./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur --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 d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:16:14,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:16:14,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:16:14,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:16:14,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:16:14,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:16:14,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:16:14,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:16:14,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:16:14,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:16:14,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:16:14,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:16:14,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:16:14,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:16:14,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:16:14,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:16:14,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:16:14,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:16:14,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:16:14,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:16:14,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:16:14,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:16:14,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:16:14,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:16:14,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:16:14,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:16:14,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:16:14,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:16:14,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:16:14,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:16:14,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:16:14,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:16:14,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:16:14,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:16:14,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:16:14,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:16:14,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:16:14,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:16:14,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:16:14,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:16:14,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:16:14,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:16:14,521 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:16:14,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:16:14,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:16:14,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:16:14,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:16:14,523 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:16:14,524 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:16:14,524 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:16:14,524 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:16:14,524 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:16:14,526 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:16:14,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:16:14,526 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:16:14,527 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:16:14,527 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:16:14,527 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:16:14,527 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:16:14,528 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:16:14,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:16:14,529 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:16:14,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:16:14,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:16:14,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:16:14,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:16:14,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:16:14,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:16:14,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:16:14,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:16:14,532 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:16:14,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:16:14,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:16:14,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:16:14,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:16:14,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:16:14,533 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:16:14,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:16:14,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:16:14,534 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:16:14,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:16:14,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:16:14,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:16:14,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c [2022-11-25 22:16:14,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:16:14,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:16:14,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:16:14,894 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:16:14,894 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:16:14,895 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2022-11-25 22:16:18,050 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:16:18,431 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:16:18,453 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2022-11-25 22:16:18,524 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/data/019712486/5ee1d919cd6645c7a79d217eed7a3072/FLAGbb3ca948a [2022-11-25 22:16:18,551 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/data/019712486/5ee1d919cd6645c7a79d217eed7a3072 [2022-11-25 22:16:18,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:16:18,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:16:18,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:16:18,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:16:18,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:16:18,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:16:18" (1/1) ... [2022-11-25 22:16:18,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1e0ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:18, skipping insertion in model container [2022-11-25 22:16:18,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:16:18" (1/1) ... [2022-11-25 22:16:18,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:16:18,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:16:18,873 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2022-11-25 22:16:19,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:16:19,264 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:16:19,294 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2022-11-25 22:16:19,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:16:19,470 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:16:19,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19 WrapperNode [2022-11-25 22:16:19,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:16:19,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:16:19,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:16:19,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:16:19,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,571 INFO L138 Inliner]: procedures = 97, calls = 361, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 1010 [2022-11-25 22:16:19,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:16:19,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:16:19,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:16:19,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:16:19,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,662 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:16:19,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:16:19,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:16:19,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:16:19,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (1/1) ... [2022-11-25 22:16:19,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:16:19,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:19,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:16:19,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:16:19,773 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-25 22:16:19,773 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-25 22:16:19,774 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-25 22:16:19,774 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-25 22:16:19,774 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-25 22:16:19,775 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-25 22:16:19,775 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-25 22:16:19,775 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-25 22:16:19,775 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-25 22:16:19,775 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-25 22:16:19,775 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-25 22:16:19,776 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-25 22:16:19,776 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-25 22:16:19,776 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-25 22:16:19,776 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-25 22:16:19,776 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-25 22:16:19,777 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-25 22:16:19,777 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-25 22:16:19,777 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-25 22:16:19,777 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-25 22:16:19,778 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-25 22:16:19,778 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-25 22:16:19,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:16:19,779 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-25 22:16:19,779 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-25 22:16:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-25 22:16:19,780 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-25 22:16:19,780 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-25 22:16:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-25 22:16:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-25 22:16:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-25 22:16:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-25 22:16:19,781 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-25 22:16:19,781 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-25 22:16:19,782 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-25 22:16:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-25 22:16:19,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-25 22:16:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-25 22:16:19,782 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-25 22:16:19,782 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-25 22:16:19,783 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-25 22:16:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-25 22:16:19,783 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-25 22:16:19,783 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-25 22:16:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-25 22:16:19,784 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-25 22:16:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-25 22:16:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-25 22:16:19,786 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-25 22:16:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-25 22:16:19,787 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-25 22:16:19,787 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-25 22:16:19,787 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-25 22:16:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:16:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-25 22:16:19,788 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-25 22:16:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:16:19,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:16:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-25 22:16:19,789 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-25 22:16:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-25 22:16:19,789 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-25 22:16:20,036 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:16:20,039 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:16:21,181 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:16:22,065 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:16:22,065 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 22:16:22,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:16:22 BoogieIcfgContainer [2022-11-25 22:16:22,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:16:22,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:16:22,074 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:16:22,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:16:22,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:16:18" (1/3) ... [2022-11-25 22:16:22,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f73882b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:16:22, skipping insertion in model container [2022-11-25 22:16:22,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:16:19" (2/3) ... [2022-11-25 22:16:22,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f73882b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:16:22, skipping insertion in model container [2022-11-25 22:16:22,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:16:22" (3/3) ... [2022-11-25 22:16:22,083 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product32.cil.c [2022-11-25 22:16:22,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:16:22,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:16:22,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:16:22,188 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7e04f64d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:16:22,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:16:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2022-11-25 22:16:22,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 22:16:22,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:22,213 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:16:22,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:16:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash -176782080, now seen corresponding path program 1 times [2022-11-25 22:16:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:22,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953087383] [2022-11-25 22:16:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:22,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:16:23,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:23,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953087383] [2022-11-25 22:16:23,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953087383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:16:23,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369836498] [2022-11-25 22:16:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:23,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:23,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:23,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:23,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:16:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:23,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:16:23,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:23,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:23,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369836498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:23,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:16:23,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 22:16:23,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543049454] [2022-11-25 22:16:23,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:16:23,664 INFO L87 Difference]: Start difference. First operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-25 22:16:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:24,046 INFO L93 Difference]: Finished difference Result 1225 states and 1938 transitions. [2022-11-25 22:16:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:24,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2022-11-25 22:16:24,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:24,071 INFO L225 Difference]: With dead ends: 1225 [2022-11-25 22:16:24,080 INFO L226 Difference]: Without dead ends: 793 [2022-11-25 22:16:24,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:16:24,096 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 578 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:24,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 1385 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-25 22:16:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 781. [2022-11-25 22:16:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 523 states have (on average 1.5468451242829828) internal successors, (809), 558 states have internal predecessors, (809), 205 states have call successors, (205), 53 states have call predecessors, (205), 52 states have return successors, (207), 197 states have call predecessors, (207), 202 states have call successors, (207) [2022-11-25 22:16:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1221 transitions. [2022-11-25 22:16:24,254 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1221 transitions. Word has length 50 [2022-11-25 22:16:24,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:24,256 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1221 transitions. [2022-11-25 22:16:24,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-25 22:16:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1221 transitions. [2022-11-25 22:16:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 22:16:24,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:24,268 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:16:24,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:24,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 22:16:24,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:16:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1180145387, now seen corresponding path program 1 times [2022-11-25 22:16:24,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:24,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352808403] [2022-11-25 22:16:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:16:24,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:24,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352808403] [2022-11-25 22:16:24,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352808403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:16:24,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123055381] [2022-11-25 22:16:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:24,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:24,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:24,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:24,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:16:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:25,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:16:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:25,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:25,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123055381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:25,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:16:25,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 22:16:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774814749] [2022-11-25 22:16:25,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:25,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:25,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:25,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:16:25,273 INFO L87 Difference]: Start difference. First operand 781 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 22:16:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:25,541 INFO L93 Difference]: Finished difference Result 1915 states and 3024 transitions. [2022-11-25 22:16:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:25,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2022-11-25 22:16:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:25,556 INFO L225 Difference]: With dead ends: 1915 [2022-11-25 22:16:25,556 INFO L226 Difference]: Without dead ends: 1146 [2022-11-25 22:16:25,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:16:25,563 INFO L413 NwaCegarLoop]: 1077 mSDtfsCounter, 633 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:25,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1615 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-11-25 22:16:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1122. [2022-11-25 22:16:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 755 states have (on average 1.5536423841059603) internal successors, (1173), 807 states have internal predecessors, (1173), 292 states have call successors, (292), 74 states have call predecessors, (292), 74 states have return successors, (299), 282 states have call predecessors, (299), 289 states have call successors, (299) [2022-11-25 22:16:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1764 transitions. [2022-11-25 22:16:25,678 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1764 transitions. Word has length 49 [2022-11-25 22:16:25,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:25,679 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1764 transitions. [2022-11-25 22:16:25,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 22:16:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1764 transitions. [2022-11-25 22:16:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 22:16:25,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:25,683 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 22:16:25,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:25,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:25,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:16:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1524168596, now seen corresponding path program 1 times [2022-11-25 22:16:25,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:25,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638100423] [2022-11-25 22:16:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:25,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:16:26,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:26,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638100423] [2022-11-25 22:16:26,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638100423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:26,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:26,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:16:26,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233447581] [2022-11-25 22:16:26,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:26,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:26,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:26,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:26,259 INFO L87 Difference]: Start difference. First operand 1122 states and 1764 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:16:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:26,672 INFO L93 Difference]: Finished difference Result 3336 states and 5296 transitions. [2022-11-25 22:16:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-11-25 22:16:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:26,691 INFO L225 Difference]: With dead ends: 3336 [2022-11-25 22:16:26,691 INFO L226 Difference]: Without dead ends: 2226 [2022-11-25 22:16:26,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:26,699 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 633 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:26,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1388 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:26,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-11-25 22:16:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2108. [2022-11-25 22:16:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1461 states have (on average 1.57015742642026) internal successors, (2294), 1542 states have internal predecessors, (2294), 515 states have call successors, (515), 130 states have call predecessors, (515), 131 states have return successors, (550), 480 states have call predecessors, (550), 511 states have call successors, (550) [2022-11-25 22:16:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3359 transitions. [2022-11-25 22:16:26,831 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3359 transitions. Word has length 50 [2022-11-25 22:16:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:26,834 INFO L495 AbstractCegarLoop]: Abstraction has 2108 states and 3359 transitions. [2022-11-25 22:16:26,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 22:16:26,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3359 transitions. [2022-11-25 22:16:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 22:16:26,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:26,842 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:26,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:16:26,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:16:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash -470509726, now seen corresponding path program 1 times [2022-11-25 22:16:26,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:26,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447976205] [2022-11-25 22:16:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:26,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:16:27,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:27,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447976205] [2022-11-25 22:16:27,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447976205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:27,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:27,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 22:16:27,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51675898] [2022-11-25 22:16:27,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:27,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:16:27,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:27,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:16:27,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:16:27,191 INFO L87 Difference]: Start difference. First operand 2108 states and 3359 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:16:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:27,561 INFO L93 Difference]: Finished difference Result 4905 states and 7770 transitions. [2022-11-25 22:16:27,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:16:27,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 93 [2022-11-25 22:16:27,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:27,585 INFO L225 Difference]: With dead ends: 4905 [2022-11-25 22:16:27,585 INFO L226 Difference]: Without dead ends: 2809 [2022-11-25 22:16:27,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:16:27,599 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 468 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:27,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1788 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2022-11-25 22:16:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2765. [2022-11-25 22:16:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 1899 states have (on average 1.517114270668773) internal successors, (2881), 1987 states have internal predecessors, (2881), 662 states have call successors, (662), 188 states have call predecessors, (662), 203 states have return successors, (790), 631 states have call predecessors, (790), 656 states have call successors, (790) [2022-11-25 22:16:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 4333 transitions. [2022-11-25 22:16:27,881 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 4333 transitions. Word has length 93 [2022-11-25 22:16:27,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:27,881 INFO L495 AbstractCegarLoop]: Abstraction has 2765 states and 4333 transitions. [2022-11-25 22:16:27,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:16:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 4333 transitions. [2022-11-25 22:16:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-25 22:16:27,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:27,888 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:27,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:16:27,888 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:16:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1707177976, now seen corresponding path program 1 times [2022-11-25 22:16:27,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:27,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236726333] [2022-11-25 22:16:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:27,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:16:28,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:28,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236726333] [2022-11-25 22:16:28,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236726333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:28,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:28,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 22:16:28,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944907047] [2022-11-25 22:16:28,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:28,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:16:28,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:28,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:16:28,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:16:28,305 INFO L87 Difference]: Start difference. First operand 2765 states and 4333 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:16:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:29,588 INFO L93 Difference]: Finished difference Result 7201 states and 11765 transitions. [2022-11-25 22:16:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:16:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2022-11-25 22:16:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:29,622 INFO L225 Difference]: With dead ends: 7201 [2022-11-25 22:16:29,622 INFO L226 Difference]: Without dead ends: 4448 [2022-11-25 22:16:29,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-25 22:16:29,648 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 707 mSDsluCounter, 2764 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 3561 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:29,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 3561 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:16:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-11-25 22:16:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4035. [2022-11-25 22:16:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 2777 states have (on average 1.5084623694634498) internal successors, (4189), 2916 states have internal predecessors, (4189), 955 states have call successors, (955), 279 states have call predecessors, (955), 302 states have return successors, (1236), 905 states have call predecessors, (1236), 947 states have call successors, (1236) [2022-11-25 22:16:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6380 transitions. [2022-11-25 22:16:30,037 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6380 transitions. Word has length 94 [2022-11-25 22:16:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:30,038 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 6380 transitions. [2022-11-25 22:16:30,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-25 22:16:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6380 transitions. [2022-11-25 22:16:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 22:16:30,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:30,048 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:30,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 22:16:30,048 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:16:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:30,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1493767023, now seen corresponding path program 1 times [2022-11-25 22:16:30,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:30,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385320120] [2022-11-25 22:16:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:30,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 22:16:30,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385320120] [2022-11-25 22:16:30,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385320120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:16:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139985297] [2022-11-25 22:16:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:30,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:30,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:30,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:16:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:30,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:16:30,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 22:16:30,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:30,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139985297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:30,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:16:30,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-25 22:16:30,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121382100] [2022-11-25 22:16:30,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:30,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:16:30,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:30,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:16:30,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:16:30,958 INFO L87 Difference]: Start difference. First operand 4035 states and 6380 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-25 22:16:32,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:32,259 INFO L93 Difference]: Finished difference Result 10586 states and 17287 transitions. [2022-11-25 22:16:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:16:32,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2022-11-25 22:16:32,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:32,305 INFO L225 Difference]: With dead ends: 10586 [2022-11-25 22:16:32,305 INFO L226 Difference]: Without dead ends: 6563 [2022-11-25 22:16:32,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:16:32,340 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 562 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 3054 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:32,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 3054 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 22:16:32,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2022-11-25 22:16:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 6332. [2022-11-25 22:16:32,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6332 states, 4360 states have (on average 1.4697247706422019) internal successors, (6408), 4591 states have internal predecessors, (6408), 1486 states have call successors, (1486), 459 states have call predecessors, (1486), 485 states have return successors, (1983), 1387 states have call predecessors, (1983), 1475 states have call successors, (1983) [2022-11-25 22:16:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6332 states to 6332 states and 9877 transitions. [2022-11-25 22:16:32,881 INFO L78 Accepts]: Start accepts. Automaton has 6332 states and 9877 transitions. Word has length 95 [2022-11-25 22:16:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:32,884 INFO L495 AbstractCegarLoop]: Abstraction has 6332 states and 9877 transitions. [2022-11-25 22:16:32,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-25 22:16:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 6332 states and 9877 transitions. [2022-11-25 22:16:32,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-25 22:16:32,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:32,889 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:32,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:33,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 22:16:33,103 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:16:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash -513258118, now seen corresponding path program 1 times [2022-11-25 22:16:33,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:33,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114028109] [2022-11-25 22:16:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:33,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 22:16:33,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:33,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114028109] [2022-11-25 22:16:33,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114028109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:16:33,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022224239] [2022-11-25 22:16:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:33,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:33,457 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:33,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:16:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:33,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:16:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 22:16:33,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:33,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022224239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:33,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:16:33,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-25 22:16:33,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485231043] [2022-11-25 22:16:33,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:33,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:33,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:16:33,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:33,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:16:33,978 INFO L87 Difference]: Start difference. First operand 6332 states and 9877 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-25 22:16:34,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:34,631 INFO L93 Difference]: Finished difference Result 14110 states and 22337 transitions. [2022-11-25 22:16:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:34,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2022-11-25 22:16:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:34,695 INFO L225 Difference]: With dead ends: 14110 [2022-11-25 22:16:34,695 INFO L226 Difference]: Without dead ends: 7790 [2022-11-25 22:16:34,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:16:34,735 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 594 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:34,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1359 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:16:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2022-11-25 22:16:35,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6225. [2022-11-25 22:16:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6225 states, 4288 states have (on average 1.4640858208955223) internal successors, (6278), 4517 states have internal predecessors, (6278), 1466 states have call successors, (1466), 450 states have call predecessors, (1466), 470 states have return successors, (1907), 1363 states have call predecessors, (1907), 1455 states have call successors, (1907) [2022-11-25 22:16:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6225 states to 6225 states and 9651 transitions. [2022-11-25 22:16:35,318 INFO L78 Accepts]: Start accepts. Automaton has 6225 states and 9651 transitions. Word has length 94 [2022-11-25 22:16:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:35,319 INFO L495 AbstractCegarLoop]: Abstraction has 6225 states and 9651 transitions. [2022-11-25 22:16:35,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-25 22:16:35,320 INFO L276 IsEmpty]: Start isEmpty. Operand 6225 states and 9651 transitions. [2022-11-25 22:16:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-25 22:16:35,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:35,326 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:35,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 22:16:35,534 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:16:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1341273073, now seen corresponding path program 1 times [2022-11-25 22:16:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:16:35,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257031618] [2022-11-25 22:16:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:35,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:16:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:16:36,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:16:36,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257031618] [2022-11-25 22:16:36,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257031618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:16:36,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920709143] [2022-11-25 22:16:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:36,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:36,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:36,380 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:36,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:16:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:36,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 22:16:36,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 22:16:37,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 22:16:37,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920709143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:37,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [25967427] [2022-11-25 22:16:37,725 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-25 22:16:37,725 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:16:37,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:16:37,735 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:16:37,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:16:44,610 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-25 22:16:52,697 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2022-11-25 22:16:53,049 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-25 22:16:55,167 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-25 22:16:55,355 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-25 22:16:55,426 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-25 22:16:55,497 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-25 22:16:59,350 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-25 22:16:59,992 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-25 22:17:00,134 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:17:34,624 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:17:42,228 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:17:51,221 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:18:10,502 WARN L233 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:18:16,742 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 622 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:18:25,177 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:18:31,568 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 628 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:18:38,456 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 511 DAG size of output: 480 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:18:44,650 WARN L233 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 547 DAG size of output: 487 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:18:51,218 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:18:57,801 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 632 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:05,605 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 637 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:12,271 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:12,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [25967427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:19:12,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:19:12,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2022-11-25 22:19:12,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001534386] [2022-11-25 22:19:12,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:19:12,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 22:19:12,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:19:12,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 22:19:12,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 22:19:12,283 INFO L87 Difference]: Start difference. First operand 6225 states and 9651 transitions. Second operand has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-25 22:19:19,201 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:25,692 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:32,105 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:37,959 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:44,447 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 642 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:50,631 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 648 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:20:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:20:34,432 INFO L93 Difference]: Finished difference Result 12589 states and 19521 transitions. [2022-11-25 22:20:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 22:20:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2022-11-25 22:20:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:20:34,477 INFO L225 Difference]: With dead ends: 12589 [2022-11-25 22:20:34,477 INFO L226 Difference]: Without dead ends: 6376 [2022-11-25 22:20:34,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 168.0s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 22:20:34,503 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 295 mSDsluCounter, 3543 mSDsCounter, 0 mSdLazyCounter, 7878 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 4165 SdHoareTripleChecker+Invalid, 7963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 7878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:20:34,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 4165 Invalid, 7963 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [85 Valid, 7878 Invalid, 0 Unknown, 0 Unchecked, 45.7s Time] [2022-11-25 22:20:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6376 states. [2022-11-25 22:20:35,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6376 to 6297. [2022-11-25 22:20:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6297 states, 4338 states have (on average 1.4603503918856615) internal successors, (6335), 4566 states have internal predecessors, (6335), 1481 states have call successors, (1481), 459 states have call predecessors, (1481), 477 states have return successors, (1923), 1377 states have call predecessors, (1923), 1470 states have call successors, (1923) [2022-11-25 22:20:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6297 states to 6297 states and 9739 transitions. [2022-11-25 22:20:35,178 INFO L78 Accepts]: Start accepts. Automaton has 6297 states and 9739 transitions. Word has length 100 [2022-11-25 22:20:35,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:20:35,179 INFO L495 AbstractCegarLoop]: Abstraction has 6297 states and 9739 transitions. [2022-11-25 22:20:35,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-25 22:20:35,179 INFO L276 IsEmpty]: Start isEmpty. Operand 6297 states and 9739 transitions. [2022-11-25 22:20:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-25 22:20:35,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:20:35,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:20:35,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:20:35,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:35,392 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:20:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:20:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash -42572340, now seen corresponding path program 1 times [2022-11-25 22:20:35,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:20:35,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326101790] [2022-11-25 22:20:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:35,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:20:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:20:35,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:20:35,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326101790] [2022-11-25 22:20:35,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326101790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:20:35,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627081597] [2022-11-25 22:20:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:20:35,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:20:35,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:20:35,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:20:35,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:20:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:20:36,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 22:20:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:20:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 22:20:36,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:20:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 22:20:36,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627081597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:36,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952616136] [2022-11-25 22:20:36,904 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2022-11-25 22:20:36,904 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:20:36,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:20:36,905 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:20:36,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:20:41,346 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-25 22:20:50,851 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2022-11-25 22:20:50,862 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-25 22:20:53,012 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-25 22:20:53,204 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-25 22:20:53,297 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-25 22:20:53,382 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-25 22:20:57,051 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-25 22:20:57,747 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-25 22:20:57,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:21:31,815 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:21:39,388 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:21:48,264 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:07,314 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:13,566 WARN L233 SmtUtils]: Spent 5.85s on a formula simplification. DAG size of input: 624 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:21,944 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:28,332 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 628 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:36,446 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:43,031 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 634 DAG size of output: 603 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:50,802 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 637 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:57,464 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 635 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:23:05,314 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 640 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:23:12,029 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 638 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:23:12,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1952616136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:23:12,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:23:12,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2022-11-25 22:23:12,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619175693] [2022-11-25 22:23:12,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:23:12,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 22:23:12,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:23:12,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 22:23:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 22:23:12,044 INFO L87 Difference]: Start difference. First operand 6297 states and 9739 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-25 22:23:19,194 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:23:25,675 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:23:31,983 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:23:37,745 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:23:43,684 WARN L233 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 605 DAG size of output: 585 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:23:49,306 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 611 DAG size of output: 591 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:24:39,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:39,095 INFO L93 Difference]: Finished difference Result 12567 states and 19482 transitions. [2022-11-25 22:24:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 22:24:39,096 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2022-11-25 22:24:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:39,132 INFO L225 Difference]: With dead ends: 12567 [2022-11-25 22:24:39,132 INFO L226 Difference]: Without dead ends: 6366 [2022-11-25 22:24:39,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 168.8s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 22:24:39,163 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 146 mSDsluCounter, 5247 mSDsCounter, 0 mSdLazyCounter, 9229 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 5864 SdHoareTripleChecker+Invalid, 9258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 9229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:39,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 5864 Invalid, 9258 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [29 Valid, 9229 Invalid, 0 Unknown, 0 Unchecked, 51.8s Time] [2022-11-25 22:24:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2022-11-25 22:24:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 6299. [2022-11-25 22:24:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 4339 states have (on average 1.460013828070984) internal successors, (6335), 4567 states have internal predecessors, (6335), 1481 states have call successors, (1481), 460 states have call predecessors, (1481), 478 states have return successors, (1923), 1377 states have call predecessors, (1923), 1470 states have call successors, (1923) [2022-11-25 22:24:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 9739 transitions. [2022-11-25 22:24:39,841 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 9739 transitions. Word has length 106 [2022-11-25 22:24:39,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:39,842 INFO L495 AbstractCegarLoop]: Abstraction has 6299 states and 9739 transitions. [2022-11-25 22:24:39,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-25 22:24:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 9739 transitions. [2022-11-25 22:24:39,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-25 22:24:39,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:39,845 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:39,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:40,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:40,058 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1189956417, now seen corresponding path program 1 times [2022-11-25 22:24:40,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:40,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072352074] [2022-11-25 22:24:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:40,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 22:24:40,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072352074] [2022-11-25 22:24:40,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072352074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:40,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387412799] [2022-11-25 22:24:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:40,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:40,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:40,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:40,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:24:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:40,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 22:24:40,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 22:24:41,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 22:24:41,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387412799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2006624841] [2022-11-25 22:24:41,494 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-11-25 22:24:41,494 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:41,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:41,495 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:41,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:45,192 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-11-25 22:24:55,447 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2022-11-25 22:24:55,639 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-11-25 22:24:57,625 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-11-25 22:24:57,811 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-11-25 22:24:57,880 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-11-25 22:24:57,949 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-11-25 22:25:01,351 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-11-25 22:25:01,948 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-11-25 22:25:02,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:36,061 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:25:43,594 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:25:52,443 WARN L233 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 780 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:26:11,415 WARN L233 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 622 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:26:17,595 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 622 DAG size of output: 597 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:26:25,921 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:26:32,320 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 630 DAG size of output: 600 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:26:47,642 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 634 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:26:54,172 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 632 DAG size of output: 602 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:01,907 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 637 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:08,543 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 637 DAG size of output: 604 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:16,412 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 640 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:23,131 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 640 DAG size of output: 605 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:31,197 WARN L233 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 643 DAG size of output: 607 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:37,985 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 641 DAG size of output: 606 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:37,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2006624841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:27:37,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:27:37,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2022-11-25 22:27:37,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418744742] [2022-11-25 22:27:37,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:27:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 22:27:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:27:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 22:27:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 22:27:37,997 INFO L87 Difference]: Start difference. First operand 6299 states and 9739 transitions. Second operand has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-25 22:27:45,464 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 618 DAG size of output: 583 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:51,940 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 624 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:58,495 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:04,335 WARN L233 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 605 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:13,384 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:28:22,048 WARN L233 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:27,544 INFO L93 Difference]: Finished difference Result 12568 states and 19471 transitions. [2022-11-25 22:29:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 22:29:27,545 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 112 [2022-11-25 22:29:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:27,574 INFO L225 Difference]: With dead ends: 12568 [2022-11-25 22:29:27,575 INFO L226 Difference]: Without dead ends: 6367 [2022-11-25 22:29:27,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 284 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 196.4s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 22:29:27,598 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 148 mSDsluCounter, 5253 mSDsCounter, 0 mSdLazyCounter, 11220 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 5750 SdHoareTripleChecker+Invalid, 11250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:27,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 5750 Invalid, 11250 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [30 Valid, 11220 Invalid, 0 Unknown, 0 Unchecked, 68.3s Time] [2022-11-25 22:29:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2022-11-25 22:29:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6300. [2022-11-25 22:29:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6300 states, 4340 states have (on average 1.4596774193548387) internal successors, (6335), 4568 states have internal predecessors, (6335), 1480 states have call successors, (1480), 461 states have call predecessors, (1480), 479 states have return successors, (1913), 1376 states have call predecessors, (1913), 1469 states have call successors, (1913) [2022-11-25 22:29:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 9728 transitions. [2022-11-25 22:29:28,232 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 9728 transitions. Word has length 112 [2022-11-25 22:29:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:28,233 INFO L495 AbstractCegarLoop]: Abstraction has 6300 states and 9728 transitions. [2022-11-25 22:29:28,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-25 22:29:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 9728 transitions. [2022-11-25 22:29:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-25 22:29:28,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:28,244 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:28,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:29:28,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:29:28,453 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:29:28,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:28,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1025115771, now seen corresponding path program 1 times [2022-11-25 22:29:28,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:28,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649081987] [2022-11-25 22:29:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:28,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-25 22:29:28,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:28,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649081987] [2022-11-25 22:29:28,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649081987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:28,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682641376] [2022-11-25 22:29:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:28,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:28,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:28,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:28,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:29:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:29,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 22:29:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 22:29:29,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:29:29,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682641376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:29,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:29:29,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2022-11-25 22:29:29,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738155118] [2022-11-25 22:29:29,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:29,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:29:29,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:29:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:29:29,615 INFO L87 Difference]: Start difference. First operand 6300 states and 9728 transitions. Second operand has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-25 22:29:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:34,688 INFO L93 Difference]: Finished difference Result 15939 states and 25319 transitions. [2022-11-25 22:29:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 22:29:34,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 183 [2022-11-25 22:29:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:34,751 INFO L225 Difference]: With dead ends: 15939 [2022-11-25 22:29:34,751 INFO L226 Difference]: Without dead ends: 9744 [2022-11-25 22:29:34,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 22:29:34,791 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 1688 mSDsluCounter, 2570 mSDsCounter, 0 mSdLazyCounter, 6846 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 7677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:34,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1708 Valid, 3138 Invalid, 7677 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [831 Valid, 6846 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-25 22:29:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2022-11-25 22:29:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 8733. [2022-11-25 22:29:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8733 states, 5998 states have (on average 1.444648216072024) internal successors, (8665), 6272 states have internal predecessors, (8665), 2032 states have call successors, (2032), 703 states have call predecessors, (2032), 702 states have return successors, (2712), 1897 states have call predecessors, (2712), 2013 states have call successors, (2712) [2022-11-25 22:29:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8733 states to 8733 states and 13409 transitions. [2022-11-25 22:29:35,736 INFO L78 Accepts]: Start accepts. Automaton has 8733 states and 13409 transitions. Word has length 183 [2022-11-25 22:29:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:35,737 INFO L495 AbstractCegarLoop]: Abstraction has 8733 states and 13409 transitions. [2022-11-25 22:29:35,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-25 22:29:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 8733 states and 13409 transitions. [2022-11-25 22:29:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-25 22:29:35,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:35,748 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:35,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:29:35,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:35,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:29:35,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:35,958 INFO L85 PathProgramCache]: Analyzing trace with hash -170009016, now seen corresponding path program 1 times [2022-11-25 22:29:35,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:35,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367549980] [2022-11-25 22:29:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-25 22:29:36,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:36,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367549980] [2022-11-25 22:29:36,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367549980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:36,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139821394] [2022-11-25 22:29:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:36,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:36,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:36,427 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:36,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:29:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:29:36,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-25 22:29:36,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:29:36,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139821394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:29:36,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:29:36,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-11-25 22:29:36,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356677592] [2022-11-25 22:29:36,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:29:36,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:29:36,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:29:36,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:29:36,960 INFO L87 Difference]: Start difference. First operand 8733 states and 13409 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-25 22:29:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:37,860 INFO L93 Difference]: Finished difference Result 15691 states and 24635 transitions. [2022-11-25 22:29:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:29:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 183 [2022-11-25 22:29:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:37,912 INFO L225 Difference]: With dead ends: 15691 [2022-11-25 22:29:37,912 INFO L226 Difference]: Without dead ends: 9064 [2022-11-25 22:29:37,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:29:37,947 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 33 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:37,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1256 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:29:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2022-11-25 22:29:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 8817. [2022-11-25 22:29:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 6070 states have (on average 1.4413509060955518) internal successors, (8749), 6344 states have internal predecessors, (8749), 2044 states have call successors, (2044), 703 states have call predecessors, (2044), 702 states have return successors, (2724), 1909 states have call predecessors, (2724), 2025 states have call successors, (2724) [2022-11-25 22:29:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 13517 transitions. [2022-11-25 22:29:38,704 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 13517 transitions. Word has length 183 [2022-11-25 22:29:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:38,705 INFO L495 AbstractCegarLoop]: Abstraction has 8817 states and 13517 transitions. [2022-11-25 22:29:38,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-25 22:29:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 13517 transitions. [2022-11-25 22:29:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-25 22:29:38,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:38,717 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:29:38,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:29:38,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:38,926 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:29:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1778481971, now seen corresponding path program 1 times [2022-11-25 22:29:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:38,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670438012] [2022-11-25 22:29:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:38,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-25 22:29:39,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:39,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670438012] [2022-11-25 22:29:39,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670438012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993975047] [2022-11-25 22:29:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:39,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:39,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:39,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:39,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_806a4142-c525-430d-be52-6697563fcfd5/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:29:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:39,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 22:29:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 22:29:40,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-25 22:29:40,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993975047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:40,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060811686] [2022-11-25 22:29:40,823 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-11-25 22:29:40,823 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:40,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:40,824 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:40,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:47,643 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs