./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:09:13,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:09:13,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:09:13,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:09:13,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:09:13,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:09:13,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:09:13,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:09:13,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:09:13,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:09:13,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:09:13,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:09:13,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:09:13,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:09:13,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:09:13,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:09:13,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:09:13,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:09:13,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:09:13,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:09:13,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:09:13,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:09:13,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:09:13,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:09:13,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:09:13,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:09:13,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:09:13,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:09:13,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:09:13,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:09:13,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:09:13,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:09:13,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:09:13,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:09:13,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:09:13,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:09:13,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:09:13,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:09:13,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:09:13,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:09:13,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:09:13,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:09:13,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:09:13,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:09:13,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:09:13,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:09:13,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:09:13,416 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:09:13,416 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:09:13,416 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:09:13,416 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:09:13,417 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:09:13,418 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:09:13,418 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:09:13,418 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:09:13,418 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:09:13,418 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:09:13,419 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:09:13,419 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:09:13,419 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:09:13,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:09:13,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:09:13,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:09:13,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:09:13,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:09:13,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:09:13,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:09:13,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:09:13,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:09:13,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:09:13,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:09:13,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:09:13,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:09:13,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:09:13,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:09:13,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:09:13,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:09:13,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:09:13,426 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:09:13,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:09:13,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:09:13,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:09:13,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:09:13,427 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89950477a2818e2be847e3014c0e2f9e906834037b4e328723302699ed4d9564 [2021-11-25 20:09:13,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:09:13,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:09:13,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:09:13,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:09:13,723 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:09:13,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2021-11-25 20:09:13,785 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/data/aac4ec18f/fa656f17a6b144d7a34a27ee661b886c/FLAGca2fd1204 [2021-11-25 20:09:14,498 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:09:14,499 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c [2021-11-25 20:09:14,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/data/aac4ec18f/fa656f17a6b144d7a34a27ee661b886c/FLAGca2fd1204 [2021-11-25 20:09:14,690 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/data/aac4ec18f/fa656f17a6b144d7a34a27ee661b886c [2021-11-25 20:09:14,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:09:14,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:09:14,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:09:14,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:09:14,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:09:14,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:09:14" (1/1) ... [2021-11-25 20:09:14,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5e17e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:14, skipping insertion in model container [2021-11-25 20:09:14,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:09:14" (1/1) ... [2021-11-25 20:09:14,708 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:09:14,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:09:15,228 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2021-11-25 20:09:15,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:09:15,295 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:09:15,376 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/sv-benchmarks/c/product-lines/elevator_spec13_product24.cil.c[51490,51503] [2021-11-25 20:09:15,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:09:15,426 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:09:15,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15 WrapperNode [2021-11-25 20:09:15,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:09:15,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:09:15,428 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:09:15,428 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:09:15,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,516 INFO L137 Inliner]: procedures = 96, calls = 352, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 894 [2021-11-25 20:09:15,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:09:15,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:09:15,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:09:15,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:09:15,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:09:15,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:09:15,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:09:15,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:09:15,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (1/1) ... [2021-11-25 20:09:15,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:09:15,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:15,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:09:15,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:09:15,707 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-25 20:09:15,708 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-25 20:09:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:09:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 20:09:15,708 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 20:09:15,708 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-25 20:09:15,709 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-25 20:09:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:09:15,709 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:09:15,709 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-25 20:09:15,709 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-25 20:09:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:09:15,710 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:09:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 20:09:15,710 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 20:09:15,710 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:09:15,710 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:09:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 20:09:15,711 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 20:09:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:09:15,711 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:09:15,711 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:09:15,711 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:09:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:09:15,712 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:09:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 20:09:15,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 20:09:15,712 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:09:15,713 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:09:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:09:15,713 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:09:15,713 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:09:15,713 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:09:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:09:15,714 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:09:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:09:15,714 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:09:15,714 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:09:15,715 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:09:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:09:15,715 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:09:15,715 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:09:15,715 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:09:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:09:15,716 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:09:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:09:15,716 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:09:15,716 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:09:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:09:15,717 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:09:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:09:15,717 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:09:15,717 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:09:15,717 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:09:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:09:15,718 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-25 20:09:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:09:15,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:09:15,718 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:09:15,719 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:09:15,719 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-25 20:09:15,719 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-25 20:09:15,931 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:09:15,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:09:17,172 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:09:17,809 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:09:17,809 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 20:09:17,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:09:17 BoogieIcfgContainer [2021-11-25 20:09:17,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:09:17,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:09:17,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:09:17,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:09:17,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:09:14" (1/3) ... [2021-11-25 20:09:17,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3b914c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:09:17, skipping insertion in model container [2021-11-25 20:09:17,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:09:15" (2/3) ... [2021-11-25 20:09:17,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3b914c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:09:17, skipping insertion in model container [2021-11-25 20:09:17,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:09:17" (3/3) ... [2021-11-25 20:09:17,823 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product24.cil.c [2021-11-25 20:09:17,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:09:17,828 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:09:17,891 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:09:17,899 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:09:17,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:09:17,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 443 states, 302 states have (on average 1.576158940397351) internal successors, (476), 322 states have internal predecessors, (476), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-25 20:09:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:09:17,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:17,980 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 20:09:17,981 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:17,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:17,987 INFO L85 PathProgramCache]: Analyzing trace with hash -269389944, now seen corresponding path program 1 times [2021-11-25 20:09:17,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:17,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946323924] [2021-11-25 20:09:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:17,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:09:18,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:18,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946323924] [2021-11-25 20:09:18,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946323924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:18,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:18,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:09:18,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988127568] [2021-11-25 20:09:18,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:18,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:09:18,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:18,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:09:18,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:09:18,727 INFO L87 Difference]: Start difference. First operand has 443 states, 302 states have (on average 1.576158940397351) internal successors, (476), 322 states have internal predecessors, (476), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-25 20:09:21,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:21,906 INFO L93 Difference]: Finished difference Result 1834 states and 2976 transitions. [2021-11-25 20:09:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:09:21,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2021-11-25 20:09:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:21,943 INFO L225 Difference]: With dead ends: 1834 [2021-11-25 20:09:21,943 INFO L226 Difference]: Without dead ends: 1392 [2021-11-25 20:09:21,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:09:21,955 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 2025 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2106 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:21,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2106 Valid, 1874 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 20:09:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-11-25 20:09:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1279. [2021-11-25 20:09:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 916 states have (on average 1.5753275109170306) internal successors, (1443), 951 states have internal predecessors, (1443), 292 states have call successors, (292), 71 states have call predecessors, (292), 70 states have return successors, (310), 271 states have call predecessors, (310), 288 states have call successors, (310) [2021-11-25 20:09:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2045 transitions. [2021-11-25 20:09:22,169 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2045 transitions. Word has length 70 [2021-11-25 20:09:22,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:22,171 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 2045 transitions. [2021-11-25 20:09:22,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-25 20:09:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2045 transitions. [2021-11-25 20:09:22,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 20:09:22,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:22,185 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:22,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:09:22,186 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:22,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1775734748, now seen corresponding path program 1 times [2021-11-25 20:09:22,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:22,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616509623] [2021-11-25 20:09:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:22,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:09:22,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:22,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616509623] [2021-11-25 20:09:22,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616509623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:22,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:22,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:09:22,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339352522] [2021-11-25 20:09:22,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:22,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:09:22,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:09:22,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:09:22,455 INFO L87 Difference]: Start difference. First operand 1279 states and 2045 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:09:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:22,744 INFO L93 Difference]: Finished difference Result 3187 states and 5085 transitions. [2021-11-25 20:09:22,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:09:22,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 101 [2021-11-25 20:09:22,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:22,766 INFO L225 Difference]: With dead ends: 3187 [2021-11-25 20:09:22,766 INFO L226 Difference]: Without dead ends: 1923 [2021-11-25 20:09:22,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:09:22,778 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 520 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:22,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 2050 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:09:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-11-25 20:09:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1903. [2021-11-25 20:09:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1903 states, 1363 states have (on average 1.5414526779163609) internal successors, (2101), 1399 states have internal predecessors, (2101), 426 states have call successors, (426), 109 states have call predecessors, (426), 113 states have return successors, (487), 407 states have call predecessors, (487), 420 states have call successors, (487) [2021-11-25 20:09:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 3014 transitions. [2021-11-25 20:09:22,929 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 3014 transitions. Word has length 101 [2021-11-25 20:09:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:22,929 INFO L470 AbstractCegarLoop]: Abstraction has 1903 states and 3014 transitions. [2021-11-25 20:09:22,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:09:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 3014 transitions. [2021-11-25 20:09:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-25 20:09:22,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:22,935 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:22,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:09:22,935 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1010596704, now seen corresponding path program 1 times [2021-11-25 20:09:22,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:22,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040255762] [2021-11-25 20:09:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:22,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:09:23,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:23,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040255762] [2021-11-25 20:09:23,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040255762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:23,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:09:23,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:09:23,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933371478] [2021-11-25 20:09:23,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:23,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:09:23,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:09:23,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:09:23,080 INFO L87 Difference]: Start difference. First operand 1903 states and 3014 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-25 20:09:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:25,690 INFO L93 Difference]: Finished difference Result 5618 states and 8973 transitions. [2021-11-25 20:09:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:09:25,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 102 [2021-11-25 20:09:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:25,731 INFO L225 Difference]: With dead ends: 5618 [2021-11-25 20:09:25,731 INFO L226 Difference]: Without dead ends: 3732 [2021-11-25 20:09:25,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:09:25,750 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1308 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 3543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:25,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 2018 Invalid, 3543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 20:09:25,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2021-11-25 20:09:25,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3284. [2021-11-25 20:09:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2356 states have (on average 1.5509337860780985) internal successors, (3654), 2422 states have internal predecessors, (3654), 726 states have call successors, (726), 190 states have call predecessors, (726), 201 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2021-11-25 20:09:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 5218 transitions. [2021-11-25 20:09:26,023 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 5218 transitions. Word has length 102 [2021-11-25 20:09:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:26,024 INFO L470 AbstractCegarLoop]: Abstraction has 3284 states and 5218 transitions. [2021-11-25 20:09:26,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-25 20:09:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 5218 transitions. [2021-11-25 20:09:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-25 20:09:26,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:26,029 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:26,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:09:26,029 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash 370777201, now seen corresponding path program 1 times [2021-11-25 20:09:26,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:26,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089568995] [2021-11-25 20:09:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:26,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:09:26,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:26,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089568995] [2021-11-25 20:09:26,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089568995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:26,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102539206] [2021-11-25 20:09:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:26,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:26,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:26,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:26,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:09:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:26,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:09:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:09:26,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:26,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102539206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:26,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:26,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-25 20:09:26,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178484822] [2021-11-25 20:09:26,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:26,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:09:26,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:26,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:09:26,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:09:26,792 INFO L87 Difference]: Start difference. First operand 3284 states and 5218 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:09:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:27,113 INFO L93 Difference]: Finished difference Result 6607 states and 10671 transitions. [2021-11-25 20:09:27,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:09:27,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 106 [2021-11-25 20:09:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:27,144 INFO L225 Difference]: With dead ends: 6607 [2021-11-25 20:09:27,144 INFO L226 Difference]: Without dead ends: 3338 [2021-11-25 20:09:27,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:09:27,174 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 85 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:27,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1821 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:09:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-11-25 20:09:27,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3338. [2021-11-25 20:09:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 2401 states have (on average 1.544356518117451) internal successors, (3708), 2467 states have internal predecessors, (3708), 726 states have call successors, (726), 199 states have call predecessors, (726), 210 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2021-11-25 20:09:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 5272 transitions. [2021-11-25 20:09:27,499 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 5272 transitions. Word has length 106 [2021-11-25 20:09:27,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:27,502 INFO L470 AbstractCegarLoop]: Abstraction has 3338 states and 5272 transitions. [2021-11-25 20:09:27,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:09:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 5272 transitions. [2021-11-25 20:09:27,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 20:09:27,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:27,507 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:27,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:27,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:27,721 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash 388528680, now seen corresponding path program 1 times [2021-11-25 20:09:27,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:27,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535809754] [2021-11-25 20:09:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:27,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:09:27,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:27,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535809754] [2021-11-25 20:09:27,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535809754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:27,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950424181] [2021-11-25 20:09:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:27,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:27,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:27,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:27,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:09:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:28,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:09:28,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 20:09:28,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:28,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950424181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:28,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:28,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 20:09:28,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109051245] [2021-11-25 20:09:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:28,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:09:28,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:09:28,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:09:28,485 INFO L87 Difference]: Start difference. First operand 3338 states and 5272 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:09:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:28,802 INFO L93 Difference]: Finished difference Result 6688 states and 10690 transitions. [2021-11-25 20:09:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:09:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 108 [2021-11-25 20:09:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:28,834 INFO L225 Difference]: With dead ends: 6688 [2021-11-25 20:09:28,835 INFO L226 Difference]: Without dead ends: 3329 [2021-11-25 20:09:28,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:09:28,866 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 91 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:28,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1817 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:09:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2021-11-25 20:09:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 3329. [2021-11-25 20:09:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3329 states, 2392 states have (on average 1.5351170568561874) internal successors, (3672), 2458 states have internal predecessors, (3672), 726 states have call successors, (726), 199 states have call predecessors, (726), 210 states have return successors, (838), 695 states have call predecessors, (838), 718 states have call successors, (838) [2021-11-25 20:09:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 5236 transitions. [2021-11-25 20:09:29,142 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 5236 transitions. Word has length 108 [2021-11-25 20:09:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:29,143 INFO L470 AbstractCegarLoop]: Abstraction has 3329 states and 5236 transitions. [2021-11-25 20:09:29,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:09:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 5236 transitions. [2021-11-25 20:09:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 20:09:29,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:29,148 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:29,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:29,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:29,373 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1365136672, now seen corresponding path program 1 times [2021-11-25 20:09:29,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:29,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098433748] [2021-11-25 20:09:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:29,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 20:09:29,491 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:29,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098433748] [2021-11-25 20:09:29,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098433748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:29,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702656682] [2021-11-25 20:09:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:29,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:29,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:29,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:29,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:09:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:29,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:09:29,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:09:30,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:30,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702656682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:30,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:30,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 20:09:30,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249969685] [2021-11-25 20:09:30,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:30,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:09:30,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:09:30,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:09:30,081 INFO L87 Difference]: Start difference. First operand 3329 states and 5236 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:31,222 INFO L93 Difference]: Finished difference Result 8508 states and 13836 transitions. [2021-11-25 20:09:31,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:09:31,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 109 [2021-11-25 20:09:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:31,274 INFO L225 Difference]: With dead ends: 8508 [2021-11-25 20:09:31,274 INFO L226 Difference]: Without dead ends: 5194 [2021-11-25 20:09:31,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:09:31,314 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 662 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:31,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 2168 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:09:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-11-25 20:09:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 5124. [2021-11-25 20:09:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 3687 states have (on average 1.4890154597233523) internal successors, (5490), 3781 states have internal predecessors, (5490), 1103 states have call successors, (1103), 316 states have call predecessors, (1103), 333 states have return successors, (1471), 1062 states have call predecessors, (1471), 1091 states have call successors, (1471) [2021-11-25 20:09:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 8064 transitions. [2021-11-25 20:09:31,712 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 8064 transitions. Word has length 109 [2021-11-25 20:09:31,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:31,713 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 8064 transitions. [2021-11-25 20:09:31,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 8064 transitions. [2021-11-25 20:09:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 20:09:31,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:31,722 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:31,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:31,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:31,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash 409049355, now seen corresponding path program 1 times [2021-11-25 20:09:31,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:31,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309538622] [2021-11-25 20:09:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:31,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:09:32,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:32,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309538622] [2021-11-25 20:09:32,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309538622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:32,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034256675] [2021-11-25 20:09:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:32,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:32,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:32,045 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:32,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:09:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:32,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:09:32,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:09:32,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034256675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:32,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:32,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 20:09:32,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355073847] [2021-11-25 20:09:32,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:32,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:09:32,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:09:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:09:32,607 INFO L87 Difference]: Start difference. First operand 5124 states and 8064 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:09:32,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:32,982 INFO L93 Difference]: Finished difference Result 10449 states and 16982 transitions. [2021-11-25 20:09:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:09:32,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 110 [2021-11-25 20:09:32,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:33,043 INFO L225 Difference]: With dead ends: 10449 [2021-11-25 20:09:33,043 INFO L226 Difference]: Without dead ends: 5340 [2021-11-25 20:09:33,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:09:33,071 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 2 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:33,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2585 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:09:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2021-11-25 20:09:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 5234. [2021-11-25 20:09:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 3782 states have (on average 1.4767318878900053) internal successors, (5585), 3851 states have internal predecessors, (5585), 1103 states have call successors, (1103), 316 states have call predecessors, (1103), 348 states have return successors, (1542), 1102 states have call predecessors, (1542), 1091 states have call successors, (1542) [2021-11-25 20:09:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 8230 transitions. [2021-11-25 20:09:33,429 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 8230 transitions. Word has length 110 [2021-11-25 20:09:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:33,430 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 8230 transitions. [2021-11-25 20:09:33,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:09:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 8230 transitions. [2021-11-25 20:09:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 20:09:33,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:33,435 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:33,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:33,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:33,653 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash -406614207, now seen corresponding path program 1 times [2021-11-25 20:09:33,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:33,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635970986] [2021-11-25 20:09:33,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:33,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:09:33,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635970986] [2021-11-25 20:09:33,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635970986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018686394] [2021-11-25 20:09:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:33,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:33,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:33,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:33,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:09:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:34,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:09:34,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 20:09:34,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:34,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018686394] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:34,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:34,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-25 20:09:34,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652153682] [2021-11-25 20:09:34,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:34,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:09:34,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:09:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:09:34,446 INFO L87 Difference]: Start difference. First operand 5234 states and 8230 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:35,473 INFO L93 Difference]: Finished difference Result 11731 states and 18766 transitions. [2021-11-25 20:09:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:09:35,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2021-11-25 20:09:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:35,517 INFO L225 Difference]: With dead ends: 11731 [2021-11-25 20:09:35,517 INFO L226 Difference]: Without dead ends: 6512 [2021-11-25 20:09:35,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:09:35,543 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 784 mSDsluCounter, 3115 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 3860 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:35,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 3860 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:09:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2021-11-25 20:09:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 6384. [2021-11-25 20:09:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 4663 states have (on average 1.4623632854385589) internal successors, (6819), 4754 states have internal predecessors, (6819), 1244 states have call successors, (1244), 417 states have call predecessors, (1244), 476 states have return successors, (2182), 1248 states have call predecessors, (2182), 1224 states have call successors, (2182) [2021-11-25 20:09:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 10245 transitions. [2021-11-25 20:09:36,015 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 10245 transitions. Word has length 110 [2021-11-25 20:09:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:36,015 INFO L470 AbstractCegarLoop]: Abstraction has 6384 states and 10245 transitions. [2021-11-25 20:09:36,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 10245 transitions. [2021-11-25 20:09:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-25 20:09:36,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:36,021 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:36,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:36,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:36,237 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash -588387793, now seen corresponding path program 1 times [2021-11-25 20:09:36,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:36,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727412896] [2021-11-25 20:09:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:36,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:09:36,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727412896] [2021-11-25 20:09:36,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727412896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629970303] [2021-11-25 20:09:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:36,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:36,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:36,348 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:36,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:09:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:36,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:09:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:09:36,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:36,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629970303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:36,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:36,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 20:09:36,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318707400] [2021-11-25 20:09:36,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:36,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:09:36,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:09:36,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:09:36,829 INFO L87 Difference]: Start difference. First operand 6384 states and 10245 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-25 20:09:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:37,499 INFO L93 Difference]: Finished difference Result 13081 states and 21609 transitions. [2021-11-25 20:09:37,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:09:37,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 112 [2021-11-25 20:09:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:37,542 INFO L225 Difference]: With dead ends: 13081 [2021-11-25 20:09:37,542 INFO L226 Difference]: Without dead ends: 6721 [2021-11-25 20:09:37,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:09:37,597 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 19 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:37,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1777 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:09:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-11-25 20:09:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 6643. [2021-11-25 20:09:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 4922 states have (on average 1.4713531084924827) internal successors, (7242), 5013 states have internal predecessors, (7242), 1244 states have call successors, (1244), 417 states have call predecessors, (1244), 476 states have return successors, (2182), 1248 states have call predecessors, (2182), 1224 states have call successors, (2182) [2021-11-25 20:09:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 10668 transitions. [2021-11-25 20:09:38,031 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 10668 transitions. Word has length 112 [2021-11-25 20:09:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:38,032 INFO L470 AbstractCegarLoop]: Abstraction has 6643 states and 10668 transitions. [2021-11-25 20:09:38,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-25 20:09:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 10668 transitions. [2021-11-25 20:09:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 20:09:38,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:38,038 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:38,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:38,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 20:09:38,265 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:38,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash 641849861, now seen corresponding path program 1 times [2021-11-25 20:09:38,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:38,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46834335] [2021-11-25 20:09:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:38,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:09:38,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:38,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46834335] [2021-11-25 20:09:38,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46834335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:38,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589482949] [2021-11-25 20:09:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:38,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:38,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:38,385 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:38,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:09:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:09:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:09:38,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:38,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589482949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:38,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:38,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 20:09:38,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194998608] [2021-11-25 20:09:38,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:38,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:09:38,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:09:38,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:09:38,926 INFO L87 Difference]: Start difference. First operand 6643 states and 10668 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:40,351 INFO L93 Difference]: Finished difference Result 16700 states and 28678 transitions. [2021-11-25 20:09:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:09:40,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 114 [2021-11-25 20:09:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:40,412 INFO L225 Difference]: With dead ends: 16700 [2021-11-25 20:09:40,412 INFO L226 Difference]: Without dead ends: 11368 [2021-11-25 20:09:40,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:09:40,463 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 674 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 2216 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:40,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 2216 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:09:40,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11368 states. [2021-11-25 20:09:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11368 to 11132. [2021-11-25 20:09:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11132 states, 8262 states have (on average 1.4663519728879206) internal successors, (12115), 8409 states have internal predecessors, (12115), 2071 states have call successors, (2071), 703 states have call predecessors, (2071), 798 states have return successors, (4480), 2079 states have call predecessors, (4480), 2038 states have call successors, (4480) [2021-11-25 20:09:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 18666 transitions. [2021-11-25 20:09:41,288 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 18666 transitions. Word has length 114 [2021-11-25 20:09:41,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:41,291 INFO L470 AbstractCegarLoop]: Abstraction has 11132 states and 18666 transitions. [2021-11-25 20:09:41,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:41,291 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 18666 transitions. [2021-11-25 20:09:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-25 20:09:41,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:41,298 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:41,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 20:09:41,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:09:41,513 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:41,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:41,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1623455249, now seen corresponding path program 1 times [2021-11-25 20:09:41,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:41,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731693444] [2021-11-25 20:09:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:41,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:09:41,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731693444] [2021-11-25 20:09:41,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731693444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254212464] [2021-11-25 20:09:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:41,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:41,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:41,629 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:41,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:09:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:41,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:09:41,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:09:42,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:42,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254212464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:42,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:42,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-25 20:09:42,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398557827] [2021-11-25 20:09:42,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:42,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:09:42,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:09:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:09:42,098 INFO L87 Difference]: Start difference. First operand 11132 states and 18666 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-25 20:09:42,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:42,945 INFO L93 Difference]: Finished difference Result 22544 states and 39469 transitions. [2021-11-25 20:09:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:09:42,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 114 [2021-11-25 20:09:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:43,026 INFO L225 Difference]: With dead ends: 22544 [2021-11-25 20:09:43,026 INFO L226 Difference]: Without dead ends: 11436 [2021-11-25 20:09:43,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:09:43,127 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 4 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:43,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1903 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:09:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11436 states. [2021-11-25 20:09:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11436 to 11178. [2021-11-25 20:09:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11178 states, 8308 states have (on average 1.4534183919114108) internal successors, (12075), 8455 states have internal predecessors, (12075), 2071 states have call successors, (2071), 703 states have call predecessors, (2071), 798 states have return successors, (4480), 2079 states have call predecessors, (4480), 2038 states have call successors, (4480) [2021-11-25 20:09:43,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11178 states to 11178 states and 18626 transitions. [2021-11-25 20:09:43,994 INFO L78 Accepts]: Start accepts. Automaton has 11178 states and 18626 transitions. Word has length 114 [2021-11-25 20:09:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:43,994 INFO L470 AbstractCegarLoop]: Abstraction has 11178 states and 18626 transitions. [2021-11-25 20:09:43,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-11-25 20:09:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 11178 states and 18626 transitions. [2021-11-25 20:09:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-25 20:09:44,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:44,002 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:44,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:44,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 20:09:44,219 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:44,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1865720142, now seen corresponding path program 1 times [2021-11-25 20:09:44,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:44,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650480481] [2021-11-25 20:09:44,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:44,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:09:44,380 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:44,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650480481] [2021-11-25 20:09:44,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650480481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:44,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931612508] [2021-11-25 20:09:44,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:44,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:44,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:44,385 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:44,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:09:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:44,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:09:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:09:44,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:44,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931612508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:44,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:44,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 20:09:44,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200750707] [2021-11-25 20:09:44,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:44,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:09:44,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:44,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:09:44,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:09:44,890 INFO L87 Difference]: Start difference. First operand 11178 states and 18626 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:46,466 INFO L93 Difference]: Finished difference Result 25707 states and 45200 transitions. [2021-11-25 20:09:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:09:46,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 115 [2021-11-25 20:09:46,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:46,563 INFO L225 Difference]: With dead ends: 25707 [2021-11-25 20:09:46,563 INFO L226 Difference]: Without dead ends: 15867 [2021-11-25 20:09:46,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:09:46,661 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 674 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:46,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 2465 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:09:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15867 states. [2021-11-25 20:09:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15867 to 15657. [2021-11-25 20:09:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15657 states, 11638 states have (on average 1.4512802887094003) internal successors, (16890), 11841 states have internal predecessors, (16890), 2898 states have call successors, (2898), 989 states have call predecessors, (2898), 1120 states have return successors, (7365), 2910 states have call predecessors, (7365), 2852 states have call successors, (7365) [2021-11-25 20:09:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15657 states to 15657 states and 27153 transitions. [2021-11-25 20:09:47,808 INFO L78 Accepts]: Start accepts. Automaton has 15657 states and 27153 transitions. Word has length 115 [2021-11-25 20:09:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:47,809 INFO L470 AbstractCegarLoop]: Abstraction has 15657 states and 27153 transitions. [2021-11-25 20:09:47,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 15657 states and 27153 transitions. [2021-11-25 20:09:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 20:09:47,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:47,817 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:47,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:48,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:09:48,037 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1196705317, now seen corresponding path program 1 times [2021-11-25 20:09:48,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:48,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676129457] [2021-11-25 20:09:48,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:48,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:09:48,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:48,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676129457] [2021-11-25 20:09:48,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676129457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:48,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899583136] [2021-11-25 20:09:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:48,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:48,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:48,162 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:48,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:09:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:48,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:09:48,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:09:48,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:09:48,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899583136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:09:48,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:09:48,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 20:09:48,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243446633] [2021-11-25 20:09:48,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:09:48,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:09:48,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:09:48,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:09:48,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:09:48,722 INFO L87 Difference]: Start difference. First operand 15657 states and 27153 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:09:50,619 INFO L93 Difference]: Finished difference Result 33780 states and 60840 transitions. [2021-11-25 20:09:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:09:50,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 116 [2021-11-25 20:09:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:09:50,759 INFO L225 Difference]: With dead ends: 33780 [2021-11-25 20:09:50,760 INFO L226 Difference]: Without dead ends: 19482 [2021-11-25 20:09:50,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:09:50,952 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 692 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:09:50,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 2376 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:09:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19482 states. [2021-11-25 20:09:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19482 to 18874. [2021-11-25 20:09:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18874 states, 13907 states have (on average 1.4505644639390236) internal successors, (20173), 14180 states have internal predecessors, (20173), 3602 states have call successors, (3602), 1228 states have call predecessors, (3602), 1364 states have return successors, (9721), 3573 states have call predecessors, (9721), 3547 states have call successors, (9721) [2021-11-25 20:09:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18874 states to 18874 states and 33496 transitions. [2021-11-25 20:09:52,543 INFO L78 Accepts]: Start accepts. Automaton has 18874 states and 33496 transitions. Word has length 116 [2021-11-25 20:09:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:09:52,544 INFO L470 AbstractCegarLoop]: Abstraction has 18874 states and 33496 transitions. [2021-11-25 20:09:52,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 20:09:52,544 INFO L276 IsEmpty]: Start isEmpty. Operand 18874 states and 33496 transitions. [2021-11-25 20:09:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-25 20:09:52,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:09:52,551 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:09:52,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:09:52,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:52,765 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:09:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:09:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash 463346682, now seen corresponding path program 1 times [2021-11-25 20:09:52,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:09:52,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233909077] [2021-11-25 20:09:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:52,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:09:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:09:52,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:09:52,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233909077] [2021-11-25 20:09:52,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233909077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:09:52,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28697305] [2021-11-25 20:09:52,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:09:52,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:09:52,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:09:52,873 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:09:52,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:09:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:09:53,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:09:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:09:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:09:53,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:09:53,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28697305] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:09:53,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821148945] [2021-11-25 20:09:53,815 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2021-11-25 20:09:53,815 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:09:53,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:09:53,828 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:09:53,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:10:00,394 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 20:10:39,831 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 578 for LOIs [2021-11-25 20:10:47,714 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 455 for LOIs [2021-11-25 20:10:49,864 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 510 for LOIs [2021-11-25 20:10:51,828 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 512 for LOIs [2021-11-25 20:10:52,139 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 509 for LOIs [2021-11-25 20:10:52,437 INFO L197 IcfgInterpreter]: Interpreting procedure existInLiftCallsInDirection with input of size 503 for LOIs [2021-11-25 20:11:01,292 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 460 for LOIs [2021-11-25 20:11:02,201 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 456 for LOIs [2021-11-25 20:11:02,283 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 20:11:02,372 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 548 for LOIs [2021-11-25 20:11:04,832 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 800 for LOIs [2021-11-25 20:11:08,838 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 649 for LOIs [2021-11-25 20:11:09,264 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:11:22,997 WARN L227 SmtUtils]: Spent 9.71s on a formula simplification. DAG size of input: 649 DAG size of output: 518 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:11:33,568 WARN L227 SmtUtils]: Spent 10.02s on a formula simplification. DAG size of input: 689 DAG size of output: 532 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:11:55,205 WARN L227 SmtUtils]: Spent 13.51s on a formula simplification. DAG size of input: 800 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:12:01,879 WARN L227 SmtUtils]: Spent 6.00s on a formula simplification that was a NOOP. DAG size: 787 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:14:45,440 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 585 DAG size of output: 503 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:15:36,867 WARN L227 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 605 DAG size of output: 544 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:15:36,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1821148945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:36,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:15:36,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [5, 6, 7] total 74 [2021-11-25 20:15:36,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704401892] [2021-11-25 20:15:36,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:36,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-25 20:15:36,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:36,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-25 20:15:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=4940, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 20:15:36,876 INFO L87 Difference]: Start difference. First operand 18874 states and 33496 transitions. Second operand has 62 states, 48 states have (on average 1.375) internal successors, (66), 41 states have internal predecessors, (66), 18 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2021-11-25 20:15:48,257 WARN L227 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 603 DAG size of output: 558 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:15:54,764 WARN L227 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 592 DAG size of output: 553 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:16:04,041 WARN L227 SmtUtils]: Spent 8.72s on a formula simplification. DAG size of input: 787 DAG size of output: 568 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:17:15,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:15,907 INFO L93 Difference]: Finished difference Result 37990 states and 67373 transitions. [2021-11-25 20:17:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-25 20:17:15,908 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 48 states have (on average 1.375) internal successors, (66), 41 states have internal predecessors, (66), 18 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 117 [2021-11-25 20:17:15,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:16,041 INFO L225 Difference]: With dead ends: 37990 [2021-11-25 20:17:16,041 INFO L226 Difference]: Without dead ends: 19139 [2021-11-25 20:17:16,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 273 SyntacticMatches, 9 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 323.0s TimeCoverageRelationStatistics Valid=557, Invalid=6583, Unknown=0, NotChecked=0, Total=7140 [2021-11-25 20:17:16,451 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 435 mSDsluCounter, 8643 mSDsCounter, 0 mSdLazyCounter, 12014 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 9111 SdHoareTripleChecker+Invalid, 13263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 12014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1105 IncrementalHoareTripleChecker+Unchecked, 42.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:16,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 9111 Invalid, 13263 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [144 Valid, 12014 Invalid, 0 Unknown, 1105 Unchecked, 42.4s Time] [2021-11-25 20:17:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19139 states. [2021-11-25 20:17:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19139 to 19063. [2021-11-25 20:17:17,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19063 states, 14037 states have (on average 1.4485288879390184) internal successors, (20333), 14312 states have internal predecessors, (20333), 3639 states have call successors, (3639), 1249 states have call predecessors, (3639), 1386 states have return successors, (9765), 3609 states have call predecessors, (9765), 3584 states have call successors, (9765) [2021-11-25 20:17:17,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19063 states to 19063 states and 33737 transitions. [2021-11-25 20:17:17,969 INFO L78 Accepts]: Start accepts. Automaton has 19063 states and 33737 transitions. Word has length 117 [2021-11-25 20:17:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:17,970 INFO L470 AbstractCegarLoop]: Abstraction has 19063 states and 33737 transitions. [2021-11-25 20:17:17,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 48 states have (on average 1.375) internal successors, (66), 41 states have internal predecessors, (66), 18 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2021-11-25 20:17:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 19063 states and 33737 transitions. [2021-11-25 20:17:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 20:17:17,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:17,978 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-11-25 20:17:18,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:17:18,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:17:18,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:18,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:18,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1900546780, now seen corresponding path program 1 times [2021-11-25 20:17:18,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:18,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903340096] [2021-11-25 20:17:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:18,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:17:18,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:18,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903340096] [2021-11-25 20:17:18,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903340096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:18,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:18,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 20:17:18,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723966608] [2021-11-25 20:17:18,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:18,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:17:18,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:18,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:17:18,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:17:18,499 INFO L87 Difference]: Start difference. First operand 19063 states and 33737 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 7 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-25 20:17:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:23,049 INFO L93 Difference]: Finished difference Result 44468 states and 86739 transitions. [2021-11-25 20:17:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 20:17:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 7 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 122 [2021-11-25 20:17:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:23,346 INFO L225 Difference]: With dead ends: 44468 [2021-11-25 20:17:23,347 INFO L226 Difference]: Without dead ends: 26452 [2021-11-25 20:17:23,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-11-25 20:17:23,462 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 1611 mSDsluCounter, 3365 mSDsCounter, 0 mSdLazyCounter, 5511 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 4205 SdHoareTripleChecker+Invalid, 6147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 5511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:23,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 4205 Invalid, 6147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 5511 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 20:17:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26452 states. [2021-11-25 20:17:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26452 to 20652. [2021-11-25 20:17:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20652 states, 15222 states have (on average 1.4471160162922085) internal successors, (22028), 15511 states have internal predecessors, (22028), 3867 states have call successors, (3867), 1360 states have call predecessors, (3867), 1562 states have return successors, (10440), 3888 states have call predecessors, (10440), 3812 states have call successors, (10440) [2021-11-25 20:17:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20652 states to 20652 states and 36335 transitions. [2021-11-25 20:17:25,135 INFO L78 Accepts]: Start accepts. Automaton has 20652 states and 36335 transitions. Word has length 122 [2021-11-25 20:17:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:25,136 INFO L470 AbstractCegarLoop]: Abstraction has 20652 states and 36335 transitions. [2021-11-25 20:17:25,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 7 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-25 20:17:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20652 states and 36335 transitions. [2021-11-25 20:17:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-25 20:17:25,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:25,145 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2021-11-25 20:17:25,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:17:25,145 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:25,146 INFO L85 PathProgramCache]: Analyzing trace with hash 107864207, now seen corresponding path program 1 times [2021-11-25 20:17:25,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:25,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971192799] [2021-11-25 20:17:25,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:25,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 20:17:25,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:25,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971192799] [2021-11-25 20:17:25,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971192799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:25,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:17:25,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:17:25,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071694240] [2021-11-25 20:17:25,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:25,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:17:25,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:25,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:17:25,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:17:25,268 INFO L87 Difference]: Start difference. First operand 20652 states and 36335 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:17:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:17:26,896 INFO L93 Difference]: Finished difference Result 42655 states and 77702 transitions. [2021-11-25 20:17:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:17:26,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 124 [2021-11-25 20:17:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:17:27,132 INFO L225 Difference]: With dead ends: 42655 [2021-11-25 20:17:27,132 INFO L226 Difference]: Without dead ends: 23085 [2021-11-25 20:17:27,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:17:27,291 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 119 mSDsluCounter, 3653 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 4193 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:17:27,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 4193 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:17:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23085 states. [2021-11-25 20:17:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23085 to 20883. [2021-11-25 20:17:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20883 states, 15404 states have (on average 1.4418332900545312) internal successors, (22210), 15714 states have internal predecessors, (22210), 3867 states have call successors, (3867), 1360 states have call predecessors, (3867), 1611 states have return successors, (10537), 3916 states have call predecessors, (10537), 3812 states have call successors, (10537) [2021-11-25 20:17:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20883 states to 20883 states and 36614 transitions. [2021-11-25 20:17:28,920 INFO L78 Accepts]: Start accepts. Automaton has 20883 states and 36614 transitions. Word has length 124 [2021-11-25 20:17:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:17:28,921 INFO L470 AbstractCegarLoop]: Abstraction has 20883 states and 36614 transitions. [2021-11-25 20:17:28,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:17:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 20883 states and 36614 transitions. [2021-11-25 20:17:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 20:17:28,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:17:28,928 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-11-25 20:17:28,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:17:28,929 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:17:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:17:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash -243050977, now seen corresponding path program 1 times [2021-11-25 20:17:28,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:17:28,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072250055] [2021-11-25 20:17:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:28,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:17:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:17:29,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:17:29,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072250055] [2021-11-25 20:17:29,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072250055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:17:29,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896003643] [2021-11-25 20:17:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:17:29,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:17:29,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:17:29,029 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:17:29,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f563ed46-b183-4bb6-aceb-0866d211f25d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:17:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:17:29,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:17:29,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:17:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:17:29,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:17:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 20:17:29,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896003643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:17:29,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1425090863] [2021-11-25 20:17:29,917 INFO L159 IcfgInterpreter]: Started Sifa with 103 locations of interest [2021-11-25 20:17:29,917 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:17:29,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:17:29,918 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:17:29,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:17:34,436 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs