./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba --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 7dffe766d259411d55a5393012f150d80e63eb09c0b69cb40e513f715e96f78e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:19:47,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:19:47,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:19:47,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:19:47,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:19:47,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:19:47,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:19:47,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:19:47,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:19:47,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:19:47,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:19:47,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:19:47,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:19:47,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:19:47,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:19:47,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:19:47,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:19:47,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:19:47,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:19:47,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:19:47,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:19:47,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:19:47,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:19:47,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:19:47,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:19:47,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:19:47,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:19:47,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:19:47,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:19:47,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:19:47,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:19:47,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:19:47,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:19:47,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:19:47,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:19:47,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:19:47,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:19:47,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:19:47,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:19:47,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:19:47,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:19:47,450 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:19:47,492 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:19:47,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:19:47,492 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:19:47,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:19:47,493 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:19:47,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:19:47,494 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:19:47,494 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:19:47,494 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:19:47,494 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:19:47,495 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:19:47,496 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:19:47,496 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:19:47,496 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:19:47,496 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:19:47,496 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:19:47,496 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:19:47,497 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:19:47,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:19:47,498 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:19:47,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:19:47,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:19:47,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:19:47,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:19:47,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:19:47,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:19:47,500 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:19:47,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:19:47,500 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:19:47,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:19:47,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:19:47,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:19:47,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:19:47,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:19:47,502 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:19:47,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:19:47,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:19:47,503 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:19:47,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:19:47,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:19:47,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:19:47,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7dffe766d259411d55a5393012f150d80e63eb09c0b69cb40e513f715e96f78e [2022-11-22 00:19:47,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:19:47,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:19:47,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:19:47,872 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:19:47,873 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:19:47,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c [2022-11-22 00:19:50,904 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:19:51,349 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:19:51,353 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c [2022-11-22 00:19:51,376 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/data/c3c37943f/fd66c22cdef045a88cadb29a6f25959d/FLAG88937db68 [2022-11-22 00:19:51,394 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/data/c3c37943f/fd66c22cdef045a88cadb29a6f25959d [2022-11-22 00:19:51,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:19:51,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:19:51,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:19:51,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:19:51,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:19:51,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:19:51" (1/1) ... [2022-11-22 00:19:51,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc25b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:51, skipping insertion in model container [2022-11-22 00:19:51,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:19:51" (1/1) ... [2022-11-22 00:19:51,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:19:51,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:19:51,817 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c[27637,27650] [2022-11-22 00:19:52,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:19:52,087 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:19:52,168 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/sv-benchmarks/c/product-lines/elevator_spec3_product25.cil.c[27637,27650] [2022-11-22 00:19:52,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:19:52,281 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:19:52,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52 WrapperNode [2022-11-22 00:19:52,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:19:52,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:19:52,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:19:52,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:19:52,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,405 INFO L138 Inliner]: procedures = 89, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 842 [2022-11-22 00:19:52,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:19:52,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:19:52,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:19:52,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:19:52,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,501 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:19:52,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:19:52,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:19:52,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:19:52,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (1/1) ... [2022-11-22 00:19:52,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:19:52,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:52,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:19:52,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:19:52,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:19:52,601 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-22 00:19:52,601 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-22 00:19:52,601 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 00:19:52,601 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 00:19:52,602 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 00:19:52,602 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 00:19:52,602 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 00:19:52,602 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 00:19:52,602 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-22 00:19:52,602 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-22 00:19:52,603 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 00:19:52,603 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 00:19:52,603 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 00:19:52,603 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 00:19:52,603 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 00:19:52,604 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 00:19:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 00:19:52,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 00:19:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 00:19:52,605 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 00:19:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 00:19:52,605 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 00:19:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 00:19:52,606 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 00:19:52,607 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-22 00:19:52,607 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-22 00:19:52,607 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 00:19:52,607 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 00:19:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 00:19:52,608 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 00:19:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-22 00:19:52,608 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-22 00:19:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 00:19:52,609 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 00:19:52,609 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 00:19:52,609 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 00:19:52,609 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 00:19:52,609 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 00:19:52,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:19:52,610 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 00:19:52,610 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 00:19:52,610 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 00:19:52,610 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 00:19:52,611 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 00:19:52,611 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 00:19:52,611 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 00:19:52,612 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 00:19:52,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:19:52,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:19:52,613 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 00:19:52,613 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 00:19:52,812 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:19:52,814 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:19:54,114 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:19:54,957 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:19:54,958 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 00:19:54,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:19:54 BoogieIcfgContainer [2022-11-22 00:19:54,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:19:54,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:19:54,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:19:54,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:19:54,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:19:51" (1/3) ... [2022-11-22 00:19:54,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59206b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:19:54, skipping insertion in model container [2022-11-22 00:19:54,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:19:52" (2/3) ... [2022-11-22 00:19:54,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59206b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:19:54, skipping insertion in model container [2022-11-22 00:19:54,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:19:54" (3/3) ... [2022-11-22 00:19:54,975 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product25.cil.c [2022-11-22 00:19:54,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:19:54,994 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:19:55,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:19:55,073 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@332fe028, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:19:55,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:19:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-22 00:19:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 00:19:55,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:55,118 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:55,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:55,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1886251950, now seen corresponding path program 1 times [2022-11-22 00:19:55,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:55,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92672395] [2022-11-22 00:19:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:55,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:19:56,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:56,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92672395] [2022-11-22 00:19:56,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92672395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:56,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827410353] [2022-11-22 00:19:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:56,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:56,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:56,106 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:56,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:19:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1524 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:19:56,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:56,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:19:56,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827410353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:56,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:19:56,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 00:19:56,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164969577] [2022-11-22 00:19:56,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:56,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:19:56,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:56,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:19:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:19:56,634 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 275 states have internal predecessors, (409), 100 states have call successors, (100), 24 states have call predecessors, (100), 24 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 00:19:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:57,043 INFO L93 Difference]: Finished difference Result 1074 states and 1734 transitions. [2022-11-22 00:19:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:19:57,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2022-11-22 00:19:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:57,068 INFO L225 Difference]: With dead ends: 1074 [2022-11-22 00:19:57,068 INFO L226 Difference]: Without dead ends: 693 [2022-11-22 00:19:57,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:19:57,090 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 494 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:57,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1549 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:19:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-22 00:19:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 681. [2022-11-22 00:19:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 462 states have (on average 1.5844155844155845) internal successors, (732), 493 states have internal predecessors, (732), 176 states have call successors, (176), 43 states have call predecessors, (176), 42 states have return successors, (178), 170 states have call predecessors, (178), 173 states have call successors, (178) [2022-11-22 00:19:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1086 transitions. [2022-11-22 00:19:57,265 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1086 transitions. Word has length 64 [2022-11-22 00:19:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:57,267 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1086 transitions. [2022-11-22 00:19:57,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-22 00:19:57,267 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1086 transitions. [2022-11-22 00:19:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 00:19:57,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:57,277 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:57,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 00:19:57,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 00:19:57,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash -932086722, now seen corresponding path program 1 times [2022-11-22 00:19:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:57,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142529403] [2022-11-22 00:19:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 00:19:57,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:57,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142529403] [2022-11-22 00:19:57,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142529403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:57,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247579926] [2022-11-22 00:19:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:57,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:57,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:57,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:57,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:19:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:58,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:19:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:19:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:58,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:19:58,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247579926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:58,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:19:58,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 00:19:58,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244595615] [2022-11-22 00:19:58,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:58,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:19:58,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:58,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:19:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:19:58,346 INFO L87 Difference]: Start difference. First operand 681 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 00:19:58,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:58,580 INFO L93 Difference]: Finished difference Result 1666 states and 2688 transitions. [2022-11-22 00:19:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:19:58,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-11-22 00:19:58,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:58,594 INFO L225 Difference]: With dead ends: 1666 [2022-11-22 00:19:58,594 INFO L226 Difference]: Without dead ends: 997 [2022-11-22 00:19:58,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:19:58,599 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 550 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:58,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1115 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:19:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-11-22 00:19:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 973. [2022-11-22 00:19:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 664 states have (on average 1.5933734939759037) internal successors, (1058), 710 states have internal predecessors, (1058), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2022-11-22 00:19:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1563 transitions. [2022-11-22 00:19:58,678 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1563 transitions. Word has length 63 [2022-11-22 00:19:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:58,679 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 1563 transitions. [2022-11-22 00:19:58,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 00:19:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1563 transitions. [2022-11-22 00:19:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 00:19:58,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:58,683 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:58,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:19:58,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:58,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash -950509246, now seen corresponding path program 1 times [2022-11-22 00:19:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21930383] [2022-11-22 00:19:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:19:59,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:59,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21930383] [2022-11-22 00:19:59,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21930383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:19:59,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:19:59,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:19:59,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668035508] [2022-11-22 00:19:59,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:19:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:19:59,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:19:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:19:59,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:19:59,127 INFO L87 Difference]: Start difference. First operand 973 states and 1563 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-22 00:19:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:19:59,486 INFO L93 Difference]: Finished difference Result 2206 states and 3603 transitions. [2022-11-22 00:19:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:19:59,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 64 [2022-11-22 00:19:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:19:59,497 INFO L225 Difference]: With dead ends: 2206 [2022-11-22 00:19:59,497 INFO L226 Difference]: Without dead ends: 1245 [2022-11-22 00:19:59,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:19:59,519 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 139 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:19:59,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1759 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:19:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-11-22 00:19:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 979. [2022-11-22 00:19:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 670 states have (on average 1.5880597014925373) internal successors, (1064), 716 states have internal predecessors, (1064), 249 states have call successors, (249), 59 states have call predecessors, (249), 59 states have return successors, (256), 242 states have call predecessors, (256), 246 states have call successors, (256) [2022-11-22 00:19:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1569 transitions. [2022-11-22 00:19:59,607 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1569 transitions. Word has length 64 [2022-11-22 00:19:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:19:59,608 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 1569 transitions. [2022-11-22 00:19:59,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-22 00:19:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1569 transitions. [2022-11-22 00:19:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 00:19:59,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:19:59,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:19:59,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:19:59,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:19:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:19:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1863073862, now seen corresponding path program 1 times [2022-11-22 00:19:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:19:59,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537220056] [2022-11-22 00:19:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:19:59,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:19:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 00:20:00,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:00,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537220056] [2022-11-22 00:20:00,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537220056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:00,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366798121] [2022-11-22 00:20:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:00,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:00,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:00,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:00,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:20:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:00,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1534 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:20:00,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:20:00,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:00,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366798121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:00,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:00,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 00:20:00,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017384072] [2022-11-22 00:20:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:00,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:20:00,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:20:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:20:00,485 INFO L87 Difference]: Start difference. First operand 979 states and 1569 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 00:20:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:00,894 INFO L93 Difference]: Finished difference Result 2796 states and 4528 transitions. [2022-11-22 00:20:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:20:00,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2022-11-22 00:20:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:00,907 INFO L225 Difference]: With dead ends: 2796 [2022-11-22 00:20:00,908 INFO L226 Difference]: Without dead ends: 1829 [2022-11-22 00:20:00,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:20:00,917 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 478 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:00,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1173 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:20:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-11-22 00:20:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1807. [2022-11-22 00:20:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1228 states have (on average 1.5390879478827362) internal successors, (1890), 1318 states have internal predecessors, (1890), 468 states have call successors, (468), 112 states have call predecessors, (468), 110 states have return successors, (503), 451 states have call predecessors, (503), 464 states have call successors, (503) [2022-11-22 00:20:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2861 transitions. [2022-11-22 00:20:01,033 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2861 transitions. Word has length 68 [2022-11-22 00:20:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:01,034 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2861 transitions. [2022-11-22 00:20:01,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 00:20:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2861 transitions. [2022-11-22 00:20:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-22 00:20:01,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:01,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:01,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:01,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:01,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:01,247 INFO L85 PathProgramCache]: Analyzing trace with hash 784617895, now seen corresponding path program 1 times [2022-11-22 00:20:01,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:01,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582709146] [2022-11-22 00:20:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:01,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 00:20:01,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:01,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582709146] [2022-11-22 00:20:01,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582709146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:01,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96551522] [2022-11-22 00:20:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:01,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:01,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:01,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:01,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:20:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:02,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:20:02,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:20:02,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:02,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96551522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:02,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:02,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-22 00:20:02,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448046240] [2022-11-22 00:20:02,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:02,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:20:02,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:02,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:20:02,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:20:02,214 INFO L87 Difference]: Start difference. First operand 1807 states and 2861 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 00:20:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:03,078 INFO L93 Difference]: Finished difference Result 3198 states and 5029 transitions. [2022-11-22 00:20:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:20:03,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-11-22 00:20:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:03,090 INFO L225 Difference]: With dead ends: 3198 [2022-11-22 00:20:03,090 INFO L226 Difference]: Without dead ends: 2042 [2022-11-22 00:20:03,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:20:03,097 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 534 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:03,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 2031 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:20:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2022-11-22 00:20:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 2023. [2022-11-22 00:20:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1402 states have (on average 1.5213980028530671) internal successors, (2133), 1495 states have internal predecessors, (2133), 495 states have call successors, (495), 124 states have call predecessors, (495), 125 states have return successors, (533), 478 states have call predecessors, (533), 491 states have call successors, (533) [2022-11-22 00:20:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 3161 transitions. [2022-11-22 00:20:03,225 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 3161 transitions. Word has length 72 [2022-11-22 00:20:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:03,226 INFO L495 AbstractCegarLoop]: Abstraction has 2023 states and 3161 transitions. [2022-11-22 00:20:03,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 00:20:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 3161 transitions. [2022-11-22 00:20:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 00:20:03,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:03,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:03,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:03,438 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash -456121376, now seen corresponding path program 1 times [2022-11-22 00:20:03,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:03,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855393000] [2022-11-22 00:20:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 00:20:03,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:03,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855393000] [2022-11-22 00:20:03,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855393000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:03,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388293646] [2022-11-22 00:20:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:03,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:03,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:03,824 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:03,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:20:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:04,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:20:04,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:20:04,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:04,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388293646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:04,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:04,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-22 00:20:04,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302424094] [2022-11-22 00:20:04,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:04,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:20:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:04,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:20:04,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:20:04,238 INFO L87 Difference]: Start difference. First operand 2023 states and 3161 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 00:20:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:04,568 INFO L93 Difference]: Finished difference Result 3782 states and 5980 transitions. [2022-11-22 00:20:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:20:04,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-11-22 00:20:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:04,583 INFO L225 Difference]: With dead ends: 3782 [2022-11-22 00:20:04,583 INFO L226 Difference]: Without dead ends: 2023 [2022-11-22 00:20:04,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:20:04,594 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 276 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:04,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 1549 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:20:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-11-22 00:20:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2023. [2022-11-22 00:20:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 1402 states have (on average 1.4828815977175465) internal successors, (2079), 1495 states have internal predecessors, (2079), 495 states have call successors, (495), 124 states have call predecessors, (495), 125 states have return successors, (533), 478 states have call predecessors, (533), 491 states have call successors, (533) [2022-11-22 00:20:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 3107 transitions. [2022-11-22 00:20:04,798 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 3107 transitions. Word has length 73 [2022-11-22 00:20:04,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:04,799 INFO L495 AbstractCegarLoop]: Abstraction has 2023 states and 3107 transitions. [2022-11-22 00:20:04,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 00:20:04,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 3107 transitions. [2022-11-22 00:20:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 00:20:04,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:04,804 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:04,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:05,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:05,012 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:05,012 INFO L85 PathProgramCache]: Analyzing trace with hash -511609884, now seen corresponding path program 1 times [2022-11-22 00:20:05,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:05,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41669788] [2022-11-22 00:20:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:05,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:20:05,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:05,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41669788] [2022-11-22 00:20:05,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41669788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:05,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734671475] [2022-11-22 00:20:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:05,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:05,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:05,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:05,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:20:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:05,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 00:20:05,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:20:06,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:20:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:20:06,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734671475] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:06,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:20:06,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-11-22 00:20:06,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092539209] [2022-11-22 00:20:06,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:06,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:20:06,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:06,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:20:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-22 00:20:06,388 INFO L87 Difference]: Start difference. First operand 2023 states and 3107 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 00:20:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:10,420 INFO L93 Difference]: Finished difference Result 4825 states and 7674 transitions. [2022-11-22 00:20:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 00:20:10,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-11-22 00:20:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:10,443 INFO L225 Difference]: With dead ends: 4825 [2022-11-22 00:20:10,443 INFO L226 Difference]: Without dead ends: 3670 [2022-11-22 00:20:10,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-22 00:20:10,454 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 2274 mSDsluCounter, 2555 mSDsCounter, 0 mSdLazyCounter, 2797 mSolverCounterSat, 1035 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2354 SdHoareTripleChecker+Valid, 3238 SdHoareTripleChecker+Invalid, 3832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1035 IncrementalHoareTripleChecker+Valid, 2797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:10,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2354 Valid, 3238 Invalid, 3832 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1035 Valid, 2797 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 00:20:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-11-22 00:20:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 3559. [2022-11-22 00:20:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 2529 states have (on average 1.4887307236061684) internal successors, (3765), 2672 states have internal predecessors, (3765), 802 states have call successors, (802), 216 states have call predecessors, (802), 227 states have return successors, (973), 778 states have call predecessors, (973), 797 states have call successors, (973) [2022-11-22 00:20:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5540 transitions. [2022-11-22 00:20:10,767 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5540 transitions. Word has length 75 [2022-11-22 00:20:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:10,768 INFO L495 AbstractCegarLoop]: Abstraction has 3559 states and 5540 transitions. [2022-11-22 00:20:10,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 00:20:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5540 transitions. [2022-11-22 00:20:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 00:20:10,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:10,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:10,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:10,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 00:20:10,983 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:10,983 INFO L85 PathProgramCache]: Analyzing trace with hash 841097752, now seen corresponding path program 1 times [2022-11-22 00:20:10,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:10,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042840385] [2022-11-22 00:20:10,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:10,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:20:11,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042840385] [2022-11-22 00:20:11,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042840385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:11,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425723544] [2022-11-22 00:20:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:11,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:11,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:11,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:20:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:20:11,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:20:11,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425723544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:11,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:11,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-22 00:20:11,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649175071] [2022-11-22 00:20:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:11,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:20:11,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:11,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:20:11,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:20:11,745 INFO L87 Difference]: Start difference. First operand 3559 states and 5540 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 00:20:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:12,683 INFO L93 Difference]: Finished difference Result 7442 states and 11785 transitions. [2022-11-22 00:20:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:20:12,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-11-22 00:20:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:12,712 INFO L225 Difference]: With dead ends: 7442 [2022-11-22 00:20:12,712 INFO L226 Difference]: Without dead ends: 3895 [2022-11-22 00:20:12,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:20:12,736 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 586 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:12,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 1926 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:20:12,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2022-11-22 00:20:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 3513. [2022-11-22 00:20:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 2483 states have (on average 1.4800644381796215) internal successors, (3675), 2630 states have internal predecessors, (3675), 809 states have call successors, (809), 204 states have call predecessors, (809), 220 states have return successors, (1073), 774 states have call predecessors, (1073), 804 states have call successors, (1073) [2022-11-22 00:20:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5557 transitions. [2022-11-22 00:20:13,053 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5557 transitions. Word has length 76 [2022-11-22 00:20:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:13,053 INFO L495 AbstractCegarLoop]: Abstraction has 3513 states and 5557 transitions. [2022-11-22 00:20:13,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 00:20:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5557 transitions. [2022-11-22 00:20:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-22 00:20:13,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:13,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:13,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:13,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:13,281 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2063686312, now seen corresponding path program 1 times [2022-11-22 00:20:13,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:13,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617480065] [2022-11-22 00:20:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:13,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 00:20:13,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617480065] [2022-11-22 00:20:13,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617480065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:13,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371003378] [2022-11-22 00:20:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:13,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:13,498 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:13,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:20:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:13,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1539 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:20:13,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:20:13,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:13,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371003378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:13,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:13,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 00:20:13,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792048689] [2022-11-22 00:20:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:13,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:20:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:20:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:20:13,936 INFO L87 Difference]: Start difference. First operand 3513 states and 5557 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 00:20:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:14,399 INFO L93 Difference]: Finished difference Result 7855 states and 12548 transitions. [2022-11-22 00:20:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:20:14,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-11-22 00:20:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:14,429 INFO L225 Difference]: With dead ends: 7855 [2022-11-22 00:20:14,430 INFO L226 Difference]: Without dead ends: 4354 [2022-11-22 00:20:14,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:20:14,452 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 528 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:14,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1232 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:20:14,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-11-22 00:20:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3468. [2022-11-22 00:20:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2598 states have internal predecessors, (3620), 800 states have call successors, (800), 201 states have call predecessors, (800), 214 states have return successors, (1033), 764 states have call predecessors, (1033), 795 states have call successors, (1033) [2022-11-22 00:20:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 5453 transitions. [2022-11-22 00:20:14,733 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 5453 transitions. Word has length 75 [2022-11-22 00:20:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:14,733 INFO L495 AbstractCegarLoop]: Abstraction has 3468 states and 5453 transitions. [2022-11-22 00:20:14,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 00:20:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 5453 transitions. [2022-11-22 00:20:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 00:20:14,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:14,737 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:14,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:14,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:14,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:14,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash -660152346, now seen corresponding path program 1 times [2022-11-22 00:20:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:14,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504443234] [2022-11-22 00:20:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:14,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 00:20:15,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:15,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504443234] [2022-11-22 00:20:15,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504443234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:15,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573808342] [2022-11-22 00:20:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:15,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:15,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:15,349 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:15,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:20:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:15,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 00:20:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:20:15,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:15,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573808342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:15,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:15,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-22 00:20:15,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281748835] [2022-11-22 00:20:15,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:15,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:20:15,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:20:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:20:15,843 INFO L87 Difference]: Start difference. First operand 3468 states and 5453 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 00:20:16,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:16,599 INFO L93 Difference]: Finished difference Result 6364 states and 10040 transitions. [2022-11-22 00:20:16,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:20:16,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-11-22 00:20:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:16,626 INFO L225 Difference]: With dead ends: 6364 [2022-11-22 00:20:16,626 INFO L226 Difference]: Without dead ends: 3489 [2022-11-22 00:20:16,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:20:16,642 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 414 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:16,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 2557 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:20:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-11-22 00:20:16,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3472. [2022-11-22 00:20:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 2453 states have (on average 1.4757439869547493) internal successors, (3620), 2602 states have internal predecessors, (3620), 804 states have call successors, (804), 201 states have call predecessors, (804), 214 states have return successors, (1037), 764 states have call predecessors, (1037), 799 states have call successors, (1037) [2022-11-22 00:20:17,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 5461 transitions. [2022-11-22 00:20:17,039 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 5461 transitions. Word has length 79 [2022-11-22 00:20:17,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:17,039 INFO L495 AbstractCegarLoop]: Abstraction has 3472 states and 5461 transitions. [2022-11-22 00:20:17,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-22 00:20:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 5461 transitions. [2022-11-22 00:20:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 00:20:17,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:17,045 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 00:20:17,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:17,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:17,253 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1812611093, now seen corresponding path program 1 times [2022-11-22 00:20:17,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:17,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238612078] [2022-11-22 00:20:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:17,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 00:20:17,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:17,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238612078] [2022-11-22 00:20:17,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238612078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:17,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839065539] [2022-11-22 00:20:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:17,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:17,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:17,624 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:17,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:20:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 00:20:17,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:20:18,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:18,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839065539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:18,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:18,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-22 00:20:18,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599505012] [2022-11-22 00:20:18,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:18,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:20:18,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:18,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:20:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:20:18,024 INFO L87 Difference]: Start difference. First operand 3472 states and 5461 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-22 00:20:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:18,477 INFO L93 Difference]: Finished difference Result 6681 states and 10752 transitions. [2022-11-22 00:20:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:20:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 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 99 [2022-11-22 00:20:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:18,502 INFO L225 Difference]: With dead ends: 6681 [2022-11-22 00:20:18,503 INFO L226 Difference]: Without dead ends: 3663 [2022-11-22 00:20:18,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:20:18,519 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 13 mSDsluCounter, 1660 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:18,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2224 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:20:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2022-11-22 00:20:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3546. [2022-11-22 00:20:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 2503 states have (on average 1.4662405113863364) internal successors, (3670), 2661 states have internal predecessors, (3670), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-22 00:20:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 5637 transitions. [2022-11-22 00:20:18,792 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 5637 transitions. Word has length 99 [2022-11-22 00:20:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:18,792 INFO L495 AbstractCegarLoop]: Abstraction has 3546 states and 5637 transitions. [2022-11-22 00:20:18,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-22 00:20:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 5637 transitions. [2022-11-22 00:20:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 00:20:18,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:18,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:18,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:19,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:20:19,008 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash 546420303, now seen corresponding path program 1 times [2022-11-22 00:20:19,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:19,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116415949] [2022-11-22 00:20:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:19,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 00:20:19,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:19,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116415949] [2022-11-22 00:20:19,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116415949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:19,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428399444] [2022-11-22 00:20:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:19,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:19,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:19,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:19,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:20:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:19,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:20:19,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:20:19,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:19,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428399444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:19,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:19,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-22 00:20:19,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361931389] [2022-11-22 00:20:19,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:19,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:20:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:20:19,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:20:19,915 INFO L87 Difference]: Start difference. First operand 3546 states and 5637 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-22 00:20:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:23,909 INFO L93 Difference]: Finished difference Result 7879 states and 12725 transitions. [2022-11-22 00:20:23,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 00:20:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-11-22 00:20:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:23,947 INFO L225 Difference]: With dead ends: 7879 [2022-11-22 00:20:23,947 INFO L226 Difference]: Without dead ends: 4229 [2022-11-22 00:20:23,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-22 00:20:23,964 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 1582 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 3706 mSolverCounterSat, 1056 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 4762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1056 IncrementalHoareTripleChecker+Valid, 3706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:23,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 1539 Invalid, 4762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1056 Valid, 3706 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-22 00:20:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2022-11-22 00:20:24,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 3541. [2022-11-22 00:20:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2498 states have (on average 1.466773418734988) internal successors, (3664), 2656 states have internal predecessors, (3664), 808 states have call successors, (808), 201 states have call predecessors, (808), 234 states have return successors, (1159), 779 states have call predecessors, (1159), 803 states have call successors, (1159) [2022-11-22 00:20:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5631 transitions. [2022-11-22 00:20:24,277 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5631 transitions. Word has length 117 [2022-11-22 00:20:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:24,277 INFO L495 AbstractCegarLoop]: Abstraction has 3541 states and 5631 transitions. [2022-11-22 00:20:24,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-11-22 00:20:24,277 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5631 transitions. [2022-11-22 00:20:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-22 00:20:24,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:24,285 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 00:20:24,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:24,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 00:20:24,493 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:24,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1284255827, now seen corresponding path program 1 times [2022-11-22 00:20:24,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:24,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640558997] [2022-11-22 00:20:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:24,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 00:20:24,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:24,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640558997] [2022-11-22 00:20:24,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640558997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:24,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618526070] [2022-11-22 00:20:24,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:24,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:24,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:24,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:24,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:20:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:25,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:20:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:20:25,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:25,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618526070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:25,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:25,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-22 00:20:25,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479024076] [2022-11-22 00:20:25,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:25,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:20:25,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:20:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:20:25,395 INFO L87 Difference]: Start difference. First operand 3541 states and 5631 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-22 00:20:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:25,966 INFO L93 Difference]: Finished difference Result 8268 states and 13378 transitions. [2022-11-22 00:20:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:20:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-11-22 00:20:25,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:26,003 INFO L225 Difference]: With dead ends: 8268 [2022-11-22 00:20:26,003 INFO L226 Difference]: Without dead ends: 4739 [2022-11-22 00:20:26,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 00:20:26,025 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 466 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:26,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 1211 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:20:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2022-11-22 00:20:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4671. [2022-11-22 00:20:26,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 3305 states have (on average 1.4686838124054462) internal successors, (4854), 3519 states have internal predecessors, (4854), 1055 states have call successors, (1055), 263 states have call predecessors, (1055), 310 states have return successors, (1504), 1020 states have call predecessors, (1504), 1050 states have call successors, (1504) [2022-11-22 00:20:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 7413 transitions. [2022-11-22 00:20:26,508 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 7413 transitions. Word has length 118 [2022-11-22 00:20:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:26,509 INFO L495 AbstractCegarLoop]: Abstraction has 4671 states and 7413 transitions. [2022-11-22 00:20:26,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-22 00:20:26,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 7413 transitions. [2022-11-22 00:20:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-22 00:20:26,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:26,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:26,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:26,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:26,730 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:26,730 INFO L85 PathProgramCache]: Analyzing trace with hash -431328819, now seen corresponding path program 1 times [2022-11-22 00:20:26,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:26,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564595] [2022-11-22 00:20:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:26,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 00:20:27,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:27,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564595] [2022-11-22 00:20:27,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:27,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705261746] [2022-11-22 00:20:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:27,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:27,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:27,104 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:27,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:20:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:27,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:20:27,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 00:20:27,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:27,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705261746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:27,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:27,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-22 00:20:27,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664609052] [2022-11-22 00:20:27,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:27,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:20:27,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:27,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:20:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:20:27,586 INFO L87 Difference]: Start difference. First operand 4671 states and 7413 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 00:20:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:29,064 INFO L93 Difference]: Finished difference Result 9373 states and 15236 transitions. [2022-11-22 00:20:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:20:29,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-11-22 00:20:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:29,101 INFO L225 Difference]: With dead ends: 9373 [2022-11-22 00:20:29,101 INFO L226 Difference]: Without dead ends: 5565 [2022-11-22 00:20:29,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:20:29,126 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 681 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:29,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1181 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 00:20:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5565 states. [2022-11-22 00:20:29,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5565 to 5449. [2022-11-22 00:20:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5449 states, 3753 states have (on average 1.4628297362110312) internal successors, (5490), 4013 states have internal predecessors, (5490), 1318 states have call successors, (1318), 339 states have call predecessors, (1318), 377 states have return successors, (1814), 1276 states have call predecessors, (1814), 1311 states have call successors, (1814) [2022-11-22 00:20:29,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5449 states to 5449 states and 8622 transitions. [2022-11-22 00:20:29,730 INFO L78 Accepts]: Start accepts. Automaton has 5449 states and 8622 transitions. Word has length 123 [2022-11-22 00:20:29,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:29,733 INFO L495 AbstractCegarLoop]: Abstraction has 5449 states and 8622 transitions. [2022-11-22 00:20:29,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 00:20:29,733 INFO L276 IsEmpty]: Start isEmpty. Operand 5449 states and 8622 transitions. [2022-11-22 00:20:29,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-22 00:20:29,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:29,743 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:29,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:29,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:29,951 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash -986205705, now seen corresponding path program 1 times [2022-11-22 00:20:29,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:29,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047186609] [2022-11-22 00:20:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:29,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 00:20:30,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:30,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047186609] [2022-11-22 00:20:30,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047186609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:30,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434573710] [2022-11-22 00:20:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:30,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:30,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:30,316 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:30,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:20:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:20:30,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 00:20:30,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:30,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434573710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:30,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:30,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-11-22 00:20:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317344747] [2022-11-22 00:20:30,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:30,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:20:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:20:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:20:30,755 INFO L87 Difference]: Start difference. First operand 5449 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 00:20:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:32,611 INFO L93 Difference]: Finished difference Result 13085 states and 21137 transitions. [2022-11-22 00:20:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:20:32,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-11-22 00:20:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:32,660 INFO L225 Difference]: With dead ends: 13085 [2022-11-22 00:20:32,660 INFO L226 Difference]: Without dead ends: 8477 [2022-11-22 00:20:32,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:20:32,693 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 555 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:32,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 1628 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 00:20:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2022-11-22 00:20:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 8459. [2022-11-22 00:20:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8459 states, 5713 states have (on average 1.465604761071241) internal successors, (8373), 6147 states have internal predecessors, (8373), 2160 states have call successors, (2160), 545 states have call predecessors, (2160), 585 states have return successors, (2844), 2090 states have call predecessors, (2844), 2149 states have call successors, (2844) [2022-11-22 00:20:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8459 states to 8459 states and 13377 transitions. [2022-11-22 00:20:33,588 INFO L78 Accepts]: Start accepts. Automaton has 8459 states and 13377 transitions. Word has length 124 [2022-11-22 00:20:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:33,588 INFO L495 AbstractCegarLoop]: Abstraction has 8459 states and 13377 transitions. [2022-11-22 00:20:33,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-22 00:20:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 8459 states and 13377 transitions. [2022-11-22 00:20:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-22 00:20:33,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:33,599 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:33,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:33,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 00:20:33,812 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:33,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1579359259, now seen corresponding path program 1 times [2022-11-22 00:20:33,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:33,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760550988] [2022-11-22 00:20:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:33,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 00:20:34,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:34,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760550988] [2022-11-22 00:20:34,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760550988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:34,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198537665] [2022-11-22 00:20:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:34,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:34,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:34,177 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:34,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 00:20:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:34,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 00:20:34,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:20:34,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:20:34,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198537665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:20:34,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:20:34,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-11-22 00:20:34,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645966779] [2022-11-22 00:20:34,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:20:34,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 00:20:34,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:20:34,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 00:20:34,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:20:34,708 INFO L87 Difference]: Start difference. First operand 8459 states and 13377 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-22 00:20:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:20:36,805 INFO L93 Difference]: Finished difference Result 21090 states and 33776 transitions. [2022-11-22 00:20:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:20:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-11-22 00:20:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:20:36,892 INFO L225 Difference]: With dead ends: 21090 [2022-11-22 00:20:36,893 INFO L226 Difference]: Without dead ends: 13494 [2022-11-22 00:20:36,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:20:36,968 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 663 mSDsluCounter, 3690 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 4383 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:20:36,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 4383 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 00:20:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2022-11-22 00:20:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 12003. [2022-11-22 00:20:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12003 states, 8049 states have (on average 1.4678842092185365) internal successors, (11815), 8678 states have internal predecessors, (11815), 3141 states have call successors, (3141), 759 states have call predecessors, (3141), 812 states have return successors, (4275), 3057 states have call predecessors, (4275), 3124 states have call successors, (4275) [2022-11-22 00:20:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12003 states to 12003 states and 19231 transitions. [2022-11-22 00:20:38,363 INFO L78 Accepts]: Start accepts. Automaton has 12003 states and 19231 transitions. Word has length 125 [2022-11-22 00:20:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:20:38,363 INFO L495 AbstractCegarLoop]: Abstraction has 12003 states and 19231 transitions. [2022-11-22 00:20:38,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-22 00:20:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 12003 states and 19231 transitions. [2022-11-22 00:20:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-22 00:20:38,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:20:38,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:20:38,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 00:20:38,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:38,584 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:20:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:20:38,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1863293010, now seen corresponding path program 1 times [2022-11-22 00:20:38,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:20:38,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136817903] [2022-11-22 00:20:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:38,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:20:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 00:20:38,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:20:38,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136817903] [2022-11-22 00:20:38,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136817903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:20:38,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737220674] [2022-11-22 00:20:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:20:38,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:20:38,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:20:38,957 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:20:38,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 00:20:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:20:39,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 00:20:39,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:20:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:20:39,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:20:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-22 00:20:39,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737220674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:20:39,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1594686691] [2022-11-22 00:20:39,849 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2022-11-22 00:20:39,849 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:20:39,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:20:39,859 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:20:39,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:20:48,588 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 689 for LOIs [2022-11-22 00:21:32,244 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 32 for LOIs [2022-11-22 00:21:32,247 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 45 for LOIs [2022-11-22 00:21:32,465 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 39 for LOIs [2022-11-22 00:21:32,467 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 452 for LOIs [2022-11-22 00:21:32,612 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 88 for LOIs [2022-11-22 00:21:32,629 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 599 for LOIs [2022-11-22 00:21:34,665 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 573 for LOIs [2022-11-22 00:21:34,847 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 42 for LOIs [2022-11-22 00:21:34,866 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 33 for LOIs [2022-11-22 00:21:34,868 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 573 for LOIs [2022-11-22 00:21:38,104 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2022-11-22 00:21:38,713 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2022-11-22 00:21:38,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:22:12,085 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:22:19,432 WARN L233 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:22:28,057 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 772 DAG size of output: 594 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:22:41,663 WARN L233 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 689 DAG size of output: 620 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:22:56,240 WARN L233 SmtUtils]: Spent 14.19s on a formula simplification. DAG size of input: 641 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:23:12,331 WARN L233 SmtUtils]: Spent 15.33s on a formula simplification. DAG size of input: 678 DAG size of output: 618 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:23:27,791 WARN L233 SmtUtils]: Spent 14.98s on a formula simplification. DAG size of input: 678 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:23:43,760 WARN L233 SmtUtils]: Spent 14.98s on a formula simplification. DAG size of input: 679 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:24:01,185 WARN L233 SmtUtils]: Spent 16.20s on a formula simplification. DAG size of input: 690 DAG size of output: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:24:16,946 WARN L233 SmtUtils]: Spent 15.19s on a formula simplification. DAG size of input: 677 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:24:24,714 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 678 DAG size of output: 586 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:24:49,603 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '244294#(and (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= ~floorButtons_0~0 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:24:49,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:24:49,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:24:49,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-22 00:24:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896412594] [2022-11-22 00:24:49,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:24:49,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 00:24:49,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:24:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 00:24:49,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2022-11-22 00:24:49,607 INFO L87 Difference]: Start difference. First operand 12003 states and 19231 transitions. Second operand has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-22 00:25:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:12,968 INFO L93 Difference]: Finished difference Result 59107 states and 103734 transitions. [2022-11-22 00:25:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-22 00:25:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) Word has length 127 [2022-11-22 00:25:12,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:13,298 INFO L225 Difference]: With dead ends: 59107 [2022-11-22 00:25:13,299 INFO L226 Difference]: Without dead ends: 41771 [2022-11-22 00:25:13,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 333 SyntacticMatches, 12 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11646 ImplicationChecksByTransitivity, 193.5s TimeCoverageRelationStatistics Valid=1590, Invalid=26802, Unknown=0, NotChecked=0, Total=28392 [2022-11-22 00:25:13,495 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 5643 mSDsluCounter, 7954 mSDsCounter, 0 mSdLazyCounter, 21597 mSolverCounterSat, 3418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5813 SdHoareTripleChecker+Valid, 8820 SdHoareTripleChecker+Invalid, 25015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3418 IncrementalHoareTripleChecker+Valid, 21597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:13,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5813 Valid, 8820 Invalid, 25015 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3418 Valid, 21597 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2022-11-22 00:25:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41771 states. [2022-11-22 00:25:17,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41771 to 32215. [2022-11-22 00:25:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32215 states, 21688 states have (on average 1.4644964957580229) internal successors, (31762), 23747 states have internal predecessors, (31762), 8517 states have call successors, (8517), 1763 states have call predecessors, (8517), 2009 states have return successors, (13581), 7722 states have call predecessors, (13581), 8489 states have call successors, (13581) [2022-11-22 00:25:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32215 states to 32215 states and 53860 transitions. [2022-11-22 00:25:17,996 INFO L78 Accepts]: Start accepts. Automaton has 32215 states and 53860 transitions. Word has length 127 [2022-11-22 00:25:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:17,997 INFO L495 AbstractCegarLoop]: Abstraction has 32215 states and 53860 transitions. [2022-11-22 00:25:17,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 8 states have call successors, (49), 4 states have call predecessors, (49), 10 states have return successors, (48), 11 states have call predecessors, (48), 8 states have call successors, (48) [2022-11-22 00:25:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 32215 states and 53860 transitions. [2022-11-22 00:25:18,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-22 00:25:18,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:18,160 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:18,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 00:25:18,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 00:25:18,368 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1861160553, now seen corresponding path program 1 times [2022-11-22 00:25:18,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:18,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495316172] [2022-11-22 00:25:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:18,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 00:25:19,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:19,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495316172] [2022-11-22 00:25:19,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495316172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:25:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864174438] [2022-11-22 00:25:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:19,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:25:19,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:25:19,074 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:25:19,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 00:25:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:25:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:25:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 00:25:19,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:25:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864174438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:19,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:25:19,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2022-11-22 00:25:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417207639] [2022-11-22 00:25:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:25:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:25:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:25:19,473 INFO L87 Difference]: Start difference. First operand 32215 states and 53860 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-22 00:25:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:22,950 INFO L93 Difference]: Finished difference Result 65013 states and 111509 transitions. [2022-11-22 00:25:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:25:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 136 [2022-11-22 00:25:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:23,442 INFO L225 Difference]: With dead ends: 65013 [2022-11-22 00:25:23,443 INFO L226 Difference]: Without dead ends: 30166 [2022-11-22 00:25:23,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:25:23,826 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 180 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:23,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1563 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:25:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30166 states. [2022-11-22 00:25:26,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30166 to 30109. [2022-11-22 00:25:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30109 states, 19942 states have (on average 1.4520108314110922) internal successors, (28956), 21976 states have internal predecessors, (28956), 8230 states have call successors, (8230), 1718 states have call predecessors, (8230), 1936 states have return successors, (12940), 7432 states have call predecessors, (12940), 8202 states have call successors, (12940) [2022-11-22 00:25:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30109 states to 30109 states and 50126 transitions. [2022-11-22 00:25:27,442 INFO L78 Accepts]: Start accepts. Automaton has 30109 states and 50126 transitions. Word has length 136 [2022-11-22 00:25:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:27,442 INFO L495 AbstractCegarLoop]: Abstraction has 30109 states and 50126 transitions. [2022-11-22 00:25:27,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-11-22 00:25:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 30109 states and 50126 transitions. [2022-11-22 00:25:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-22 00:25:27,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:27,457 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:27,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 00:25:27,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 00:25:27,665 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1372281923, now seen corresponding path program 1 times [2022-11-22 00:25:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:27,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236032425] [2022-11-22 00:25:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:27,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-22 00:25:28,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:28,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236032425] [2022-11-22 00:25:28,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236032425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:25:28,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694428941] [2022-11-22 00:25:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:28,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:25:28,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:25:28,852 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:25:28,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 00:25:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 00:25:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:25:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 00:25:29,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:25:29,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694428941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:29,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:25:29,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-11-22 00:25:29,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120533651] [2022-11-22 00:25:29,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:29,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:25:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:29,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:25:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:25:29,347 INFO L87 Difference]: Start difference. First operand 30109 states and 50126 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-22 00:25:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:34,265 INFO L93 Difference]: Finished difference Result 57863 states and 96877 transitions. [2022-11-22 00:25:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:25:34,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2022-11-22 00:25:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:34,425 INFO L225 Difference]: With dead ends: 57863 [2022-11-22 00:25:34,425 INFO L226 Difference]: Without dead ends: 29222 [2022-11-22 00:25:34,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-22 00:25:34,597 INFO L413 NwaCegarLoop]: 944 mSDtfsCounter, 597 mSDsluCounter, 3590 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 4534 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:34,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 4534 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 00:25:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29222 states. [2022-11-22 00:25:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29222 to 27605. [2022-11-22 00:25:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27605 states, 18331 states have (on average 1.45125743276417) internal successors, (26603), 20142 states have internal predecessors, (26603), 7379 states have call successors, (7379), 1683 states have call predecessors, (7379), 1894 states have return successors, (11238), 6705 states have call predecessors, (11238), 7343 states have call successors, (11238) [2022-11-22 00:25:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27605 states to 27605 states and 45220 transitions. [2022-11-22 00:25:37,728 INFO L78 Accepts]: Start accepts. Automaton has 27605 states and 45220 transitions. Word has length 139 [2022-11-22 00:25:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:25:37,729 INFO L495 AbstractCegarLoop]: Abstraction has 27605 states and 45220 transitions. [2022-11-22 00:25:37,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-22 00:25:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 27605 states and 45220 transitions. [2022-11-22 00:25:37,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-22 00:25:37,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:25:37,740 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:25:37,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 00:25:37,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:25:37,949 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:25:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:25:37,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1294419719, now seen corresponding path program 1 times [2022-11-22 00:25:37,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:25:37,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182793181] [2022-11-22 00:25:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:37,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:25:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-22 00:25:38,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:25:38,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182793181] [2022-11-22 00:25:38,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182793181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:25:38,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056430378] [2022-11-22 00:25:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:25:38,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:25:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:25:38,558 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:25:38,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5398800-7108-409b-a313-33a57d499b4b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 00:25:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:25:38,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:25:38,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:25:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 00:25:38,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:25:38,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056430378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:25:38,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:25:38,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2022-11-22 00:25:38,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341402997] [2022-11-22 00:25:38,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:25:38,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:25:38,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:25:38,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:25:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:25:38,945 INFO L87 Difference]: Start difference. First operand 27605 states and 45220 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-22 00:25:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:25:41,974 INFO L93 Difference]: Finished difference Result 50097 states and 83688 transitions. [2022-11-22 00:25:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:25:41,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 141 [2022-11-22 00:25:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:25:42,146 INFO L225 Difference]: With dead ends: 50097 [2022-11-22 00:25:42,147 INFO L226 Difference]: Without dead ends: 23950 [2022-11-22 00:25:42,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-22 00:25:42,400 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 100 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:25:42,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1283 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:25:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23950 states.