,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:44,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:00:45,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:45,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117905446] [2022-12-14 09:00:45,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117905446] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:00:45,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:00:45,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:00:45,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769191656] [2022-12-14 09:00:45,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:00:45,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:00:45,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:45,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:00:45,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:00:45,339 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) [2022-12-14 09:00:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:47,215 INFO L93 Difference]: Finished difference Result 1159 states and 1908 transitions. [2022-12-14 09:00:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:00:47,218 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 [2022-12-14 09:00:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:47,237 INFO L225 Difference]: With dead ends: 1159 [2022-12-14 09:00:47,237 INFO L226 Difference]: Without dead ends: 828 [2022-12-14 09:00:47,242 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:00:47,244 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 1625 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:47,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1686 Valid, 1676 Invalid, 2988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 2484 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 09:00:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-12-14 09:00:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 779. [2022-12-14 09:00:47,322 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) [2022-12-14 09:00:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1276 transitions. [2022-12-14 09:00:47,328 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1276 transitions. Word has length 62 [2022-12-14 09:00:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:47,328 INFO L495 AbstractCegarLoop]: Abstraction has 779 states and 1276 transitions. [2022-12-14 09:00:47,329 INFO L496 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) [2022-12-14 09:00:47,329 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1276 transitions. [2022-12-14 09:00:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 09:00:47,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:47,332 INFO L195 NwaCegarLoop]: 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] [2022-12-14 09:00:47,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:00:47,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:47,333 INFO L85 PathProgramCache]: Analyzing trace with hash 899719068, now seen corresponding path program 1 times [2022-12-14 09:00:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:47,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588411753] [2022-12-14 09:00:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:47,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:00:47,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588411753] [2022-12-14 09:00:47,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588411753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:00:47,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:00:47,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:00:47,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13885588] [2022-12-14 09:00:47,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:00:47,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:00:47,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:47,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:00:47,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:00:47,525 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) [2022-12-14 09:00:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:47,686 INFO L93 Difference]: Finished difference Result 1309 states and 2151 transitions. [2022-12-14 09:00:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:00:47,686 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 [2022-12-14 09:00:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:47,690 INFO L225 Difference]: With dead ends: 1309 [2022-12-14 09:00:47,690 INFO L226 Difference]: Without dead ends: 849 [2022-12-14 09:00:47,692 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:00:47,693 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 41 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:47,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2177 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:00:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-12-14 09:00:47,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 791. [2022-12-14 09:00:47,729 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) [2022-12-14 09:00:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1291 transitions. [2022-12-14 09:00:47,733 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1291 transitions. Word has length 67 [2022-12-14 09:00:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:47,734 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1291 transitions. [2022-12-14 09:00:47,734 INFO L496 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) [2022-12-14 09:00:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1291 transitions. [2022-12-14 09:00:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 09:00:47,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:47,736 INFO L195 NwaCegarLoop]: 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] [2022-12-14 09:00:47,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:00:47,736 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash 336116740, now seen corresponding path program 1 times [2022-12-14 09:00:47,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:47,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234885784] [2022-12-14 09:00:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:47,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:00:47,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:47,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234885784] [2022-12-14 09:00:47,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234885784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:00:47,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:00:47,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:00:47,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803625467] [2022-12-14 09:00:47,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:00:47,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:00:47,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:47,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:00:47,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:00:47,994 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) [2022-12-14 09:00:49,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:49,587 INFO L93 Difference]: Finished difference Result 1798 states and 2930 transitions. [2022-12-14 09:00:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:00:49,588 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 [2022-12-14 09:00:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:49,594 INFO L225 Difference]: With dead ends: 1798 [2022-12-14 09:00:49,594 INFO L226 Difference]: Without dead ends: 1230 [2022-12-14 09:00:49,596 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:00:49,597 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 2188 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 3054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 904 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:49,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2331 Valid, 1336 Invalid, 3054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [904 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 09:00:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-12-14 09:00:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1136. [2022-12-14 09:00:49,642 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) [2022-12-14 09:00:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1817 transitions. [2022-12-14 09:00:49,647 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1817 transitions. Word has length 71 [2022-12-14 09:00:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:49,647 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1817 transitions. [2022-12-14 09:00:49,648 INFO L496 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) [2022-12-14 09:00:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1817 transitions. [2022-12-14 09:00:49,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 09:00:49,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:49,649 INFO L195 NwaCegarLoop]: 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] [2022-12-14 09:00:49,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:00:49,650 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:49,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2138536668, now seen corresponding path program 1 times [2022-12-14 09:00:49,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:49,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187321732] [2022-12-14 09:00:49,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:49,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:00:49,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:49,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187321732] [2022-12-14 09:00:49,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187321732] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:00:49,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:00:49,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:00:49,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177898189] [2022-12-14 09:00:49,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:00:49,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:00:49,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:00:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:00:49,790 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) [2022-12-14 09:00:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:49,990 INFO L93 Difference]: Finished difference Result 2193 states and 3564 transitions. [2022-12-14 09:00:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:00:49,990 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 [2022-12-14 09:00:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:49,995 INFO L225 Difference]: With dead ends: 2193 [2022-12-14 09:00:49,995 INFO L226 Difference]: Without dead ends: 1136 [2022-12-14 09:00:49,999 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:00:49,999 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 210 mSDsluCounter, 862 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 [2022-12-14 09:00:50,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1407 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:00:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-12-14 09:00:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2022-12-14 09:00:50,047 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) [2022-12-14 09:00:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1785 transitions. [2022-12-14 09:00:50,051 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1785 transitions. Word has length 74 [2022-12-14 09:00:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:50,052 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1785 transitions. [2022-12-14 09:00:50,052 INFO L496 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) [2022-12-14 09:00:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1785 transitions. [2022-12-14 09:00:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 09:00:50,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:50,053 INFO L195 NwaCegarLoop]: 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] [2022-12-14 09:00:50,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:00:50,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:50,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1988593577, now seen corresponding path program 1 times [2022-12-14 09:00:50,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:50,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380520699] [2022-12-14 09:00:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:50,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:00:50,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:50,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380520699] [2022-12-14 09:00:50,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380520699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:00:50,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:00:50,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:00:50,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099512900] [2022-12-14 09:00:50,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:00:50,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:00:50,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:00:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:00:50,291 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) [2022-12-14 09:00:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:51,614 INFO L93 Difference]: Finished difference Result 2180 states and 3442 transitions. [2022-12-14 09:00:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:00:51,615 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 [2022-12-14 09:00:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:51,623 INFO L225 Difference]: With dead ends: 2180 [2022-12-14 09:00:51,623 INFO L226 Difference]: Without dead ends: 1324 [2022-12-14 09:00:51,627 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:00:51,628 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 912 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:51,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 1514 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 09:00:51,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-12-14 09:00:51,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1163. [2022-12-14 09:00:51,697 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) [2022-12-14 09:00:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1819 transitions. [2022-12-14 09:00:51,704 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1819 transitions. Word has length 76 [2022-12-14 09:00:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:51,705 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1819 transitions. [2022-12-14 09:00:51,705 INFO L496 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) [2022-12-14 09:00:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1819 transitions. [2022-12-14 09:00:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 09:00:51,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:51,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:00:51,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:00:51,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:51,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1662217135, now seen corresponding path program 1 times [2022-12-14 09:00:51,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:51,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617296130] [2022-12-14 09:00:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:51,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:00:51,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:51,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617296130] [2022-12-14 09:00:51,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617296130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:00:51,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:00:51,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:00:51,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136416221] [2022-12-14 09:00:51,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:00:51,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:00:51,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:51,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:00:51,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:00:51,939 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 09:00:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:52,336 INFO L93 Difference]: Finished difference Result 1235 states and 1932 transitions. [2022-12-14 09:00:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:00:52,337 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-12-14 09:00:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:52,342 INFO L225 Difference]: With dead ends: 1235 [2022-12-14 09:00:52,342 INFO L226 Difference]: Without dead ends: 1220 [2022-12-14 09:00:52,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:00:52,344 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 633 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:52,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 1680 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:00:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-12-14 09:00:52,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1167. [2022-12-14 09:00:52,400 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) [2022-12-14 09:00:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1823 transitions. [2022-12-14 09:00:52,404 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1823 transitions. Word has length 83 [2022-12-14 09:00:52,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:52,404 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1823 transitions. [2022-12-14 09:00:52,404 INFO L496 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 09:00:52,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1823 transitions. [2022-12-14 09:00:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 09:00:52,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:52,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:00:52,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:00:52,407 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2111391279, now seen corresponding path program 1 times [2022-12-14 09:00:52,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:52,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160003550] [2022-12-14 09:00:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:52,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:00:52,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:52,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160003550] [2022-12-14 09:00:52,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160003550] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:00:52,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:00:52,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:00:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740375687] [2022-12-14 09:00:52,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:00:52,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:00:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:00:52,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:00:52,559 INFO L87 Difference]: Start difference. First operand 1167 states and 1823 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-12-14 09:00:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:52,689 INFO L93 Difference]: Finished difference Result 1186 states and 1847 transitions. [2022-12-14 09:00:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:00:52,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2022-12-14 09:00:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:52,694 INFO L225 Difference]: With dead ends: 1186 [2022-12-14 09:00:52,694 INFO L226 Difference]: Without dead ends: 1171 [2022-12-14 09:00:52,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:00:52,696 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 30 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:52,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2006 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:00:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-12-14 09:00:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2022-12-14 09:00:52,751 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) [2022-12-14 09:00:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1820 transitions. [2022-12-14 09:00:52,756 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1820 transitions. Word has length 88 [2022-12-14 09:00:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:52,757 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1820 transitions. [2022-12-14 09:00:52,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-12-14 09:00:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1820 transitions. [2022-12-14 09:00:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 09:00:52,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:52,760 INFO L195 NwaCegarLoop]: 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] [2022-12-14 09:00:52,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:00:52,760 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:00:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash -188056663, now seen corresponding path program 1 times [2022-12-14 09:00:52,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:52,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833622288] [2022-12-14 09:00:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:52,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:00:53,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833622288] [2022-12-14 09:00:53,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833622288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:00:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787070307] [2022-12-14 09:00:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:53,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:53,430 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:00:53,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:00:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:00:53,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:00:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:00:55,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:00:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:00:57,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787070307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:00:57,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969985191] [2022-12-14 09:00:57,312 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-12-14 09:00:57,312 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:00:57,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:00:57,319 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:00:57,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:01:01,644 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 578 for LOIs [2022-12-14 09:01:50,960 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-12-14 09:01:52,855 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 82 for LOIs [2022-12-14 09:01:53,247 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 28 for LOIs [2022-12-14 09:01:53,255 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2022-12-14 09:01:56,785 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 438 for LOIs [2022-12-14 09:01:57,038 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 78 for LOIs [2022-12-14 09:01:57,129 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 90 for LOIs [2022-12-14 09:01:57,146 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 550 for LOIs [2022-12-14 09:01:59,735 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 821 for LOIs [2022-12-14 09:02:54,829 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 648 for LOIs [2022-12-14 09:02:55,314 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:03:06,162 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 648 DAG size of output: 515 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:03:12,739 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 688 DAG size of output: 529 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:03:18,069 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 669 DAG size of output: 607 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:03:29,698 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 821 DAG size of output: 675 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:03:49,003 WARN L233 SmtUtils]: Spent 17.34s on a formula simplification. DAG size of input: 985 DAG size of output: 697 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:04:27,194 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 506 DAG size of output: 460 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:04:33,627 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 508 DAG size of output: 462 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:04:40,730 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 511 DAG size of output: 465 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:04:57,702 WARN L233 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 520 DAG size of output: 465 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:12,924 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 526 DAG size of output: 472 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:19,131 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 532 DAG size of output: 478 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:25,838 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 548 DAG size of output: 488 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:25,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [969985191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:25,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:25,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [13, 12, 12] total 86 [2022-12-14 09:05:25,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825063805] [2022-12-14 09:05:25,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:25,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 09:05:25,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 09:05:25,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=587, Invalid=6723, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 09:05:25,844 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) [2022-12-14 09:05:31,968 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 636 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:37,860 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 648 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:07:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:32,105 INFO L93 Difference]: Finished difference Result 2968 states and 4661 transitions. [2022-12-14 09:07:32,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-14 09:07:32,106 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 [2022-12-14 09:07:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:32,111 INFO L225 Difference]: With dead ends: 2968 [2022-12-14 09:07:32,112 INFO L226 Difference]: Without dead ends: 1824 [2022-12-14 09:07:32,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 203 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3250 ImplicationChecksByTransitivity, 199.1s TimeCoverageRelationStatistics Valid=729, Invalid=8777, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 09:07:32,116 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 887 mSDsluCounter, 11746 mSDsCounter, 0 mSdLazyCounter, 25567 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 12499 SdHoareTripleChecker+Invalid, 25683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 25567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:32,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 12499 Invalid, 25683 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [116 Valid, 25567 Invalid, 0 Unknown, 0 Unchecked, 77.2s Time] [2022-12-14 09:07:32,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2022-12-14 09:07:32,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1688. [2022-12-14 09:07:32,601 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) [2022-12-14 09:07:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2617 transitions. [2022-12-14 09:07:32,607 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2617 transitions. Word has length 92 [2022-12-14 09:07:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:32,607 INFO L495 AbstractCegarLoop]: Abstraction has 1688 states and 2617 transitions. [2022-12-14 09:07:32,607 INFO L496 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) [2022-12-14 09:07:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2617 transitions. [2022-12-14 09:07:32,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 09:07:32,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:32,609 INFO L195 NwaCegarLoop]: 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] [2022-12-14 09:07:32,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:07:32,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:32,810 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:07:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:32,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2022692906, now seen corresponding path program 1 times [2022-12-14 09:07:32,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:32,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795551644] [2022-12-14 09:07:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:32,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:07:32,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:32,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795551644] [2022-12-14 09:07:32,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795551644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:32,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:32,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:07:32,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472305808] [2022-12-14 09:07:32,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:32,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:07:32,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:32,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:07:32,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:07:32,894 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) [2022-12-14 09:07:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:34,082 INFO L93 Difference]: Finished difference Result 4753 states and 7471 transitions. [2022-12-14 09:07:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:07:34,083 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 [2022-12-14 09:07:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:34,098 INFO L225 Difference]: With dead ends: 4753 [2022-12-14 09:07:34,098 INFO L226 Difference]: Without dead ends: 3212 [2022-12-14 09:07:34,102 INFO L412 NwaCegarLoop]: 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 [2022-12-14 09:07:34,103 INFO L413 NwaCegarLoop]: 971 mSDtfsCounter, 492 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1458 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 [2022-12-14 09:07:34,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1458 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:07:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2022-12-14 09:07:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 3209. [2022-12-14 09:07:34,990 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) [2022-12-14 09:07:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5018 transitions. [2022-12-14 09:07:35,003 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5018 transitions. Word has length 93 [2022-12-14 09:07:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:35,003 INFO L495 AbstractCegarLoop]: Abstraction has 3209 states and 5018 transitions. [2022-12-14 09:07:35,003 INFO L496 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) [2022-12-14 09:07:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5018 transitions. [2022-12-14 09:07:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 09:07:35,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:35,005 INFO L195 NwaCegarLoop]: 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] [2022-12-14 09:07:35,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:07:35,006 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:07:35,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:35,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1034718624, now seen corresponding path program 1 times [2022-12-14 09:07:35,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:35,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167909531] [2022-12-14 09:07:35,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:35,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:07:35,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:35,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167909531] [2022-12-14 09:07:35,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167909531] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:35,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:35,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:07:35,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823329531] [2022-12-14 09:07:35,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:35,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:35,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:35,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:35,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:35,142 INFO L87 Difference]: Start difference. First operand 3209 states and 5018 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:07:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:38,709 INFO L93 Difference]: Finished difference Result 10861 states and 17368 transitions. [2022-12-14 09:07:38,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:07:38,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2022-12-14 09:07:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:38,733 INFO L225 Difference]: With dead ends: 10861 [2022-12-14 09:07:38,733 INFO L226 Difference]: Without dead ends: 7811 [2022-12-14 09:07:38,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:07:38,741 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1249 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1303 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:38,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1303 Valid, 919 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 09:07:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7811 states. [2022-12-14 09:07:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7811 to 6902. [2022-12-14 09:07:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6902 states, 5059 states have (on average 1.5485273769519667) internal successors, (7834), 5343 states have internal predecessors, (7834), 1401 states have call successors, (1401), 369 states have call predecessors, (1401), 441 states have return successors, (1661), 1335 states have call predecessors, (1661), 1396 states have call successors, (1661) [2022-12-14 09:07:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6902 states to 6902 states and 10896 transitions. [2022-12-14 09:07:40,662 INFO L78 Accepts]: Start accepts. Automaton has 6902 states and 10896 transitions. Word has length 93 [2022-12-14 09:07:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:40,663 INFO L495 AbstractCegarLoop]: Abstraction has 6902 states and 10896 transitions. [2022-12-14 09:07:40,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 09:07:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6902 states and 10896 transitions. [2022-12-14 09:07:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 09:07:40,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:40,665 INFO L195 NwaCegarLoop]: 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] [2022-12-14 09:07:40,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:07:40,665 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:07:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:40,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2067951190, now seen corresponding path program 1 times [2022-12-14 09:07:40,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:40,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028465033] [2022-12-14 09:07:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:40,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:07:41,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028465033] [2022-12-14 09:07:41,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028465033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:07:41,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294344913] [2022-12-14 09:07:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:41,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:41,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:41,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:41,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a813ae4-0787-434f-909b-db0d84128f99/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:07:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:07:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 09:07:42,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:07:44,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294344913] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:07:44,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447201171] [2022-12-14 09:07:44,297 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2022-12-14 09:07:44,297 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:07:44,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:07:44,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:07:44,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:07:48,504 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 578 for LOIs [2022-12-14 09:08:36,211 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2022-12-14 09:08:38,053 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 82 for LOIs [2022-12-14 09:08:38,409 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 26 for LOIs [2022-12-14 09:08:38,416 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 587 for LOIs [2022-12-14 09:08:42,420 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 432 for LOIs [2022-12-14 09:08:42,870 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 78 for LOIs [2022-12-14 09:08:42,956 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 90 for LOIs [2022-12-14 09:08:42,973 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 550 for LOIs [2022-12-14 09:08:46,170 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 821 for LOIs