./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V --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 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:47:02,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:47:02,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:47:02,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:47:02,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:47:02,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:47:02,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:47:02,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:47:02,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:47:02,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:47:02,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:47:02,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:47:02,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:47:02,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:47:02,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:47:02,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:47:02,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:47:02,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:47:02,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:47:02,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:47:02,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:47:02,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:47:02,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:47:02,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:47:02,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:47:02,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:47:02,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:47:02,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:47:02,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:47:02,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:47:02,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:47:02,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:47:02,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:47:02,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:47:02,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:47:02,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:47:02,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:47:02,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:47:02,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:47:02,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:47:02,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:47:02,446 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:47:02,471 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:47:02,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:47:02,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:47:02,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:47:02,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:47:02,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:47:02,473 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:47:02,473 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:47:02,474 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:47:02,474 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:47:02,474 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:47:02,474 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:47:02,474 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:47:02,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:47:02,475 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:47:02,475 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:47:02,475 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:47:02,476 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:47:02,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:47:02,477 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:47:02,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:47:02,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:47:02,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:47:02,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:47:02,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:47:02,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:47:02,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:47:02,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:47:02,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:47:02,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:47:02,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:47:02,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:47:02,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:02,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:47:02,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:47:02,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:47:02,498 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:47:02,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:47:02,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:47:02,498 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:47:02,498 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:47:02,499 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 [2021-11-23 03:47:02,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:47:02,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:47:02,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:47:02,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:47:02,817 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:47:02,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-23 03:47:02,909 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/data/b195dc673/8d6ca73ece7d4de68be602bb19f6ff83/FLAG3560b77dc [2021-11-23 03:47:03,571 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:47:03,572 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-11-23 03:47:03,608 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/data/b195dc673/8d6ca73ece7d4de68be602bb19f6ff83/FLAG3560b77dc [2021-11-23 03:47:03,778 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/data/b195dc673/8d6ca73ece7d4de68be602bb19f6ff83 [2021-11-23 03:47:03,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:47:03,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:47:03,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:03,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:47:03,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:47:03,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:03" (1/1) ... [2021-11-23 03:47:03,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ab7beac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:03, skipping insertion in model container [2021-11-23 03:47:03,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:03" (1/1) ... [2021-11-23 03:47:03,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:47:03,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:47:04,228 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-23 03:47:04,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:04,488 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:47:04,548 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-11-23 03:47:04,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:04,639 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:47:04,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04 WrapperNode [2021-11-23 03:47:04,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:04,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:04,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:47:04,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:47:04,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,774 INFO L137 Inliner]: procedures = 90, calls = 333, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 791 [2021-11-23 03:47:04,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:04,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:47:04,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:47:04,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:47:04,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:47:04,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:47:04,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:47:04,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:47:04,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (1/1) ... [2021-11-23 03:47:04,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:04,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:04,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:47:04,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:47:05,007 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-23 03:47:05,007 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-23 03:47:05,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:47:05,008 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-23 03:47:05,008 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-23 03:47:05,008 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-23 03:47:05,008 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-23 03:47:05,009 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 03:47:05,009 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 03:47:05,009 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 03:47:05,009 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 03:47:05,009 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 03:47:05,010 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 03:47:05,010 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 03:47:05,010 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 03:47:05,010 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 03:47:05,010 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 03:47:05,010 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-23 03:47:05,011 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-23 03:47:05,011 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-23 03:47:05,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-23 03:47:05,011 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 03:47:05,011 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 03:47:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 03:47:05,012 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 03:47:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 03:47:05,012 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 03:47:05,012 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 03:47:05,013 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 03:47:05,013 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 03:47:05,013 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 03:47:05,013 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 03:47:05,013 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 03:47:05,013 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 03:47:05,014 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 03:47:05,014 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 03:47:05,014 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 03:47:05,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:47:05,014 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 03:47:05,014 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 03:47:05,014 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 03:47:05,014 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 03:47:05,015 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 03:47:05,015 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 03:47:05,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:47:05,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:47:05,017 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 03:47:05,017 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 03:47:05,148 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:47:05,150 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:47:06,425 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:47:07,140 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:47:07,141 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:47:07,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:07 BoogieIcfgContainer [2021-11-23 03:47:07,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:47:07,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:47:07,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:47:07,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:47:07,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:47:03" (1/3) ... [2021-11-23 03:47:07,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5679faed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:07, skipping insertion in model container [2021-11-23 03:47:07,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:04" (2/3) ... [2021-11-23 03:47:07,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5679faed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:07, skipping insertion in model container [2021-11-23 03:47:07,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:07" (3/3) ... [2021-11-23 03:47:07,167 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product17.cil.c [2021-11-23 03:47:07,178 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:47:07,179 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:47:07,261 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:47:07,273 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:47:07,273 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:47:07,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 354 states, 239 states have (on average 1.6150627615062763) internal successors, (386), 260 states have internal predecessors, (386), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-23 03:47:07,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 03:47:07,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:07,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:07,367 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:07,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:07,378 INFO L85 PathProgramCache]: Analyzing trace with hash -975839384, now seen corresponding path program 1 times [2021-11-23 03:47:07,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:07,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709858693] [2021-11-23 03:47:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:07,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:08,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709858693] [2021-11-23 03:47:08,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709858693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:08,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:08,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:47:08,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151121410] [2021-11-23 03:47:08,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:08,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:47:08,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:47:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:47:08,165 INFO L87 Difference]: Start difference. First operand has 354 states, 239 states have (on average 1.6150627615062763) internal successors, (386), 260 states have internal predecessors, (386), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:47:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:10,960 INFO L93 Difference]: Finished difference Result 1177 states and 1929 transitions. [2021-11-23 03:47:10,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:47:10,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2021-11-23 03:47:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:10,993 INFO L225 Difference]: With dead ends: 1177 [2021-11-23 03:47:10,993 INFO L226 Difference]: Without dead ends: 840 [2021-11-23 03:47:11,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:47:11,009 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1632 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 2075 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 2128 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 2075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:11,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1695 Valid, 2128 Invalid, 2591 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [516 Valid, 2075 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 03:47:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-23 03:47:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 791. [2021-11-23 03:47:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 558 states have (on average 1.636200716845878) internal successors, (913), 593 states have internal predecessors, (913), 188 states have call successors, (188), 42 states have call predecessors, (188), 44 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2021-11-23 03:47:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1290 transitions. [2021-11-23 03:47:11,214 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1290 transitions. Word has length 62 [2021-11-23 03:47:11,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:11,220 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 1290 transitions. [2021-11-23 03:47:11,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-23 03:47:11,221 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1290 transitions. [2021-11-23 03:47:11,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 03:47:11,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:11,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:11,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:47:11,236 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:11,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:11,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2018824679, now seen corresponding path program 1 times [2021-11-23 03:47:11,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:11,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45522239] [2021-11-23 03:47:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:11,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:11,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:11,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45522239] [2021-11-23 03:47:11,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45522239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:11,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:11,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:47:11,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884814244] [2021-11-23 03:47:11,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:11,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:47:11,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:47:11,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:47:11,580 INFO L87 Difference]: Start difference. First operand 791 states and 1290 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:47:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:11,843 INFO L93 Difference]: Finished difference Result 1327 states and 2172 transitions. [2021-11-23 03:47:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:47:11,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2021-11-23 03:47:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:11,857 INFO L225 Difference]: With dead ends: 1327 [2021-11-23 03:47:11,857 INFO L226 Difference]: Without dead ends: 861 [2021-11-23 03:47:11,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:47:11,868 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 41 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:11,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 2195 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:47:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-11-23 03:47:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 803. [2021-11-23 03:47:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 567 states have (on average 1.6261022927689595) internal successors, (922), 602 states have internal predecessors, (922), 188 states have call successors, (188), 42 states have call predecessors, (188), 47 states have return successors, (195), 183 states have call predecessors, (195), 183 states have call successors, (195) [2021-11-23 03:47:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1305 transitions. [2021-11-23 03:47:12,026 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1305 transitions. Word has length 67 [2021-11-23 03:47:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:12,027 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1305 transitions. [2021-11-23 03:47:12,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:47:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1305 transitions. [2021-11-23 03:47:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 03:47:12,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:12,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:12,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:47:12,032 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:12,033 INFO L85 PathProgramCache]: Analyzing trace with hash 520511617, now seen corresponding path program 1 times [2021-11-23 03:47:12,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:12,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479820733] [2021-11-23 03:47:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:12,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:12,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:12,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479820733] [2021-11-23 03:47:12,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479820733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:12,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:12,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:47:12,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404267559] [2021-11-23 03:47:12,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:12,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:47:12,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:47:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:47:12,302 INFO L87 Difference]: Start difference. First operand 803 states and 1305 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-23 03:47:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:14,552 INFO L93 Difference]: Finished difference Result 1822 states and 2958 transitions. [2021-11-23 03:47:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:47:14,552 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2021-11-23 03:47:14,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:14,576 INFO L225 Difference]: With dead ends: 1822 [2021-11-23 03:47:14,576 INFO L226 Difference]: Without dead ends: 1248 [2021-11-23 03:47:14,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:47:14,590 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 1565 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1712 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:14,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1712 Valid, 1689 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 03:47:14,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-11-23 03:47:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1154. [2021-11-23 03:47:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 803 states have (on average 1.5815691158156913) internal successors, (1270), 855 states have internal predecessors, (1270), 276 states have call successors, (276), 66 states have call predecessors, (276), 74 states have return successors, (292), 269 states have call predecessors, (292), 271 states have call successors, (292) [2021-11-23 03:47:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1838 transitions. [2021-11-23 03:47:14,691 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1838 transitions. Word has length 71 [2021-11-23 03:47:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:14,692 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1838 transitions. [2021-11-23 03:47:14,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 6 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-23 03:47:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1838 transitions. [2021-11-23 03:47:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 03:47:14,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:14,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:14,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:47:14,697 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:14,697 INFO L85 PathProgramCache]: Analyzing trace with hash 565361145, now seen corresponding path program 1 times [2021-11-23 03:47:14,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:14,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90064178] [2021-11-23 03:47:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:14,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:14,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:14,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90064178] [2021-11-23 03:47:14,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90064178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:14,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:14,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:47:14,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461820828] [2021-11-23 03:47:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:14,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:47:14,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:14,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:47:14,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:47:14,930 INFO L87 Difference]: Start difference. First operand 1154 states and 1838 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:47:15,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:15,169 INFO L93 Difference]: Finished difference Result 2223 states and 3599 transitions. [2021-11-23 03:47:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:47:15,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-11-23 03:47:15,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:15,180 INFO L225 Difference]: With dead ends: 2223 [2021-11-23 03:47:15,180 INFO L226 Difference]: Without dead ends: 1154 [2021-11-23 03:47:15,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:47:15,187 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 210 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:15,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 1419 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:47:15,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-11-23 03:47:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1154. [2021-11-23 03:47:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 803 states have (on average 1.5417185554171855) internal successors, (1238), 855 states have internal predecessors, (1238), 276 states have call successors, (276), 66 states have call predecessors, (276), 74 states have return successors, (292), 269 states have call predecessors, (292), 271 states have call successors, (292) [2021-11-23 03:47:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1806 transitions. [2021-11-23 03:47:15,267 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1806 transitions. Word has length 74 [2021-11-23 03:47:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:15,267 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1806 transitions. [2021-11-23 03:47:15,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:47:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1806 transitions. [2021-11-23 03:47:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 03:47:15,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:15,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:15,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:47:15,271 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1229553803, now seen corresponding path program 1 times [2021-11-23 03:47:15,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:15,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080706565] [2021-11-23 03:47:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:15,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:47:15,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:15,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080706565] [2021-11-23 03:47:15,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080706565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:15,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:15,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:47:15,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491270555] [2021-11-23 03:47:15,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:15,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:47:15,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:47:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:47:15,409 INFO L87 Difference]: Start difference. First operand 1154 states and 1806 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 03:47:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:17,234 INFO L93 Difference]: Finished difference Result 2210 states and 3477 transitions. [2021-11-23 03:47:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:47:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2021-11-23 03:47:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:17,246 INFO L225 Difference]: With dead ends: 2210 [2021-11-23 03:47:17,246 INFO L226 Difference]: Without dead ends: 1342 [2021-11-23 03:47:17,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:47:17,252 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 909 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:17,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1771 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 03:47:17,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-11-23 03:47:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1181. [2021-11-23 03:47:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 821 states have (on average 1.5347137637028014) internal successors, (1260), 877 states have internal predecessors, (1260), 277 states have call successors, (277), 71 states have call predecessors, (277), 82 states have return successors, (303), 269 states have call predecessors, (303), 272 states have call successors, (303) [2021-11-23 03:47:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1840 transitions. [2021-11-23 03:47:17,335 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1840 transitions. Word has length 76 [2021-11-23 03:47:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:17,335 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1840 transitions. [2021-11-23 03:47:17,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 03:47:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1840 transitions. [2021-11-23 03:47:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 03:47:17,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:17,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:17,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:47:17,339 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash 611238602, now seen corresponding path program 1 times [2021-11-23 03:47:17,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402922889] [2021-11-23 03:47:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:17,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:47:17,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:17,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402922889] [2021-11-23 03:47:17,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402922889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:17,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:17,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:47:17,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660504558] [2021-11-23 03:47:17,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:17,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:47:17,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:47:17,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:47:17,464 INFO L87 Difference]: Start difference. First operand 1181 states and 1840 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:47:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:18,005 INFO L93 Difference]: Finished difference Result 1253 states and 1953 transitions. [2021-11-23 03:47:18,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:47:18,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 80 [2021-11-23 03:47:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:18,020 INFO L225 Difference]: With dead ends: 1253 [2021-11-23 03:47:18,021 INFO L226 Difference]: Without dead ends: 1238 [2021-11-23 03:47:18,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:47:18,024 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 639 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:18,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 1356 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:47:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-11-23 03:47:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1185. [2021-11-23 03:47:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 825 states have (on average 1.5321212121212122) internal successors, (1264), 881 states have internal predecessors, (1264), 277 states have call successors, (277), 71 states have call predecessors, (277), 82 states have return successors, (303), 269 states have call predecessors, (303), 272 states have call successors, (303) [2021-11-23 03:47:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1844 transitions. [2021-11-23 03:47:18,124 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1844 transitions. Word has length 80 [2021-11-23 03:47:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:18,125 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1844 transitions. [2021-11-23 03:47:18,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-23 03:47:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1844 transitions. [2021-11-23 03:47:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 03:47:18,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:18,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:18,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:47:18,133 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:18,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1340789007, now seen corresponding path program 1 times [2021-11-23 03:47:18,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:18,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228365616] [2021-11-23 03:47:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:18,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:47:18,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:18,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228365616] [2021-11-23 03:47:18,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228365616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:18,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:18,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:47:18,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153711389] [2021-11-23 03:47:18,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:18,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:47:18,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:47:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:47:18,324 INFO L87 Difference]: Start difference. First operand 1185 states and 1844 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 03:47:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:18,626 INFO L93 Difference]: Finished difference Result 1204 states and 1868 transitions. [2021-11-23 03:47:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:47:18,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 85 [2021-11-23 03:47:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:18,639 INFO L225 Difference]: With dead ends: 1204 [2021-11-23 03:47:18,639 INFO L226 Difference]: Without dead ends: 1189 [2021-11-23 03:47:18,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:47:18,641 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 257 mSDsluCounter, 2393 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2738 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:18,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 2738 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:47:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-11-23 03:47:18,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1185. [2021-11-23 03:47:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 825 states have (on average 1.5284848484848486) internal successors, (1261), 881 states have internal predecessors, (1261), 277 states have call successors, (277), 71 states have call predecessors, (277), 82 states have return successors, (303), 269 states have call predecessors, (303), 272 states have call successors, (303) [2021-11-23 03:47:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1841 transitions. [2021-11-23 03:47:18,778 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1841 transitions. Word has length 85 [2021-11-23 03:47:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:18,779 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1841 transitions. [2021-11-23 03:47:18,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 03:47:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1841 transitions. [2021-11-23 03:47:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 03:47:18,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:18,783 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:18,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:47:18,783 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash 280371306, now seen corresponding path program 1 times [2021-11-23 03:47:18,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:18,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28504946] [2021-11-23 03:47:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:18,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:47:19,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28504946] [2021-11-23 03:47:19,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28504946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:47:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080200370] [2021-11-23 03:47:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:19,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:19,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:47:19,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:47:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:19,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 03:47:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:47:21,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:47:24,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080200370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:24,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114814537] [2021-11-23 03:47:24,704 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2021-11-23 03:47:24,705 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:47:24,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:47:24,715 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:47:24,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:47:31,763 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2021-11-23 03:48:18,212 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2021-11-23 03:48:20,526 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 89 for LOIs [2021-11-23 03:48:21,185 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-23 03:48:21,199 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2021-11-23 03:48:24,755 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 442 for LOIs [2021-11-23 03:48:24,983 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 84 for LOIs [2021-11-23 03:48:25,126 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 98 for LOIs [2021-11-23 03:48:25,152 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2021-11-23 03:48:27,808 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs [2021-11-23 03:48:33,603 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 656 for LOIs [2021-11-23 03:48:34,032 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:48:50,072 WARN L227 SmtUtils]: Spent 9.23s on a formula simplification. DAG size of input: 656 DAG size of output: 519 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:49:01,026 WARN L227 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 696 DAG size of output: 533 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:49:07,422 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:49:13,830 WARN L227 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:49:33,584 WARN L227 SmtUtils]: Spent 18.36s on a formula simplification. DAG size of input: 829 DAG size of output: 681 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:49:41,856 WARN L227 SmtUtils]: Spent 7.15s on a formula simplification that was a NOOP. DAG size: 834 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:50:38,619 WARN L227 SmtUtils]: Spent 9.40s on a formula simplification. DAG size of input: 514 DAG size of output: 469 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:50:49,437 WARN L227 SmtUtils]: Spent 9.59s on a formula simplification. DAG size of input: 516 DAG size of output: 473 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:00,395 WARN L227 SmtUtils]: Spent 9.67s on a formula simplification. DAG size of input: 519 DAG size of output: 476 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:09,938 WARN L227 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 442 DAG size of output: 427 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:17,989 WARN L227 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 446 DAG size of output: 431 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:27,804 WARN L227 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 528 DAG size of output: 469 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:41,007 WARN L227 SmtUtils]: Spent 11.66s on a formula simplification. DAG size of input: 528 DAG size of output: 489 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:53,500 WARN L227 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 531 DAG size of output: 478 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:04,707 WARN L227 SmtUtils]: Spent 9.36s on a formula simplification. DAG size of input: 534 DAG size of output: 478 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:16,536 WARN L227 SmtUtils]: Spent 9.89s on a formula simplification. DAG size of input: 540 DAG size of output: 484 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:28,499 WARN L227 SmtUtils]: Spent 9.69s on a formula simplification. DAG size of input: 556 DAG size of output: 494 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:28,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [114814537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:28,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:52:28,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [11, 12, 12] total 84 [2021-11-23 03:52:28,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494217701] [2021-11-23 03:52:28,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:28,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 03:52:28,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 03:52:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=6424, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 03:52:28,508 INFO L87 Difference]: Start difference. First operand 1185 states and 1841 transitions. Second operand has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-23 03:52:36,242 WARN L227 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 640 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:44,257 WARN L227 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 652 DAG size of output: 601 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:50,407 WARN L227 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 744 DAG size of output: 660 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:52:56,707 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 603 DAG size of output: 557 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:53:03,575 WARN L227 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 615 DAG size of output: 564 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:53:53,960 WARN L227 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 433 DAG size of output: 430 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:54:01,293 WARN L227 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 446 DAG size of output: 443 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:55:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:15,584 INFO L93 Difference]: Finished difference Result 3010 states and 4710 transitions. [2021-11-23 03:55:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-23 03:55:15,601 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) Word has length 92 [2021-11-23 03:55:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:15,621 INFO L225 Difference]: With dead ends: 3010 [2021-11-23 03:55:15,621 INFO L226 Difference]: Without dead ends: 1848 [2021-11-23 03:55:15,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 202 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3210 ImplicationChecksByTransitivity, 303.0s TimeCoverageRelationStatistics Valid=689, Invalid=8431, Unknown=0, NotChecked=0, Total=9120 [2021-11-23 03:55:15,632 INFO L933 BasicCegarLoop]: 803 mSDtfsCounter, 868 mSDsluCounter, 11101 mSDsCounter, 0 mSdLazyCounter, 22429 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 11508 SdHoareTripleChecker+Invalid, 22556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 22429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:15,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 11508 Invalid, 22556 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [127 Valid, 22429 Invalid, 0 Unknown, 0 Unchecked, 98.3s Time] [2021-11-23 03:55:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2021-11-23 03:55:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1712. [2021-11-23 03:55:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1215 states have (on average 1.5209876543209877) internal successors, (1848), 1287 states have internal predecessors, (1848), 381 states have call successors, (381), 99 states have call predecessors, (381), 115 states have return successors, (416), 374 states have call predecessors, (416), 376 states have call successors, (416) [2021-11-23 03:55:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2645 transitions. [2021-11-23 03:55:16,043 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2645 transitions. Word has length 92 [2021-11-23 03:55:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:16,043 INFO L470 AbstractCegarLoop]: Abstraction has 1712 states and 2645 transitions. [2021-11-23 03:55:16,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 37 states have internal predecessors, (54), 16 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-23 03:55:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2645 transitions. [2021-11-23 03:55:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 03:55:16,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:16,048 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:16,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:16,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:55:16,266 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:16,266 INFO L85 PathProgramCache]: Analyzing trace with hash 231179816, now seen corresponding path program 1 times [2021-11-23 03:55:16,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:16,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984539387] [2021-11-23 03:55:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:16,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:55:16,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:16,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984539387] [2021-11-23 03:55:16,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984539387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:16,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:55:16,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:55:16,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678126017] [2021-11-23 03:55:16,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:16,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:55:16,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:55:16,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:16,425 INFO L87 Difference]: Start difference. First operand 1712 states and 2645 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 03:55:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:17,236 INFO L93 Difference]: Finished difference Result 4825 states and 7555 transitions. [2021-11-23 03:55:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:55:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2021-11-23 03:55:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:17,269 INFO L225 Difference]: With dead ends: 4825 [2021-11-23 03:55:17,269 INFO L226 Difference]: Without dead ends: 3260 [2021-11-23 03:55:17,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:17,280 INFO L933 BasicCegarLoop]: 982 mSDtfsCounter, 499 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:17,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 1473 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:55:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2021-11-23 03:55:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3257. [2021-11-23 03:55:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2313 states have (on average 1.5296152183311715) internal successors, (3538), 2451 states have internal predecessors, (3538), 726 states have call successors, (726), 185 states have call predecessors, (726), 217 states have return successors, (810), 718 states have call predecessors, (810), 721 states have call successors, (810) [2021-11-23 03:55:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 5074 transitions. [2021-11-23 03:55:18,134 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 5074 transitions. Word has length 93 [2021-11-23 03:55:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:18,135 INFO L470 AbstractCegarLoop]: Abstraction has 3257 states and 5074 transitions. [2021-11-23 03:55:18,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-23 03:55:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 5074 transitions. [2021-11-23 03:55:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 03:55:18,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:18,140 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:18,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:55:18,141 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:18,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1937125490, now seen corresponding path program 1 times [2021-11-23 03:55:18,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:18,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152812461] [2021-11-23 03:55:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:18,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 03:55:18,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152812461] [2021-11-23 03:55:18,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152812461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563702379] [2021-11-23 03:55:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:18,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:18,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:18,454 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:18,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695a7d25-f435-4135-802e-4fa92a34b3d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:55:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1812 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 03:55:18,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:55:20,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:55:23,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563702379] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:23,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [861690513] [2021-11-23 03:55:23,274 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2021-11-23 03:55:23,275 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:23,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:23,276 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:23,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:28,167 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2021-11-23 03:56:15,207 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2021-11-23 03:56:18,023 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 89 for LOIs [2021-11-23 03:56:18,728 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 28 for LOIs [2021-11-23 03:56:18,741 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2021-11-23 03:56:22,803 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 436 for LOIs [2021-11-23 03:56:23,075 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 84 for LOIs [2021-11-23 03:56:23,237 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 98 for LOIs [2021-11-23 03:56:23,266 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2021-11-23 03:56:26,654 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs [2021-11-23 03:56:33,041 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 656 for LOIs [2021-11-23 03:56:33,487 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:56:50,913 WARN L227 SmtUtils]: Spent 10.40s on a formula simplification. DAG size of input: 656 DAG size of output: 519 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:03,727 WARN L227 SmtUtils]: Spent 11.87s on a formula simplification. DAG size of input: 696 DAG size of output: 533 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:11,544 WARN L227 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:19,122 WARN L227 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:44,011 WARN L227 SmtUtils]: Spent 23.06s on a formula simplification. DAG size of input: 829 DAG size of output: 681 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:52,077 WARN L227 SmtUtils]: Spent 6.97s on a formula simplification that was a NOOP. DAG size: 834 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:55,993 WARN L227 SmtUtils]: Spent 10.36s on a formula simplification. DAG size of input: 508 DAG size of output: 455 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)