./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b7f63e91390dfc262975e205f156f8c4cc9b5ede7dbe2a20685844995f7cce81 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:50:05,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:50:05,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:50:05,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:50:05,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:50:05,518 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:50:05,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:50:05,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:50:05,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:50:05,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:50:05,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:50:05,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:50:05,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:50:05,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:50:05,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:50:05,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:50:05,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:50:05,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:50:05,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:50:05,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:50:05,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:50:05,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:50:05,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:50:05,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:50:05,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:50:05,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:50:05,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:50:05,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:50:05,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:50:05,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:50:05,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:50:05,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:50:05,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:50:05,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:50:05,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:50:05,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:50:05,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:50:05,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:50:05,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:50:05,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:50:05,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:50:05,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:50:05,564 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:50:05,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:50:05,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:50:05,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:50:05,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:50:05,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:50:05,565 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:50:05,565 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:50:05,565 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:50:05,565 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:50:05,566 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:50:05,566 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:50:05,566 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:50:05,566 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:50:05,566 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:50:05,567 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:50:05,567 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:50:05,567 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:50:05,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:50:05,568 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:50:05,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:50:05,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:50:05,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:50:05,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:50:05,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:50:05,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:50:05,569 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:50:05,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:50:05,569 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:50:05,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:50:05,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:50:05,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:50:05,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:50:05,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:50:05,570 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:50:05,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:50:05,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:50:05,571 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:50:05,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:50:05,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:50:05,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:50:05,571 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_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7f63e91390dfc262975e205f156f8c4cc9b5ede7dbe2a20685844995f7cce81 [2022-12-14 05:50:05,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:50:05,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:50:05,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:50:05,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:50:05,785 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:50:05,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c [2022-12-14 05:50:08,420 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:50:08,668 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:50:08,669 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c [2022-12-14 05:50:08,685 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/data/b90ef7a42/6b963f67df664be4bbe002242e1b18e9/FLAG356948f5d [2022-12-14 05:50:08,697 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/data/b90ef7a42/6b963f67df664be4bbe002242e1b18e9 [2022-12-14 05:50:08,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:50:08,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:50:08,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:50:08,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:50:08,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:50:08,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:50:08" (1/1) ... [2022-12-14 05:50:08,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33d7a37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:08, skipping insertion in model container [2022-12-14 05:50:08,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:50:08" (1/1) ... [2022-12-14 05:50:08,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:50:08,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:50:09,146 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_8f975802-3232-4a61-b6d9-9b8ddcb97c22/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c[62576,62589] [2022-12-14 05:50:09,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:50:09,188 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:50:09,267 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_8f975802-3232-4a61-b6d9-9b8ddcb97c22/sv-benchmarks/c/product-lines/elevator_spec3_product20.cil.c[62576,62589] [2022-12-14 05:50:09,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:50:09,301 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:50:09,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09 WrapperNode [2022-12-14 05:50:09,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:50:09,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:50:09,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:50:09,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:50:09,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,374 INFO L138 Inliner]: procedures = 94, calls = 352, calls flagged for inlining = 25, calls inlined = 21, statements flattened = 1112 [2022-12-14 05:50:09,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:50:09,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:50:09,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:50:09,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:50:09,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,424 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:50:09,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:50:09,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:50:09,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:50:09,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (1/1) ... [2022-12-14 05:50:09,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:50:09,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:09,469 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:50:09,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:50:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:50:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 05:50:09,504 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 05:50:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 05:50:09,505 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 05:50:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 05:50:09,505 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-12-14 05:50:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 05:50:09,505 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 05:50:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 05:50:09,505 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 05:50:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 05:50:09,506 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 05:50:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 05:50:09,506 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 05:50:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 05:50:09,506 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 05:50:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 05:50:09,506 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 05:50:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 05:50:09,507 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 05:50:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 05:50:09,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 05:50:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 05:50:09,507 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 05:50:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 05:50:09,507 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 05:50:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 05:50:09,508 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 05:50:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 05:50:09,508 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 05:50:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 05:50:09,508 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 05:50:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 05:50:09,508 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 05:50:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 05:50:09,509 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 05:50:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 05:50:09,517 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 05:50:09,518 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 05:50:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 05:50:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 05:50:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 05:50:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 05:50:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 05:50:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:50:09,519 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 05:50:09,519 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 05:50:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 05:50:09,520 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 05:50:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 05:50:09,520 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 05:50:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 05:50:09,520 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 05:50:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:50:09,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:50:09,520 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 05:50:09,521 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 05:50:09,521 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-12-14 05:50:09,521 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-12-14 05:50:09,645 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:50:09,647 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:50:10,411 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:50:10,882 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:50:10,883 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 05:50:10,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:50:10 BoogieIcfgContainer [2022-12-14 05:50:10,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:50:10,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:50:10,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:50:10,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:50:10,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:50:08" (1/3) ... [2022-12-14 05:50:10,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27112d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:50:10, skipping insertion in model container [2022-12-14 05:50:10,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:50:09" (2/3) ... [2022-12-14 05:50:10,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27112d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:50:10, skipping insertion in model container [2022-12-14 05:50:10,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:50:10" (3/3) ... [2022-12-14 05:50:10,891 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product20.cil.c [2022-12-14 05:50:10,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:50:10,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:50:10,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:50:10,967 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;@173d3b2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:50:10,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:50:10,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2022-12-14 05:50:10,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 05:50:10,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:10,981 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] [2022-12-14 05:50:10,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash 469669908, now seen corresponding path program 1 times [2022-12-14 05:50:10,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:10,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952038596] [2022-12-14 05:50:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:10,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:50:11,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:11,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952038596] [2022-12-14 05:50:11,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952038596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:11,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401184443] [2022-12-14 05:50:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:11,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:11,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:11,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:11,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:50:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:11,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:50:11,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:11,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:11,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401184443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:11,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:11,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:50:11,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100344373] [2022-12-14 05:50:11,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:11,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:50:11,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:50:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:11,779 INFO L87 Difference]: Start difference. First operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) 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) [2022-12-14 05:50:12,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:12,052 INFO L93 Difference]: Finished difference Result 1174 states and 1866 transitions. [2022-12-14 05:50:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:50:12,054 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 [2022-12-14 05:50:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:12,073 INFO L225 Difference]: With dead ends: 1174 [2022-12-14 05:50:12,073 INFO L226 Difference]: Without dead ends: 759 [2022-12-14 05:50:12,080 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 [2022-12-14 05:50:12,083 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 554 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:12,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1328 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-12-14 05:50:12,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 747. [2022-12-14 05:50:12,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 501 states have (on average 1.558882235528942) internal successors, (781), 536 states have internal predecessors, (781), 195 states have call successors, (195), 51 states have call predecessors, (195), 50 states have return successors, (197), 187 states have call predecessors, (197), 192 states have call successors, (197) [2022-12-14 05:50:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1173 transitions. [2022-12-14 05:50:12,180 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1173 transitions. Word has length 50 [2022-12-14 05:50:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:12,181 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1173 transitions. [2022-12-14 05:50:12,181 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) [2022-12-14 05:50:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1173 transitions. [2022-12-14 05:50:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 05:50:12,183 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:12,184 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] [2022-12-14 05:50:12,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:50:12,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 05:50:12,385 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1814885608, now seen corresponding path program 1 times [2022-12-14 05:50:12,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:12,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627559614] [2022-12-14 05:50:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:12,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:50:12,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627559614] [2022-12-14 05:50:12,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627559614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656188795] [2022-12-14 05:50:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:12,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:12,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:12,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:12,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:50:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:13,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:50:13,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:13,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:13,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656188795] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:13,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:13,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:50:13,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849518340] [2022-12-14 05:50:13,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:13,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:50:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:50:13,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:13,037 INFO L87 Difference]: Start difference. First operand 747 states and 1173 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) [2022-12-14 05:50:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:13,195 INFO L93 Difference]: Finished difference Result 1830 states and 2904 transitions. [2022-12-14 05:50:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:50:13,196 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 [2022-12-14 05:50:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:13,205 INFO L225 Difference]: With dead ends: 1830 [2022-12-14 05:50:13,205 INFO L226 Difference]: Without dead ends: 1095 [2022-12-14 05:50:13,209 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 [2022-12-14 05:50:13,211 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 609 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:13,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1206 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2022-12-14 05:50:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1071. [2022-12-14 05:50:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 722 states have (on average 1.5664819944598338) internal successors, (1131), 774 states have internal predecessors, (1131), 277 states have call successors, (277), 71 states have call predecessors, (277), 71 states have return successors, (284), 267 states have call predecessors, (284), 274 states have call successors, (284) [2022-12-14 05:50:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1692 transitions. [2022-12-14 05:50:13,283 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1692 transitions. Word has length 49 [2022-12-14 05:50:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:13,284 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1692 transitions. [2022-12-14 05:50:13,284 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) [2022-12-14 05:50:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1692 transitions. [2022-12-14 05:50:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 05:50:13,286 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:13,286 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] [2022-12-14 05:50:13,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:50:13,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:13,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:13,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2124346712, now seen corresponding path program 1 times [2022-12-14 05:50:13,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:13,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93618084] [2022-12-14 05:50:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:13,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:50:13,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:13,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93618084] [2022-12-14 05:50:13,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93618084] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:13,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:13,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:50:13,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646077850] [2022-12-14 05:50:13,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:13,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:50:13,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:50:13,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:50:13,723 INFO L87 Difference]: Start difference. First operand 1071 states and 1692 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) [2022-12-14 05:50:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:14,016 INFO L93 Difference]: Finished difference Result 3183 states and 5080 transitions. [2022-12-14 05:50:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:50:14,016 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 [2022-12-14 05:50:14,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:14,030 INFO L225 Difference]: With dead ends: 3183 [2022-12-14 05:50:14,030 INFO L226 Difference]: Without dead ends: 2124 [2022-12-14 05:50:14,035 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 [2022-12-14 05:50:14,036 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 609 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:14,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1339 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:50:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-12-14 05:50:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2006. [2022-12-14 05:50:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 1395 states have (on average 1.5842293906810037) internal successors, (2210), 1476 states have internal predecessors, (2210), 485 states have call successors, (485), 124 states have call predecessors, (485), 125 states have return successors, (520), 450 states have call predecessors, (520), 481 states have call successors, (520) [2022-12-14 05:50:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3215 transitions. [2022-12-14 05:50:14,160 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3215 transitions. Word has length 50 [2022-12-14 05:50:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:14,160 INFO L495 AbstractCegarLoop]: Abstraction has 2006 states and 3215 transitions. [2022-12-14 05:50:14,160 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) [2022-12-14 05:50:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3215 transitions. [2022-12-14 05:50:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 05:50:14,167 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:14,168 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] [2022-12-14 05:50:14,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 05:50:14,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:14,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1313121999, now seen corresponding path program 1 times [2022-12-14 05:50:14,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:14,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741643167] [2022-12-14 05:50:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:14,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:50:14,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741643167] [2022-12-14 05:50:14,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741643167] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:14,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:14,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:50:14,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220681869] [2022-12-14 05:50:14,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:14,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:50:14,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:14,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:50:14,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:50:14,565 INFO L87 Difference]: Start difference. First operand 2006 states and 3215 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) [2022-12-14 05:50:15,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:15,321 INFO L93 Difference]: Finished difference Result 5110 states and 8423 transitions. [2022-12-14 05:50:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 05:50:15,322 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 [2022-12-14 05:50:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:15,345 INFO L225 Difference]: With dead ends: 5110 [2022-12-14 05:50:15,345 INFO L226 Difference]: Without dead ends: 3116 [2022-12-14 05:50:15,362 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 [2022-12-14 05:50:15,363 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 683 mSDsluCounter, 2676 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 3445 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:15,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 3445 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:50:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-12-14 05:50:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2937. [2022-12-14 05:50:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2937 states, 2049 states have (on average 1.5788189360663738) internal successors, (3235), 2178 states have internal predecessors, (3235), 702 states have call successors, (702), 183 states have call predecessors, (702), 185 states have return successors, (807), 644 states have call predecessors, (807), 697 states have call successors, (807) [2022-12-14 05:50:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 4744 transitions. [2022-12-14 05:50:15,497 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 4744 transitions. Word has length 94 [2022-12-14 05:50:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:15,497 INFO L495 AbstractCegarLoop]: Abstraction has 2937 states and 4744 transitions. [2022-12-14 05:50:15,497 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) [2022-12-14 05:50:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 4744 transitions. [2022-12-14 05:50:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 05:50:15,501 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:15,501 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] [2022-12-14 05:50:15,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 05:50:15,501 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:15,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:15,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1269764300, now seen corresponding path program 1 times [2022-12-14 05:50:15,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:15,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914995395] [2022-12-14 05:50:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:15,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 05:50:15,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914995395] [2022-12-14 05:50:15,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914995395] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:15,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833840010] [2022-12-14 05:50:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:15,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:15,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:15,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:15,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:50:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:50:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:50:16,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:16,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833840010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:16,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:16,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 05:50:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460520099] [2022-12-14 05:50:16,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:16,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:50:16,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:16,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:50:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:50:16,086 INFO L87 Difference]: Start difference. First operand 2937 states and 4744 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2022-12-14 05:50:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:16,907 INFO L93 Difference]: Finished difference Result 8019 states and 13256 transitions. [2022-12-14 05:50:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:50:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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 94 [2022-12-14 05:50:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:16,928 INFO L225 Difference]: With dead ends: 8019 [2022-12-14 05:50:16,929 INFO L226 Difference]: Without dead ends: 5094 [2022-12-14 05:50:16,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:50:16,941 INFO L413 NwaCegarLoop]: 713 mSDtfsCounter, 546 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:16,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 2907 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:50:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2022-12-14 05:50:17,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 5058. [2022-12-14 05:50:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5058 states, 3518 states have (on average 1.5144968732234223) internal successors, (5328), 3755 states have internal predecessors, (5328), 1201 states have call successors, (1201), 333 states have call predecessors, (1201), 338 states have return successors, (1549), 1082 states have call predecessors, (1549), 1193 states have call successors, (1549) [2022-12-14 05:50:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5058 states to 5058 states and 8078 transitions. [2022-12-14 05:50:17,136 INFO L78 Accepts]: Start accepts. Automaton has 5058 states and 8078 transitions. Word has length 94 [2022-12-14 05:50:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:17,136 INFO L495 AbstractCegarLoop]: Abstraction has 5058 states and 8078 transitions. [2022-12-14 05:50:17,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 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) [2022-12-14 05:50:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 5058 states and 8078 transitions. [2022-12-14 05:50:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 05:50:17,138 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:17,138 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] [2022-12-14 05:50:17,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:50:17,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:17,339 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash -144306736, now seen corresponding path program 1 times [2022-12-14 05:50:17,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370867785] [2022-12-14 05:50:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:17,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 05:50:17,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:17,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370867785] [2022-12-14 05:50:17,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370867785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:17,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24001007] [2022-12-14 05:50:17,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:17,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:17,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:17,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:17,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:50:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:17,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:50:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 05:50:17,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:17,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24001007] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:17,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:17,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:50:17,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623089520] [2022-12-14 05:50:17,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:17,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:50:17,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:17,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:50:17,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:17,879 INFO L87 Difference]: Start difference. First operand 5058 states and 8078 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-12-14 05:50:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:18,245 INFO L93 Difference]: Finished difference Result 11197 states and 18036 transitions. [2022-12-14 05:50:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:50:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 93 [2022-12-14 05:50:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:18,273 INFO L225 Difference]: With dead ends: 11197 [2022-12-14 05:50:18,273 INFO L226 Difference]: Without dead ends: 6151 [2022-12-14 05:50:18,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:18,295 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 571 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:18,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1307 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2022-12-14 05:50:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 4957. [2022-12-14 05:50:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 3449 states have (on average 1.5131922296317772) internal successors, (5219), 3684 states have internal predecessors, (5219), 1181 states have call successors, (1181), 327 states have call predecessors, (1181), 326 states have return successors, (1461), 1058 states have call predecessors, (1461), 1173 states have call successors, (1461) [2022-12-14 05:50:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 7861 transitions. [2022-12-14 05:50:18,572 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 7861 transitions. Word has length 93 [2022-12-14 05:50:18,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:18,573 INFO L495 AbstractCegarLoop]: Abstraction has 4957 states and 7861 transitions. [2022-12-14 05:50:18,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2022-12-14 05:50:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 7861 transitions. [2022-12-14 05:50:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 05:50:18,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:18,577 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] [2022-12-14 05:50:18,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:50:18,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 05:50:18,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash 148623465, now seen corresponding path program 1 times [2022-12-14 05:50:18,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:18,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119207852] [2022-12-14 05:50:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:18,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:50:19,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:19,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119207852] [2022-12-14 05:50:19,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119207852] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:19,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573316649] [2022-12-14 05:50:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:19,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:19,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:19,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:19,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:50:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:50:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:50:19,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:19,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573316649] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:19,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:50:19,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-12-14 05:50:19,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727306262] [2022-12-14 05:50:19,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:19,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:50:19,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:50:19,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:50:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:50:19,618 INFO L87 Difference]: Start difference. First operand 4957 states and 7861 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 05:50:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:20,039 INFO L93 Difference]: Finished difference Result 11022 states and 17533 transitions. [2022-12-14 05:50:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:50:20,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-12-14 05:50:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:20,066 INFO L225 Difference]: With dead ends: 11022 [2022-12-14 05:50:20,066 INFO L226 Difference]: Without dead ends: 6077 [2022-12-14 05:50:20,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:50:20,089 INFO L413 NwaCegarLoop]: 741 mSDtfsCounter, 432 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:20,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 1857 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:50:20,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2022-12-14 05:50:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 5883. [2022-12-14 05:50:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5883 states, 4066 states have (on average 1.4746679783571077) internal successors, (5996), 4295 states have internal predecessors, (5996), 1364 states have call successors, (1364), 432 states have call predecessors, (1364), 452 states have return successors, (1751), 1261 states have call predecessors, (1751), 1353 states have call successors, (1751) [2022-12-14 05:50:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5883 states to 5883 states and 9111 transitions. [2022-12-14 05:50:20,346 INFO L78 Accepts]: Start accepts. Automaton has 5883 states and 9111 transitions. Word has length 99 [2022-12-14 05:50:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:20,346 INFO L495 AbstractCegarLoop]: Abstraction has 5883 states and 9111 transitions. [2022-12-14 05:50:20,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 05:50:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 5883 states and 9111 transitions. [2022-12-14 05:50:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 05:50:20,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:20,348 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] [2022-12-14 05:50:20,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 05:50:20,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 05:50:20,549 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:50:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:20,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1927929146, now seen corresponding path program 1 times [2022-12-14 05:50:20,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:50:20,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127129517] [2022-12-14 05:50:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:20,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:50:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:50:20,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:50:20,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127129517] [2022-12-14 05:50:20,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127129517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:50:20,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103820077] [2022-12-14 05:50:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:20,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:20,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:20,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:20,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:50:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:21,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:50:21,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 05:50:21,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:50:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:50:21,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103820077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:50:21,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103525263] [2022-12-14 05:50:21,761 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-12-14 05:50:21,761 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:50:21,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:50:21,769 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:50:21,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:50:26,642 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-12-14 05:50:34,235 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2022-12-14 05:50:34,591 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 05:50:36,736 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 05:50:36,942 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-12-14 05:50:37,016 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-12-14 05:50:37,091 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 05:50:40,527 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 05:50:41,101 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 05:50:41,256 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:51:45,262 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 511 DAG size of output: 450 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:51:51,200 WARN L233 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 547 DAG size of output: 458 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:52:06,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [103525263] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:52:06,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:52:06,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2022-12-14 05:52:06,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163032349] [2022-12-14 05:52:06,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:52:06,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 05:52:06,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:52:06,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 05:52:06,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 05:52:06,555 INFO L87 Difference]: Start difference. First operand 5883 states and 9111 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) [2022-12-14 05:52:27,755 WARN L233 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 607 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:52:34,092 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 613 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:52:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:52:56,858 INFO L93 Difference]: Finished difference Result 11899 states and 18432 transitions. [2022-12-14 05:52:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 05:52:56,859 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 [2022-12-14 05:52:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:52:56,879 INFO L225 Difference]: With dead ends: 11899 [2022-12-14 05:52:56,880 INFO L226 Difference]: Without dead ends: 6028 [2022-12-14 05:52:56,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 111.4s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 05:52:56,899 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 155 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 6166 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 6207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 6166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:52:56,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 3583 Invalid, 6207 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [41 Valid, 6166 Invalid, 0 Unknown, 0 Unchecked, 23.9s Time] [2022-12-14 05:52:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2022-12-14 05:52:57,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 5949. [2022-12-14 05:52:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 4112 states have (on average 1.4708171206225682) internal successors, (6048), 4340 states have internal predecessors, (6048), 1377 states have call successors, (1377), 441 states have call predecessors, (1377), 459 states have return successors, (1765), 1273 states have call predecessors, (1765), 1366 states have call successors, (1765) [2022-12-14 05:52:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 9190 transitions. [2022-12-14 05:52:57,316 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 9190 transitions. Word has length 100 [2022-12-14 05:52:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:52:57,316 INFO L495 AbstractCegarLoop]: Abstraction has 5949 states and 9190 transitions. [2022-12-14 05:52:57,317 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) [2022-12-14 05:52:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 9190 transitions. [2022-12-14 05:52:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 05:52:57,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:52:57,319 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] [2022-12-14 05:52:57,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:52:57,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:52:57,519 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:52:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:52:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash 4677521, now seen corresponding path program 1 times [2022-12-14 05:52:57,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:52:57,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473893680] [2022-12-14 05:52:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:52:57,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:52:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:52:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 05:52:57,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:52:57,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473893680] [2022-12-14 05:52:57,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473893680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:52:57,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683810378] [2022-12-14 05:52:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:52:57,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:52:57,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:52:57,738 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:52:57,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:52:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:52:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:52:57,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:52:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 05:52:58,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:52:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 05:52:58,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683810378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:52:58,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207899204] [2022-12-14 05:52:58,367 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2022-12-14 05:52:58,367 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:52:58,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:52:58,367 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:52:58,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:53:02,119 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-12-14 05:53:10,942 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2022-12-14 05:53:10,952 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 05:53:13,154 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 05:53:13,349 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-12-14 05:53:13,423 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-12-14 05:53:13,497 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 05:53:16,908 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 05:53:17,487 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 05:53:17,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:54:33,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [207899204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:54:33,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:54:33,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2022-12-14 05:54:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584090344] [2022-12-14 05:54:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:54:33,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 05:54:33,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:54:33,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 05:54:33,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 05:54:33,698 INFO L87 Difference]: Start difference. First operand 5949 states and 9190 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) [2022-12-14 05:55:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:55:26,663 INFO L93 Difference]: Finished difference Result 11877 states and 18393 transitions. [2022-12-14 05:55:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 05:55:26,664 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 [2022-12-14 05:55:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:55:26,682 INFO L225 Difference]: With dead ends: 11877 [2022-12-14 05:55:26,682 INFO L226 Difference]: Without dead ends: 6018 [2022-12-14 05:55:26,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 270 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 95.1s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 05:55:26,696 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 146 mSDsluCounter, 4270 mSDsCounter, 0 mSdLazyCounter, 8402 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 4866 SdHoareTripleChecker+Invalid, 8433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 8402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:55:26,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 4866 Invalid, 8433 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 8402 Invalid, 0 Unknown, 0 Unchecked, 33.5s Time] [2022-12-14 05:55:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2022-12-14 05:55:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 5951. [2022-12-14 05:55:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5951 states, 4113 states have (on average 1.4704595185995624) internal successors, (6048), 4341 states have internal predecessors, (6048), 1377 states have call successors, (1377), 442 states have call predecessors, (1377), 460 states have return successors, (1765), 1273 states have call predecessors, (1765), 1366 states have call successors, (1765) [2022-12-14 05:55:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5951 states to 5951 states and 9190 transitions. [2022-12-14 05:55:27,027 INFO L78 Accepts]: Start accepts. Automaton has 5951 states and 9190 transitions. Word has length 106 [2022-12-14 05:55:27,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:55:27,028 INFO L495 AbstractCegarLoop]: Abstraction has 5951 states and 9190 transitions. [2022-12-14 05:55:27,028 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) [2022-12-14 05:55:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5951 states and 9190 transitions. [2022-12-14 05:55:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 05:55:27,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:55:27,030 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] [2022-12-14 05:55:27,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:55:27,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:55:27,230 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:55:27,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:55:27,231 INFO L85 PathProgramCache]: Analyzing trace with hash -402829550, now seen corresponding path program 1 times [2022-12-14 05:55:27,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:55:27,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143053437] [2022-12-14 05:55:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:55:27,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:55:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:55:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 05:55:27,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:55:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143053437] [2022-12-14 05:55:27,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143053437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:55:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959426948] [2022-12-14 05:55:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:55:27,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:55:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:55:27,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:55:27,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:55:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:55:27,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:55:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:55:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 05:55:27,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:55:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 05:55:28,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959426948] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:55:28,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [526309517] [2022-12-14 05:55:28,013 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2022-12-14 05:55:28,014 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:55:28,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:55:28,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:55:28,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:55:31,625 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2022-12-14 05:55:42,203 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2022-12-14 05:55:42,405 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 05:55:44,479 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 05:55:44,676 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2022-12-14 05:55:44,749 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2022-12-14 05:55:44,823 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 05:55:48,266 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 05:55:48,827 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 05:55:48,971 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:57:18,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [526309517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:57:18,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:57:18,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2022-12-14 05:57:18,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732822421] [2022-12-14 05:57:18,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:57:18,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 05:57:18,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:57:18,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 05:57:18,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 05:57:18,734 INFO L87 Difference]: Start difference. First operand 5951 states and 9190 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) [2022-12-14 05:57:45,382 WARN L233 SmtUtils]: Spent 5.43s 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) [2022-12-14 05:58:12,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:12,679 INFO L93 Difference]: Finished difference Result 11878 states and 18382 transitions. [2022-12-14 05:58:12,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 05:58:12,680 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 [2022-12-14 05:58:12,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:12,697 INFO L225 Difference]: With dead ends: 11878 [2022-12-14 05:58:12,697 INFO L226 Difference]: Without dead ends: 6019 [2022-12-14 05:58:12,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 284 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 114.4s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 05:58:12,711 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 256 mSDsluCounter, 4253 mSDsCounter, 0 mSdLazyCounter, 7069 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 4735 SdHoareTripleChecker+Invalid, 7137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 7069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:12,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 4735 Invalid, 7137 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 7069 Invalid, 0 Unknown, 0 Unchecked, 28.8s Time] [2022-12-14 05:58:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6019 states. [2022-12-14 05:58:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6019 to 5952. [2022-12-14 05:58:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5952 states, 4114 states have (on average 1.470102090422946) internal successors, (6048), 4342 states have internal predecessors, (6048), 1376 states have call successors, (1376), 443 states have call predecessors, (1376), 461 states have return successors, (1755), 1272 states have call predecessors, (1755), 1365 states have call successors, (1755) [2022-12-14 05:58:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5952 states to 5952 states and 9179 transitions. [2022-12-14 05:58:13,038 INFO L78 Accepts]: Start accepts. Automaton has 5952 states and 9179 transitions. Word has length 112 [2022-12-14 05:58:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:13,039 INFO L495 AbstractCegarLoop]: Abstraction has 5952 states and 9179 transitions. [2022-12-14 05:58:13,039 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) [2022-12-14 05:58:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5952 states and 9179 transitions. [2022-12-14 05:58:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-14 05:58:13,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:13,044 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:58:13,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:58:13,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 05:58:13,245 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:58:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:13,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1937865180, now seen corresponding path program 1 times [2022-12-14 05:58:13,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:13,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114469745] [2022-12-14 05:58:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:13,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 05:58:13,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:13,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114469745] [2022-12-14 05:58:13,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114469745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:58:13,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291390306] [2022-12-14 05:58:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:13,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:58:13,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:58:13,487 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:58:13,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:58:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:58:13,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:58:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-12-14 05:58:13,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:58:13,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291390306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:13,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:58:13,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2022-12-14 05:58:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435752743] [2022-12-14 05:58:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 05:58:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 05:58:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-12-14 05:58:13,971 INFO L87 Difference]: Start difference. First operand 5952 states and 9179 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 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) [2022-12-14 05:58:17,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:17,147 INFO L93 Difference]: Finished difference Result 15129 states and 24041 transitions. [2022-12-14 05:58:17,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 05:58:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 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 182 [2022-12-14 05:58:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:17,180 INFO L225 Difference]: With dead ends: 15129 [2022-12-14 05:58:17,180 INFO L226 Difference]: Without dead ends: 9276 [2022-12-14 05:58:17,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 05:58:17,204 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 1627 mSDsluCounter, 2656 mSDsCounter, 0 mSdLazyCounter, 6542 mSolverCounterSat, 789 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 3238 SdHoareTripleChecker+Invalid, 7331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 6542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:17,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1646 Valid, 3238 Invalid, 7331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 6542 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 05:58:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9276 states. [2022-12-14 05:58:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9276 to 8265. [2022-12-14 05:58:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8265 states, 5694 states have (on average 1.4539866526167895) internal successors, (8279), 5968 states have internal predecessors, (8279), 1892 states have call successors, (1892), 679 states have call predecessors, (1892), 678 states have return successors, (2500), 1757 states have call predecessors, (2500), 1873 states have call successors, (2500) [2022-12-14 05:58:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 12671 transitions. [2022-12-14 05:58:17,959 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 12671 transitions. Word has length 182 [2022-12-14 05:58:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:17,960 INFO L495 AbstractCegarLoop]: Abstraction has 8265 states and 12671 transitions. [2022-12-14 05:58:17,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 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) [2022-12-14 05:58:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 12671 transitions. [2022-12-14 05:58:17,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-14 05:58:17,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:17,965 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] [2022-12-14 05:58:17,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:58:18,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 05:58:18,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:58:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash 412780800, now seen corresponding path program 1 times [2022-12-14 05:58:18,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:18,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908407752] [2022-12-14 05:58:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:18,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 05:58:18,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908407752] [2022-12-14 05:58:18,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908407752] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:58:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603673702] [2022-12-14 05:58:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:18,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:58:18,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:58:18,403 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:58:18,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:58:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:58:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:58:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 05:58:18,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:58:18,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603673702] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:58:18,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:58:18,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2022-12-14 05:58:18,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557406440] [2022-12-14 05:58:18,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:58:18,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:58:18,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:58:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:58:18,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:58:18,761 INFO L87 Difference]: Start difference. First operand 8265 states and 12671 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) [2022-12-14 05:58:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:58:19,588 INFO L93 Difference]: Finished difference Result 14815 states and 23249 transitions. [2022-12-14 05:58:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:58:19,589 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 [2022-12-14 05:58:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:58:19,618 INFO L225 Difference]: With dead ends: 14815 [2022-12-14 05:58:19,618 INFO L226 Difference]: Without dead ends: 8596 [2022-12-14 05:58:19,642 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 [2022-12-14 05:58:19,642 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 33 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:58:19,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1210 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:58:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8596 states. [2022-12-14 05:58:20,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8596 to 8349. [2022-12-14 05:58:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8349 states, 5766 states have (on average 1.450398890045092) internal successors, (8363), 6040 states have internal predecessors, (8363), 1904 states have call successors, (1904), 679 states have call predecessors, (1904), 678 states have return successors, (2512), 1769 states have call predecessors, (2512), 1885 states have call successors, (2512) [2022-12-14 05:58:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8349 states to 8349 states and 12779 transitions. [2022-12-14 05:58:20,351 INFO L78 Accepts]: Start accepts. Automaton has 8349 states and 12779 transitions. Word has length 183 [2022-12-14 05:58:20,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:58:20,352 INFO L495 AbstractCegarLoop]: Abstraction has 8349 states and 12779 transitions. [2022-12-14 05:58:20,352 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) [2022-12-14 05:58:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 8349 states and 12779 transitions. [2022-12-14 05:58:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 05:58:20,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:58:20,358 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] [2022-12-14 05:58:20,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 05:58:20,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:58:20,558 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:58:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:58:20,559 INFO L85 PathProgramCache]: Analyzing trace with hash -625253757, now seen corresponding path program 1 times [2022-12-14 05:58:20,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:58:20,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892620175] [2022-12-14 05:58:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:20,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:58:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 05:58:20,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:58:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892620175] [2022-12-14 05:58:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892620175] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:58:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016258577] [2022-12-14 05:58:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:58:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:58:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:58:20,799 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:58:20,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:58:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:58:21,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:58:21,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:58:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:58:21,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:58:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 05:58:21,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016258577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:58:21,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1395422953] [2022-12-14 05:58:21,615 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2022-12-14 05:58:21,615 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:58:21,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:58:21,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:58:21,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:58:28,154 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2022-12-14 05:58:35,782 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 82 for LOIs [2022-12-14 05:58:36,478 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 79 for LOIs [2022-12-14 05:58:36,620 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 41 for LOIs [2022-12-14 05:58:36,644 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 43 for LOIs [2022-12-14 05:58:36,652 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2022-12-14 05:58:36,654 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 57 for LOIs [2022-12-14 05:58:36,667 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 05:58:38,744 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 05:58:38,937 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2022-12-14 05:58:38,938 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 51 for LOIs [2022-12-14 05:58:39,018 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 45 for LOIs [2022-12-14 05:58:39,021 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2022-12-14 05:58:39,028 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 05:58:42,568 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 05:58:43,131 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 05:58:43,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:59:43,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '237258#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 05:59:43,903 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:59:43,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:59:43,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 21 [2022-12-14 05:59:43,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070269945] [2022-12-14 05:59:43,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:59:43,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 05:59:43,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 05:59:43,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=823, Invalid=11387, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 05:59:43,910 INFO L87 Difference]: Start difference. First operand 8349 states and 12779 transitions. Second operand has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) [2022-12-14 05:59:51,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:51,124 INFO L93 Difference]: Finished difference Result 31123 states and 51443 transitions. [2022-12-14 05:59:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 05:59:51,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) Word has length 186 [2022-12-14 05:59:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:51,192 INFO L225 Difference]: With dead ends: 31123 [2022-12-14 05:59:51,192 INFO L226 Difference]: Without dead ends: 22862 [2022-12-14 05:59:51,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 456 SyntacticMatches, 9 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6402 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=1052, Invalid=15204, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 05:59:51,234 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 3612 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 12728 mSolverCounterSat, 2306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3720 SdHoareTripleChecker+Valid, 5250 SdHoareTripleChecker+Invalid, 15034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2306 IncrementalHoareTripleChecker+Valid, 12728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:51,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3720 Valid, 5250 Invalid, 15034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2306 Valid, 12728 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 05:59:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22862 states. [2022-12-14 05:59:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22862 to 19562. [2022-12-14 05:59:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19562 states, 13306 states have (on average 1.4456636104013227) internal successors, (19236), 14157 states have internal predecessors, (19236), 4764 states have call successors, (4764), 1453 states have call predecessors, (4764), 1491 states have return successors, (6688), 4395 states have call predecessors, (6688), 4739 states have call successors, (6688) [2022-12-14 05:59:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19562 states to 19562 states and 30688 transitions. [2022-12-14 05:59:52,440 INFO L78 Accepts]: Start accepts. Automaton has 19562 states and 30688 transitions. Word has length 186 [2022-12-14 05:59:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:52,441 INFO L495 AbstractCegarLoop]: Abstraction has 19562 states and 30688 transitions. [2022-12-14 05:59:52,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) [2022-12-14 05:59:52,441 INFO L276 IsEmpty]: Start isEmpty. Operand 19562 states and 30688 transitions. [2022-12-14 05:59:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-12-14 05:59:52,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:52,451 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:52,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 05:59:52,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:52,652 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:52,654 INFO L85 PathProgramCache]: Analyzing trace with hash 825761570, now seen corresponding path program 1 times [2022-12-14 05:59:52,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:52,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75983005] [2022-12-14 05:59:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:52,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 05:59:52,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:52,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75983005] [2022-12-14 05:59:52,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75983005] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:59:52,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982675618] [2022-12-14 05:59:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:52,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:52,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:52,866 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:59:52,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:59:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:53,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:59:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:59:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 05:59:53,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:59:53,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982675618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:59:53,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:59:53,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 05:59:53,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073664698] [2022-12-14 05:59:53,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:59:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:59:53,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:59:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:59:53,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:59:53,279 INFO L87 Difference]: Start difference. First operand 19562 states and 30688 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 05:59:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:59:55,045 INFO L93 Difference]: Finished difference Result 40479 states and 64626 transitions. [2022-12-14 05:59:55,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:59:55,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) Word has length 192 [2022-12-14 05:59:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:59:55,138 INFO L225 Difference]: With dead ends: 40479 [2022-12-14 05:59:55,138 INFO L226 Difference]: Without dead ends: 22951 [2022-12-14 05:59:55,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:59:55,214 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 117 mSDsluCounter, 2755 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 3495 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:59:55,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 3495 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:59:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22951 states. [2022-12-14 05:59:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22951 to 19816. [2022-12-14 05:59:56,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19816 states, 13502 states have (on average 1.4391941934528218) internal successors, (19432), 14365 states have internal predecessors, (19432), 4764 states have call successors, (4764), 1453 states have call predecessors, (4764), 1549 states have return successors, (6768), 4441 states have call predecessors, (6768), 4739 states have call successors, (6768) [2022-12-14 05:59:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19816 states to 19816 states and 30964 transitions. [2022-12-14 05:59:56,774 INFO L78 Accepts]: Start accepts. Automaton has 19816 states and 30964 transitions. Word has length 192 [2022-12-14 05:59:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:59:56,774 INFO L495 AbstractCegarLoop]: Abstraction has 19816 states and 30964 transitions. [2022-12-14 05:59:56,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2022-12-14 05:59:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 19816 states and 30964 transitions. [2022-12-14 05:59:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-12-14 05:59:56,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:59:56,784 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:59:56,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:59:56,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 05:59:56,986 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:59:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:59:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1665578303, now seen corresponding path program 1 times [2022-12-14 05:59:56,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:59:56,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420505255] [2022-12-14 05:59:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:56,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:59:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-12-14 05:59:57,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:59:57,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420505255] [2022-12-14 05:59:57,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420505255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:59:57,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251193577] [2022-12-14 05:59:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:59:57,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:59:57,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:59:57,660 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:59:57,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:59:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:59:57,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2529 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:59:57,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:59:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:59:58,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:59:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-12-14 05:59:58,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251193577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:59:58,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1396386799] [2022-12-14 05:59:58,521 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-12-14 05:59:58,521 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:59:58,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:59:58,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:59:58,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:00:04,326 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2022-12-14 06:00:11,319 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 82 for LOIs [2022-12-14 06:00:12,164 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2022-12-14 06:00:12,465 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 41 for LOIs [2022-12-14 06:00:12,488 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2022-12-14 06:00:12,490 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 62 for LOIs [2022-12-14 06:00:12,618 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 41 for LOIs [2022-12-14 06:00:12,627 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 53 for LOIs [2022-12-14 06:00:12,638 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 06:00:14,717 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 06:00:14,914 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2022-12-14 06:00:14,916 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 83 for LOIs [2022-12-14 06:00:15,069 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 76 for LOIs [2022-12-14 06:00:15,076 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2022-12-14 06:00:15,084 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 06:00:18,669 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 06:00:19,423 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 06:00:19,683 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:01:24,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '396686#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 06:01:24,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:01:24,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:01:24,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 10] total 24 [2022-12-14 06:01:24,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870774287] [2022-12-14 06:01:24,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:01:24,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 06:01:24,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:24,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 06:01:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=12807, Unknown=0, NotChecked=0, Total=13806 [2022-12-14 06:01:24,047 INFO L87 Difference]: Start difference. First operand 19816 states and 30964 transitions. Second operand has 24 states, 21 states have (on average 9.571428571428571) internal successors, (201), 22 states have internal predecessors, (201), 11 states have call successors, (77), 9 states have call predecessors, (77), 13 states have return successors, (78), 16 states have call predecessors, (78), 11 states have call successors, (78) [2022-12-14 06:01:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:36,448 INFO L93 Difference]: Finished difference Result 61388 states and 101292 transitions. [2022-12-14 06:01:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-14 06:01:36,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 9.571428571428571) internal successors, (201), 22 states have internal predecessors, (201), 11 states have call successors, (77), 9 states have call predecessors, (77), 13 states have return successors, (78), 16 states have call predecessors, (78), 11 states have call successors, (78) Word has length 195 [2022-12-14 06:01:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:36,650 INFO L225 Difference]: With dead ends: 61388 [2022-12-14 06:01:36,650 INFO L226 Difference]: Without dead ends: 42915 [2022-12-14 06:01:36,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 497 SyntacticMatches, 14 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16973 ImplicationChecksByTransitivity, 65.9s TimeCoverageRelationStatistics Valid=2553, Invalid=36059, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 06:01:36,756 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 10996 mSDsluCounter, 5564 mSDsCounter, 0 mSdLazyCounter, 15776 mSolverCounterSat, 7303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11094 SdHoareTripleChecker+Valid, 6268 SdHoareTripleChecker+Invalid, 23079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7303 IncrementalHoareTripleChecker+Valid, 15776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:36,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11094 Valid, 6268 Invalid, 23079 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7303 Valid, 15776 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-12-14 06:01:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42915 states. [2022-12-14 06:01:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42915 to 38874. [2022-12-14 06:01:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38874 states, 26540 states have (on average 1.4194046721929163) internal successors, (37671), 28180 states have internal predecessors, (37671), 9080 states have call successors, (9080), 2870 states have call predecessors, (9080), 3253 states have return successors, (15074), 8631 states have call predecessors, (15074), 9037 states have call successors, (15074) [2022-12-14 06:01:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38874 states to 38874 states and 61825 transitions. [2022-12-14 06:01:39,314 INFO L78 Accepts]: Start accepts. Automaton has 38874 states and 61825 transitions. Word has length 195 [2022-12-14 06:01:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:39,314 INFO L495 AbstractCegarLoop]: Abstraction has 38874 states and 61825 transitions. [2022-12-14 06:01:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 9.571428571428571) internal successors, (201), 22 states have internal predecessors, (201), 11 states have call successors, (77), 9 states have call predecessors, (77), 13 states have return successors, (78), 16 states have call predecessors, (78), 11 states have call successors, (78) [2022-12-14 06:01:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 38874 states and 61825 transitions. [2022-12-14 06:01:39,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-12-14 06:01:39,321 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:39,321 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:39,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 06:01:39,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:39,522 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:01:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:39,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1866176528, now seen corresponding path program 1 times [2022-12-14 06:01:39,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:39,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978547807] [2022-12-14 06:01:39,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-12-14 06:01:40,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:40,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978547807] [2022-12-14 06:01:40,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978547807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:01:40,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504557024] [2022-12-14 06:01:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:40,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:40,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:40,129 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:01:40,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f975802-3232-4a61-b6d9-9b8ddcb97c22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 06:01:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 06:01:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:01:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 06:01:40,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:01:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-14 06:01:41,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504557024] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:01:41,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499328132] [2022-12-14 06:01:41,144 INFO L159 IcfgInterpreter]: Started Sifa with 125 locations of interest [2022-12-14 06:01:41,144 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:01:41,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:01:41,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:01:41,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:01:47,413 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 685 for LOIs [2022-12-14 06:01:53,660 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 59 for LOIs [2022-12-14 06:01:55,298 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 53 for LOIs [2022-12-14 06:01:55,413 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 45 for LOIs [2022-12-14 06:01:55,437 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2022-12-14 06:01:55,439 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 45 for LOIs [2022-12-14 06:01:55,546 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 73 for LOIs [2022-12-14 06:01:55,565 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 55 for LOIs [2022-12-14 06:01:55,577 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2022-12-14 06:01:57,604 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2022-12-14 06:01:57,800 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2022-12-14 06:01:57,802 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 81 for LOIs [2022-12-14 06:01:57,940 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 49 for LOIs [2022-12-14 06:01:57,943 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 53 for LOIs [2022-12-14 06:01:57,946 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 54 for LOIs [2022-12-14 06:01:57,954 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2022-12-14 06:02:01,288 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 06:02:01,844 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 06:02:01,992 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:03:07,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '540239#(and (= ~executiveFloor~0 4) (= ~head~0.offset 0) (= ~currentHeading~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 06:03:07,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:03:07,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:03:07,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 30 [2022-12-14 06:03:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247118868] [2022-12-14 06:03:07,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:03:07,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 06:03:07,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:03:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 06:03:07,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=15974, Unknown=0, NotChecked=0, Total=17030 [2022-12-14 06:03:07,769 INFO L87 Difference]: Start difference. First operand 38874 states and 61825 transitions. Second operand has 30 states, 24 states have (on average 7.875) internal successors, (189), 25 states have internal predecessors, (189), 14 states have call successors, (72), 10 states have call predecessors, (72), 12 states have return successors, (72), 20 states have call predecessors, (72), 14 states have call successors, (72)