./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:22:03,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:22:03,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:22:03,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:22:03,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:22:03,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:22:03,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:22:03,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:22:03,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:22:03,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:22:03,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:22:03,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:22:03,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:22:03,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:22:03,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:22:03,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:22:03,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:22:03,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:22:03,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:22:03,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:22:03,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:22:03,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:22:03,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:22:03,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:22:03,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:22:03,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:22:03,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:22:03,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:22:03,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:22:03,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:22:03,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:22:03,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:22:03,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:22:03,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:22:03,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:22:03,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:22:03,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:22:03,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:22:03,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:22:03,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:22:03,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:22:03,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:22:03,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:22:03,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:22:03,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:22:03,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:22:03,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:22:03,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:22:03,482 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:22:03,482 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:22:03,483 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:22:03,483 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:22:03,483 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:22:03,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:22:03,483 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:22:03,484 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:22:03,484 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:22:03,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:22:03,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:22:03,484 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:22:03,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:22:03,485 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:22:03,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:22:03,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:22:03,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:22:03,486 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:22:03,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:22:03,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:22:03,487 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:22:03,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:22:03,487 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:22:03,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:22:03,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:22:03,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:22:03,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:22:03,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:22:03,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:22:03,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:22:03,489 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:22:03,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:22:03,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:22:03,490 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:22:03,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:22:03,490 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67b10dcf95f436cfd8f02a55d7d1d272656f1382a4eb6ab4ad3bba992e95e024 [2021-11-25 18:22:03,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:22:03,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:22:03,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:22:03,808 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:22:03,809 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:22:03,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-25 18:22:03,876 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/data/08860445d/a6801de7831a4c7984a5dd165b84b7a1/FLAGc12159342 [2021-11-25 18:22:04,687 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:22:04,688 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c [2021-11-25 18:22:04,710 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/data/08860445d/a6801de7831a4c7984a5dd165b84b7a1/FLAGc12159342 [2021-11-25 18:22:04,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/data/08860445d/a6801de7831a4c7984a5dd165b84b7a1 [2021-11-25 18:22:04,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:22:04,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:22:04,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:22:04,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:22:04,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:22:04,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:22:04" (1/1) ... [2021-11-25 18:22:04,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a93759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:04, skipping insertion in model container [2021-11-25 18:22:04,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:22:04" (1/1) ... [2021-11-25 18:22:04,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:22:04,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:22:05,102 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-25 18:22:05,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:22:05,412 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:22:05,488 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/sv-benchmarks/c/product-lines/elevator_spec3_product09.cil.c[21710,21723] [2021-11-25 18:22:05,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:22:05,630 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:22:05,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05 WrapperNode [2021-11-25 18:22:05,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:22:05,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:22:05,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:22:05,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:22:05,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,757 INFO L137 Inliner]: procedures = 87, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 808 [2021-11-25 18:22:05,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:22:05,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:22:05,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:22:05,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:22:05,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:22:05,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:22:05,831 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:22:05,831 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:22:05,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (1/1) ... [2021-11-25 18:22:05,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:22:05,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:05,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:22:05,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:22:05,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:22:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-25 18:22:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-25 18:22:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 18:22:05,925 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 18:22:05,925 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 18:22:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 18:22:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 18:22:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 18:22:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 18:22:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 18:22:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 18:22:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 18:22:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 18:22:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 18:22:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 18:22:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 18:22:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 18:22:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 18:22:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 18:22:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 18:22:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 18:22:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 18:22:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-25 18:22:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-25 18:22:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 18:22:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 18:22:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-25 18:22:05,929 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-25 18:22:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 18:22:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 18:22:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 18:22:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 18:22:05,930 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 18:22:05,930 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 18:22:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 18:22:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 18:22:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:22:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 18:22:05,931 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 18:22:05,931 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 18:22:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 18:22:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 18:22:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 18:22:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 18:22:05,932 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 18:22:05,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:22:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:22:05,933 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 18:22:05,933 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 18:22:06,113 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:22:06,115 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:22:07,257 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:22:07,816 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:22:07,816 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:22:07,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:22:07 BoogieIcfgContainer [2021-11-25 18:22:07,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:22:07,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:22:07,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:22:07,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:22:07,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:22:04" (1/3) ... [2021-11-25 18:22:07,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f46dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:22:07, skipping insertion in model container [2021-11-25 18:22:07,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:05" (2/3) ... [2021-11-25 18:22:07,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15f46dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:22:07, skipping insertion in model container [2021-11-25 18:22:07,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:22:07" (3/3) ... [2021-11-25 18:22:07,831 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product09.cil.c [2021-11-25 18:22:07,838 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:22:07,838 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:22:07,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:22:07,917 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:22:07,917 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:22:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-25 18:22:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 18:22:07,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:07,994 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:22:07,994 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:07,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash 13643139, now seen corresponding path program 1 times [2021-11-25 18:22:08,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:08,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72591591] [2021-11-25 18:22:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:08,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:22:08,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72591591] [2021-11-25 18:22:08,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72591591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:08,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:08,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:22:08,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846989574] [2021-11-25 18:22:08,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:08,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:08,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:08,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:22:08,582 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-25 18:22:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:09,521 INFO L93 Difference]: Finished difference Result 1069 states and 1731 transitions. [2021-11-25 18:22:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:22:09,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2021-11-25 18:22:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:09,545 INFO L225 Difference]: With dead ends: 1069 [2021-11-25 18:22:09,546 INFO L226 Difference]: Without dead ends: 694 [2021-11-25 18:22:09,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:22:09,564 INFO L933 BasicCegarLoop]: 618 mSDtfsCounter, 511 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:09,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 1731 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:22:09,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-11-25 18:22:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 686. [2021-11-25 18:22:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 465 states have (on average 1.5225806451612902) internal successors, (708), 495 states have internal predecessors, (708), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2021-11-25 18:22:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 1069 transitions. [2021-11-25 18:22:09,694 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 1069 transitions. Word has length 63 [2021-11-25 18:22:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:09,695 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 1069 transitions. [2021-11-25 18:22:09,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-25 18:22:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 1069 transitions. [2021-11-25 18:22:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 18:22:09,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:09,701 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1] [2021-11-25 18:22:09,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:22:09,701 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:09,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:09,702 INFO L85 PathProgramCache]: Analyzing trace with hash 19520656, now seen corresponding path program 1 times [2021-11-25 18:22:09,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:09,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264640239] [2021-11-25 18:22:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:09,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:22:09,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:09,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264640239] [2021-11-25 18:22:09,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264640239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:09,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:09,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:22:09,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510922952] [2021-11-25 18:22:09,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:09,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:09,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:22:09,849 INFO L87 Difference]: Start difference. First operand 686 states and 1069 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-25 18:22:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:10,201 INFO L93 Difference]: Finished difference Result 1320 states and 2107 transitions. [2021-11-25 18:22:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:22:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 68 [2021-11-25 18:22:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:10,213 INFO L225 Difference]: With dead ends: 1320 [2021-11-25 18:22:10,213 INFO L226 Difference]: Without dead ends: 876 [2021-11-25 18:22:10,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:22:10,223 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 139 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:10,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1747 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:22:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-11-25 18:22:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 690. [2021-11-25 18:22:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 469 states have (on average 1.5181236673773988) internal successors, (712), 499 states have internal predecessors, (712), 180 states have call successors, (180), 43 states have call predecessors, (180), 40 states have return successors, (181), 172 states have call predecessors, (181), 176 states have call successors, (181) [2021-11-25 18:22:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1073 transitions. [2021-11-25 18:22:10,304 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1073 transitions. Word has length 68 [2021-11-25 18:22:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:10,304 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1073 transitions. [2021-11-25 18:22:10,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-25 18:22:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1073 transitions. [2021-11-25 18:22:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 18:22:10,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:10,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:10,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:22:10,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:10,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1309187174, now seen corresponding path program 1 times [2021-11-25 18:22:10,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:10,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30111435] [2021-11-25 18:22:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:10,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:22:10,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:10,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30111435] [2021-11-25 18:22:10,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30111435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:10,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251909095] [2021-11-25 18:22:10,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:10,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:10,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:10,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:10,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:22:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:10,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:22:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:22:11,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:11,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251909095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:11,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:11,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-25 18:22:11,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593828581] [2021-11-25 18:22:11,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:11,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:22:11,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:22:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:22:11,176 INFO L87 Difference]: Start difference. First operand 690 states and 1073 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) [2021-11-25 18:22:11,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:11,785 INFO L93 Difference]: Finished difference Result 1143 states and 1781 transitions. [2021-11-25 18:22:11,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:22:11,785 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 [2021-11-25 18:22:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:11,795 INFO L225 Difference]: With dead ends: 1143 [2021-11-25 18:22:11,795 INFO L226 Difference]: Without dead ends: 698 [2021-11-25 18:22:11,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:22:11,801 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 420 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:11,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 2295 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:22:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-25 18:22:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 694. [2021-11-25 18:22:11,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.515923566878981) internal successors, (714), 502 states have internal predecessors, (714), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2021-11-25 18:22:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1076 transitions. [2021-11-25 18:22:11,871 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1076 transitions. Word has length 72 [2021-11-25 18:22:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:11,873 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1076 transitions. [2021-11-25 18:22:11,873 INFO L471 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) [2021-11-25 18:22:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1076 transitions. [2021-11-25 18:22:11,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 18:22:11,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:11,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:11,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:12,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:12,098 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:12,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:12,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1183509830, now seen corresponding path program 1 times [2021-11-25 18:22:12,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:12,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921655961] [2021-11-25 18:22:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:12,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:22:12,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:12,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921655961] [2021-11-25 18:22:12,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921655961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:12,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461202450] [2021-11-25 18:22:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:12,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:12,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:12,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:12,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:22:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:12,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:22:12,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:22:12,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:12,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461202450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:12,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:12,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-25 18:22:12,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634170718] [2021-11-25 18:22:12,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:12,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:12,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:12,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:12,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:22:12,738 INFO L87 Difference]: Start difference. First operand 694 states and 1076 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) [2021-11-25 18:22:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:12,970 INFO L93 Difference]: Finished difference Result 1242 states and 1958 transitions. [2021-11-25 18:22:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:22:12,971 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 [2021-11-25 18:22:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:12,978 INFO L225 Difference]: With dead ends: 1242 [2021-11-25 18:22:12,978 INFO L226 Difference]: Without dead ends: 694 [2021-11-25 18:22:12,982 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:22:12,983 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 269 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:12,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 1544 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:22:12,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-11-25 18:22:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2021-11-25 18:22:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 471 states have (on average 1.4861995753715498) internal successors, (700), 502 states have internal predecessors, (700), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (182), 172 states have call predecessors, (182), 176 states have call successors, (182) [2021-11-25 18:22:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1062 transitions. [2021-11-25 18:22:13,029 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1062 transitions. Word has length 73 [2021-11-25 18:22:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:13,030 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1062 transitions. [2021-11-25 18:22:13,030 INFO L471 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) [2021-11-25 18:22:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1062 transitions. [2021-11-25 18:22:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 18:22:13,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:13,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:13,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:13,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:13,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2120738951, now seen corresponding path program 1 times [2021-11-25 18:22:13,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:13,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559852649] [2021-11-25 18:22:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:13,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:22:13,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:13,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559852649] [2021-11-25 18:22:13,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559852649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:13,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608032734] [2021-11-25 18:22:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:13,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:13,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:13,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:22:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:13,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 18:22:13,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:22:14,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:22:14,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608032734] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:14,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:22:14,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2021-11-25 18:22:14,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544727678] [2021-11-25 18:22:14,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:14,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:22:14,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:14,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:22:14,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:22:14,481 INFO L87 Difference]: Start difference. First operand 694 states and 1062 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) [2021-11-25 18:22:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:17,777 INFO L93 Difference]: Finished difference Result 1635 states and 2612 transitions. [2021-11-25 18:22:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:22:17,783 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 [2021-11-25 18:22:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:17,799 INFO L225 Difference]: With dead ends: 1635 [2021-11-25 18:22:17,800 INFO L226 Difference]: Without dead ends: 1275 [2021-11-25 18:22:17,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:22:17,808 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 2815 mSDsluCounter, 2348 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 1328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2894 SdHoareTripleChecker+Valid, 2904 SdHoareTripleChecker+Invalid, 3690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1328 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:17,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2894 Valid, 2904 Invalid, 3690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1328 Valid, 2362 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 18:22:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-11-25 18:22:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1205. [2021-11-25 18:22:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 838 states have (on average 1.5023866348448687) internal successors, (1259), 885 states have internal predecessors, (1259), 292 states have call successors, (292), 73 states have call predecessors, (292), 74 states have return successors, (329), 282 states have call predecessors, (329), 287 states have call successors, (329) [2021-11-25 18:22:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1880 transitions. [2021-11-25 18:22:17,947 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1880 transitions. Word has length 75 [2021-11-25 18:22:17,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:17,949 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 1880 transitions. [2021-11-25 18:22:17,949 INFO L471 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) [2021-11-25 18:22:17,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1880 transitions. [2021-11-25 18:22:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:22:17,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:17,952 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:17,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:18,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:18,178 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:18,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:18,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2022540589, now seen corresponding path program 1 times [2021-11-25 18:22:18,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:18,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208262197] [2021-11-25 18:22:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:18,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:22:18,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:18,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208262197] [2021-11-25 18:22:18,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208262197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:18,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265477803] [2021-11-25 18:22:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:18,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:18,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:18,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:18,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:22:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:18,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:22:18,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:22:18,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:18,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265477803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:18,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:18,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 18:22:18,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675633519] [2021-11-25 18:22:18,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:18,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:18,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:18,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:18,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:22:18,789 INFO L87 Difference]: Start difference. First operand 1205 states and 1880 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 18:22:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:19,062 INFO L93 Difference]: Finished difference Result 3440 states and 5513 transitions. [2021-11-25 18:22:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:19,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 76 [2021-11-25 18:22:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:19,084 INFO L225 Difference]: With dead ends: 3440 [2021-11-25 18:22:19,084 INFO L226 Difference]: Without dead ends: 2247 [2021-11-25 18:22:19,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:22:19,096 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 459 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:19,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1341 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-11-25 18:22:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2191. [2021-11-25 18:22:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 1534 states have (on average 1.5097783572359844) internal successors, (2316), 1629 states have internal predecessors, (2316), 516 states have call successors, (516), 131 states have call predecessors, (516), 140 states have return successors, (608), 502 states have call predecessors, (608), 511 states have call successors, (608) [2021-11-25 18:22:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 3440 transitions. [2021-11-25 18:22:19,265 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 3440 transitions. Word has length 76 [2021-11-25 18:22:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:19,266 INFO L470 AbstractCegarLoop]: Abstraction has 2191 states and 3440 transitions. [2021-11-25 18:22:19,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 18:22:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 3440 transitions. [2021-11-25 18:22:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 18:22:19,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:19,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:19,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:19,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:19,489 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:19,490 INFO L85 PathProgramCache]: Analyzing trace with hash 152698590, now seen corresponding path program 1 times [2021-11-25 18:22:19,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:19,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983052805] [2021-11-25 18:22:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:19,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:22:19,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:19,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983052805] [2021-11-25 18:22:19,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983052805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:19,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463083598] [2021-11-25 18:22:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:19,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:19,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:19,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:19,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:22:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:19,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:22:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:22:20,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:20,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463083598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:20,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:20,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-25 18:22:20,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681742382] [2021-11-25 18:22:20,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:20,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:20,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:22:20,080 INFO L87 Difference]: Start difference. First operand 2191 states and 3440 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) [2021-11-25 18:22:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:20,370 INFO L93 Difference]: Finished difference Result 5112 states and 8137 transitions. [2021-11-25 18:22:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:20,371 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 [2021-11-25 18:22:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:20,401 INFO L225 Difference]: With dead ends: 5112 [2021-11-25 18:22:20,401 INFO L226 Difference]: Without dead ends: 2933 [2021-11-25 18:22:20,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:22:20,421 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 521 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:20,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1080 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2021-11-25 18:22:20,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2889. [2021-11-25 18:22:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (797), 652 states have call predecessors, (797), 664 states have call successors, (797) [2021-11-25 18:22:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4555 transitions. [2021-11-25 18:22:20,698 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4555 transitions. Word has length 75 [2021-11-25 18:22:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:20,698 INFO L470 AbstractCegarLoop]: Abstraction has 2889 states and 4555 transitions. [2021-11-25 18:22:20,699 INFO L471 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) [2021-11-25 18:22:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4555 transitions. [2021-11-25 18:22:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 18:22:20,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:20,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:20,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:20,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:20,930 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:20,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:20,930 INFO L85 PathProgramCache]: Analyzing trace with hash -154683306, now seen corresponding path program 1 times [2021-11-25 18:22:20,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:20,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279206906] [2021-11-25 18:22:20,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:20,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:22:21,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:21,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279206906] [2021-11-25 18:22:21,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279206906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:21,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065724295] [2021-11-25 18:22:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:21,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:21,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:21,063 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:21,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:22:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:21,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:22:21,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:22:21,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:21,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065724295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:21,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:21,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-25 18:22:21,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120795466] [2021-11-25 18:22:21,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:21,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:22:21,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:22:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:22:21,585 INFO L87 Difference]: Start difference. First operand 2889 states and 4555 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) [2021-11-25 18:22:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:22,257 INFO L93 Difference]: Finished difference Result 5184 states and 8208 transitions. [2021-11-25 18:22:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:22:22,258 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 [2021-11-25 18:22:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:22,288 INFO L225 Difference]: With dead ends: 5184 [2021-11-25 18:22:22,288 INFO L226 Difference]: Without dead ends: 2897 [2021-11-25 18:22:22,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:22:22,308 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 396 mSDsluCounter, 1898 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:22,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 2513 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:22:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-11-25 18:22:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2889. [2021-11-25 18:22:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2035 states have (on average 1.517936117936118) internal successors, (3089), 2162 states have internal predecessors, (3089), 669 states have call successors, (669), 170 states have call predecessors, (669), 184 states have return successors, (793), 652 states have call predecessors, (793), 664 states have call successors, (793) [2021-11-25 18:22:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 4551 transitions. [2021-11-25 18:22:22,583 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 4551 transitions. Word has length 79 [2021-11-25 18:22:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:22,584 INFO L470 AbstractCegarLoop]: Abstraction has 2889 states and 4551 transitions. [2021-11-25 18:22:22,585 INFO L471 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) [2021-11-25 18:22:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 4551 transitions. [2021-11-25 18:22:22,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 18:22:22,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:22,591 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:22:22,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:22,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:22,818 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:22,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:22,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1242674534, now seen corresponding path program 1 times [2021-11-25 18:22:22,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:22,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329014730] [2021-11-25 18:22:22,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:22,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:22:22,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329014730] [2021-11-25 18:22:22,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329014730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:22,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147092593] [2021-11-25 18:22:22,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:22,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:22,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:22,979 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:23,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:22:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:22:23,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:22:23,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:23,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147092593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:23,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:23,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-25 18:22:23,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539667862] [2021-11-25 18:22:23,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:23,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:22:23,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:23,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:22:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:22:23,508 INFO L87 Difference]: Start difference. First operand 2889 states and 4551 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) [2021-11-25 18:22:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:23,827 INFO L93 Difference]: Finished difference Result 5459 states and 8715 transitions. [2021-11-25 18:22:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:22:23,828 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 [2021-11-25 18:22:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:23,863 INFO L225 Difference]: With dead ends: 5459 [2021-11-25 18:22:23,864 INFO L226 Difference]: Without dead ends: 3010 [2021-11-25 18:22:23,883 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:22:23,886 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 13 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:23,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 2206 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2021-11-25 18:22:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2933. [2021-11-25 18:22:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2065 states have (on average 1.510411622276029) internal successors, (3119), 2198 states have internal predecessors, (3119), 669 states have call successors, (669), 170 states have call predecessors, (669), 198 states have return successors, (833), 660 states have call predecessors, (833), 664 states have call successors, (833) [2021-11-25 18:22:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4621 transitions. [2021-11-25 18:22:24,166 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4621 transitions. Word has length 99 [2021-11-25 18:22:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:24,167 INFO L470 AbstractCegarLoop]: Abstraction has 2933 states and 4621 transitions. [2021-11-25 18:22:24,167 INFO L471 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) [2021-11-25 18:22:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4621 transitions. [2021-11-25 18:22:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-25 18:22:24,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:24,176 INFO L514 BasicCegarLoop]: 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, 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] [2021-11-25 18:22:24,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:24,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:24,402 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:24,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:24,402 INFO L85 PathProgramCache]: Analyzing trace with hash -997829384, now seen corresponding path program 1 times [2021-11-25 18:22:24,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:24,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832400302] [2021-11-25 18:22:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:24,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 18:22:24,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832400302] [2021-11-25 18:22:24,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832400302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873318999] [2021-11-25 18:22:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:24,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:24,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:24,551 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:24,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:22:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:24,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1862 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:22:24,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 18:22:25,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:25,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873318999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:25,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:25,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-25 18:22:25,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59367230] [2021-11-25 18:22:25,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:25,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:25,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:25,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:25,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:22:25,129 INFO L87 Difference]: Start difference. First operand 2933 states and 4621 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 18:22:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:25,421 INFO L93 Difference]: Finished difference Result 6625 states and 10624 transitions. [2021-11-25 18:22:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:25,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 117 [2021-11-25 18:22:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:25,457 INFO L225 Difference]: With dead ends: 6625 [2021-11-25 18:22:25,457 INFO L226 Difference]: Without dead ends: 3704 [2021-11-25 18:22:25,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:22:25,481 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 529 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:25,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 1282 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-11-25 18:22:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2021-11-25 18:22:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.512412723041117) internal successors, (3899), 2745 states have internal predecessors, (3899), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2021-11-25 18:22:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5761 transitions. [2021-11-25 18:22:25,799 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5761 transitions. Word has length 117 [2021-11-25 18:22:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:25,800 INFO L470 AbstractCegarLoop]: Abstraction has 3648 states and 5761 transitions. [2021-11-25 18:22:25,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 18:22:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5761 transitions. [2021-11-25 18:22:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-25 18:22:25,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:25,813 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:22:25,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:26,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:22:26,042 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:26,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:26,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1659991831, now seen corresponding path program 1 times [2021-11-25 18:22:26,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:26,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321700092] [2021-11-25 18:22:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:26,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 18:22:26,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:26,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321700092] [2021-11-25 18:22:26,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321700092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:26,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879700642] [2021-11-25 18:22:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:26,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:26,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:26,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:22:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:26,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:22:26,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:22:26,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879700642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:26,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:26,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-25 18:22:26,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61451207] [2021-11-25 18:22:26,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:26,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:22:26,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:22:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:22:26,703 INFO L87 Difference]: Start difference. First operand 3648 states and 5761 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) [2021-11-25 18:22:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:27,087 INFO L93 Difference]: Finished difference Result 7340 states and 11753 transitions. [2021-11-25 18:22:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:22:27,088 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 [2021-11-25 18:22:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:27,121 INFO L225 Difference]: With dead ends: 7340 [2021-11-25 18:22:27,121 INFO L226 Difference]: Without dead ends: 3704 [2021-11-25 18:22:27,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:22:27,144 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 459 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:27,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1492 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-11-25 18:22:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 3648. [2021-11-25 18:22:27,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 2578 states have (on average 1.5096974398758727) internal successors, (3892), 2745 states have internal predecessors, (3892), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2021-11-25 18:22:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5754 transitions. [2021-11-25 18:22:27,385 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5754 transitions. Word has length 118 [2021-11-25 18:22:27,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:27,386 INFO L470 AbstractCegarLoop]: Abstraction has 3648 states and 5754 transitions. [2021-11-25 18:22:27,386 INFO L471 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) [2021-11-25 18:22:27,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5754 transitions. [2021-11-25 18:22:27,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-25 18:22:27,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:27,395 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:22:27,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:27,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:27,618 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash 774985050, now seen corresponding path program 1 times [2021-11-25 18:22:27,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:27,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210046351] [2021-11-25 18:22:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:27,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 18:22:27,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:27,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210046351] [2021-11-25 18:22:27,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210046351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256462536] [2021-11-25 18:22:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:27,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:27,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:27,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:27,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:22:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:28,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:22:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:22:28,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:28,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256462536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:28,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:28,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-11-25 18:22:28,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461151636] [2021-11-25 18:22:28,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:28,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:22:28,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:28,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:22:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:22:28,456 INFO L87 Difference]: Start difference. First operand 3648 states and 5754 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) [2021-11-25 18:22:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:31,745 INFO L93 Difference]: Finished difference Result 8197 states and 13092 transitions. [2021-11-25 18:22:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:22:31,746 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 [2021-11-25 18:22:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:31,793 INFO L225 Difference]: With dead ends: 8197 [2021-11-25 18:22:31,794 INFO L226 Difference]: Without dead ends: 4435 [2021-11-25 18:22:31,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:22:31,813 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 1587 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 3369 mSolverCounterSat, 1060 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1618 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 4429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1060 IncrementalHoareTripleChecker+Valid, 3369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:31,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1618 Valid, 1789 Invalid, 4429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1060 Valid, 3369 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 18:22:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-11-25 18:22:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3643. [2021-11-25 18:22:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2573 states have (on average 1.5102992615623785) internal successors, (3886), 2740 states have internal predecessors, (3886), 825 states have call successors, (825), 207 states have call predecessors, (825), 244 states have return successors, (1037), 815 states have call predecessors, (1037), 820 states have call successors, (1037) [2021-11-25 18:22:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5748 transitions. [2021-11-25 18:22:32,156 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5748 transitions. Word has length 117 [2021-11-25 18:22:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:32,156 INFO L470 AbstractCegarLoop]: Abstraction has 3643 states and 5748 transitions. [2021-11-25 18:22:32,156 INFO L471 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) [2021-11-25 18:22:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5748 transitions. [2021-11-25 18:22:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 18:22:32,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:32,167 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:22:32,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:32,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:32,382 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:32,382 INFO L85 PathProgramCache]: Analyzing trace with hash -834393372, now seen corresponding path program 1 times [2021-11-25 18:22:32,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:32,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184443276] [2021-11-25 18:22:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:32,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 18:22:32,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:32,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184443276] [2021-11-25 18:22:32,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184443276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:32,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420855848] [2021-11-25 18:22:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:32,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:32,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:32,515 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:32,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:22:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:32,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:22:32,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:22:33,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:33,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420855848] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:33,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:33,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-25 18:22:33,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386550087] [2021-11-25 18:22:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:33,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:33,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:33,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:22:33,071 INFO L87 Difference]: Start difference. First operand 3643 states and 5748 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) [2021-11-25 18:22:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:34,132 INFO L93 Difference]: Finished difference Result 7538 states and 12125 transitions. [2021-11-25 18:22:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:22:34,133 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 [2021-11-25 18:22:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:34,175 INFO L225 Difference]: With dead ends: 7538 [2021-11-25 18:22:34,175 INFO L226 Difference]: Without dead ends: 4514 [2021-11-25 18:22:34,257 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:22:34,257 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 673 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:34,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1172 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:22:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-11-25 18:22:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 4401. [2021-11-25 18:22:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 3011 states have (on average 1.4985054799070077) internal successors, (4512), 3226 states have internal predecessors, (4512), 1081 states have call successors, (1081), 279 states have call predecessors, (1081), 308 states have return successors, (1351), 1063 states have call predecessors, (1351), 1074 states have call successors, (1351) [2021-11-25 18:22:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 6944 transitions. [2021-11-25 18:22:34,572 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 6944 transitions. Word has length 123 [2021-11-25 18:22:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:34,575 INFO L470 AbstractCegarLoop]: Abstraction has 4401 states and 6944 transitions. [2021-11-25 18:22:34,575 INFO L471 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) [2021-11-25 18:22:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 6944 transitions. [2021-11-25 18:22:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-25 18:22:34,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:34,585 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:22:34,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:34,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:22:34,805 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:34,806 INFO L85 PathProgramCache]: Analyzing trace with hash 357934980, now seen corresponding path program 1 times [2021-11-25 18:22:34,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:34,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069732564] [2021-11-25 18:22:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:34,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 18:22:34,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:34,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069732564] [2021-11-25 18:22:34,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069732564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:34,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232067826] [2021-11-25 18:22:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:34,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:34,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:34,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:34,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:22:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:22:35,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:22:35,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:35,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232067826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:35,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:35,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-25 18:22:35,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596411885] [2021-11-25 18:22:35,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:35,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:35,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:35,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:35,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:22:35,444 INFO L87 Difference]: Start difference. First operand 4401 states and 6944 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) [2021-11-25 18:22:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:36,649 INFO L93 Difference]: Finished difference Result 11083 states and 17801 transitions. [2021-11-25 18:22:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:22:36,650 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 [2021-11-25 18:22:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:36,695 INFO L225 Difference]: With dead ends: 11083 [2021-11-25 18:22:36,695 INFO L226 Difference]: Without dead ends: 7279 [2021-11-25 18:22:36,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:22:36,722 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 551 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:36,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 1609 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:22:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2021-11-25 18:22:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2021-11-25 18:22:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7261 states, 4887 states have (on average 1.4923265807243709) internal successors, (7293), 5268 states have internal predecessors, (7293), 1869 states have call successors, (1869), 473 states have call predecessors, (1869), 504 states have return successors, (2297), 1831 states have call predecessors, (2297), 1858 states have call successors, (2297) [2021-11-25 18:22:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 11459 transitions. [2021-11-25 18:22:37,378 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 11459 transitions. Word has length 124 [2021-11-25 18:22:37,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:37,379 INFO L470 AbstractCegarLoop]: Abstraction has 7261 states and 11459 transitions. [2021-11-25 18:22:37,379 INFO L471 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) [2021-11-25 18:22:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 11459 transitions. [2021-11-25 18:22:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 18:22:37,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:37,394 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:22:37,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:37,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:37,622 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:37,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:37,622 INFO L85 PathProgramCache]: Analyzing trace with hash 530631708, now seen corresponding path program 1 times [2021-11-25 18:22:37,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:37,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394885460] [2021-11-25 18:22:37,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:37,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 18:22:37,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:37,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394885460] [2021-11-25 18:22:37,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394885460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:37,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826375970] [2021-11-25 18:22:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:37,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:37,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:37,749 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:37,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:22:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:38,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:22:38,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:22:38,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:22:38,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826375970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:38,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:22:38,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2021-11-25 18:22:38,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432957050] [2021-11-25 18:22:38,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:38,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:22:38,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:38,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:22:38,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:22:38,351 INFO L87 Difference]: Start difference. First operand 7261 states and 11459 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) [2021-11-25 18:22:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:39,793 INFO L93 Difference]: Finished difference Result 18186 states and 29039 transitions. [2021-11-25 18:22:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:22:39,794 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 [2021-11-25 18:22:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:39,876 INFO L225 Difference]: With dead ends: 18186 [2021-11-25 18:22:39,876 INFO L226 Difference]: Without dead ends: 11544 [2021-11-25 18:22:39,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:22:39,938 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 653 mSDsluCounter, 3759 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:39,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 4248 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:22:39,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11544 states. [2021-11-25 18:22:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11544 to 10469. [2021-11-25 18:22:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10469 states, 6995 states have (on average 1.4932094353109364) internal successors, (10445), 7562 states have internal predecessors, (10445), 2765 states have call successors, (2765), 667 states have call predecessors, (2765), 708 states have return successors, (3474), 2719 states have call predecessors, (3474), 2748 states have call successors, (3474) [2021-11-25 18:22:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10469 states to 10469 states and 16684 transitions. [2021-11-25 18:22:40,837 INFO L78 Accepts]: Start accepts. Automaton has 10469 states and 16684 transitions. Word has length 125 [2021-11-25 18:22:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:40,837 INFO L470 AbstractCegarLoop]: Abstraction has 10469 states and 16684 transitions. [2021-11-25 18:22:40,838 INFO L471 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) [2021-11-25 18:22:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 10469 states and 16684 transitions. [2021-11-25 18:22:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-25 18:22:40,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:40,851 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:22:40,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:41,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:22:41,074 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:22:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:41,074 INFO L85 PathProgramCache]: Analyzing trace with hash 388142882, now seen corresponding path program 1 times [2021-11-25 18:22:41,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:41,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705121360] [2021-11-25 18:22:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:41,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 18:22:41,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705121360] [2021-11-25 18:22:41,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705121360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466472346] [2021-11-25 18:22:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:41,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:41,210 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:41,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:22:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 18:22:41,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 55 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:22:41,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 18:22:42,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466472346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:42,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76940598] [2021-11-25 18:22:42,227 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2021-11-25 18:22:42,227 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:42,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:42,238 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:42,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:50,485 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 677 for LOIs [2021-11-25 18:23:25,294 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 29 for LOIs [2021-11-25 18:23:25,314 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2021-11-25 18:23:25,560 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 36 for LOIs [2021-11-25 18:23:25,563 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 448 for LOIs [2021-11-25 18:23:25,730 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 81 for LOIs [2021-11-25 18:23:25,750 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2021-11-25 18:23:27,542 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2021-11-25 18:23:27,702 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 39 for LOIs [2021-11-25 18:23:27,716 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 30 for LOIs [2021-11-25 18:23:27,721 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2021-11-25 18:23:30,920 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-25 18:23:31,431 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-25 18:23:31,563 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:23:55,749 WARN L227 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:24:01,265 WARN L227 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:24:22,489 WARN L227 SmtUtils]: Spent 9.99s on a formula simplification. DAG size of input: 677 DAG size of output: 583 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:24:33,726 WARN L227 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 633 DAG size of output: 609 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:24:46,897 WARN L227 SmtUtils]: Spent 11.94s on a formula simplification. DAG size of input: 668 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:25:00,917 WARN L227 SmtUtils]: Spent 13.00s on a formula simplification. DAG size of input: 668 DAG size of output: 616 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:25:16,242 WARN L227 SmtUtils]: Spent 13.11s on a formula simplification. DAG size of input: 669 DAG size of output: 612 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:25:32,456 WARN L227 SmtUtils]: Spent 14.06s on a formula simplification. DAG size of input: 680 DAG size of output: 616 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:25:45,718 WARN L227 SmtUtils]: Spent 11.92s on a formula simplification. DAG size of input: 667 DAG size of output: 609 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:25:52,139 WARN L227 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 668 DAG size of output: 579 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:26:21,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '192521#(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|) (= ~cleanupTimeShifts~0 12) (= ~currentFloorID~0 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:26:21,032 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:21,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:21,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-11-25 18:26:21,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036311316] [2021-11-25 18:26:21,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:21,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 18:26:21,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 18:26:21,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=5514, Unknown=0, NotChecked=0, Total=6006 [2021-11-25 18:26:21,037 INFO L87 Difference]: Start difference. First operand 10469 states and 16684 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) [2021-11-25 18:26:38,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:38,583 INFO L93 Difference]: Finished difference Result 51622 states and 88186 transitions. [2021-11-25 18:26:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-25 18:26:38,589 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 [2021-11-25 18:26:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:39,034 INFO L225 Difference]: With dead ends: 51622 [2021-11-25 18:26:39,035 INFO L226 Difference]: Without dead ends: 36010 [2021-11-25 18:26:39,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 331 SyntacticMatches, 14 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11734 ImplicationChecksByTransitivity, 172.1s TimeCoverageRelationStatistics Valid=1590, Invalid=26802, Unknown=0, NotChecked=0, Total=28392 [2021-11-25 18:26:39,229 INFO L933 BasicCegarLoop]: 1293 mSDtfsCounter, 7916 mSDsluCounter, 8087 mSDsCounter, 0 mSdLazyCounter, 19294 mSolverCounterSat, 5726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8084 SdHoareTripleChecker+Valid, 8952 SdHoareTripleChecker+Invalid, 25020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5726 IncrementalHoareTripleChecker+Valid, 19294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:39,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8084 Valid, 8952 Invalid, 25020 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5726 Valid, 19294 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2021-11-25 18:26:39,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36010 states. [2021-11-25 18:26:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36010 to 27876. [2021-11-25 18:26:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27876 states, 18609 states have (on average 1.4911064538664087) internal successors, (27748), 20488 states have internal predecessors, (27748), 7585 states have call successors, (7585), 1491 states have call predecessors, (7585), 1681 states have return successors, (10918), 6897 states have call predecessors, (10918), 7557 states have call successors, (10918) [2021-11-25 18:26:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27876 states to 27876 states and 46251 transitions. [2021-11-25 18:26:42,139 INFO L78 Accepts]: Start accepts. Automaton has 27876 states and 46251 transitions. Word has length 127 [2021-11-25 18:26:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:42,140 INFO L470 AbstractCegarLoop]: Abstraction has 27876 states and 46251 transitions. [2021-11-25 18:26:42,140 INFO L471 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) [2021-11-25 18:26:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 27876 states and 46251 transitions. [2021-11-25 18:26:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-25 18:26:42,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:42,158 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:26:42,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:42,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:26:42,382 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:42,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:42,382 INFO L85 PathProgramCache]: Analyzing trace with hash -858915501, now seen corresponding path program 1 times [2021-11-25 18:26:42,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:42,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281504092] [2021-11-25 18:26:42,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:42,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:26:42,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:42,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281504092] [2021-11-25 18:26:42,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281504092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:42,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842992806] [2021-11-25 18:26:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:42,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:42,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:42,513 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:42,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:26:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:26:42,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 18:26:43,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:26:43,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842992806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:43,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:26:43,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-25 18:26:43,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922838320] [2021-11-25 18:26:43,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:43,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:26:43,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:26:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:26:43,049 INFO L87 Difference]: Start difference. First operand 27876 states and 46251 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) [2021-11-25 18:26:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:45,069 INFO L93 Difference]: Finished difference Result 56544 states and 95557 transitions. [2021-11-25 18:26:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:26:45,070 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 [2021-11-25 18:26:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:45,306 INFO L225 Difference]: With dead ends: 56544 [2021-11-25 18:26:45,306 INFO L226 Difference]: Without dead ends: 26613 [2021-11-25 18:26:45,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:26:45,786 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 177 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:45,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1554 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:26:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26613 states. [2021-11-25 18:26:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26613 to 26591. [2021-11-25 18:26:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26591 states, 17541 states have (on average 1.4765406761302091) internal successors, (25900), 19402 states have internal predecessors, (25900), 7409 states have call successors, (7409), 1467 states have call predecessors, (7409), 1640 states have return successors, (10662), 6722 states have call predecessors, (10662), 7381 states have call successors, (10662) [2021-11-25 18:26:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26591 states to 26591 states and 43971 transitions. [2021-11-25 18:26:47,953 INFO L78 Accepts]: Start accepts. Automaton has 26591 states and 43971 transitions. Word has length 136 [2021-11-25 18:26:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:47,954 INFO L470 AbstractCegarLoop]: Abstraction has 26591 states and 43971 transitions. [2021-11-25 18:26:47,954 INFO L471 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) [2021-11-25 18:26:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 26591 states and 43971 transitions. [2021-11-25 18:26:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-25 18:26:47,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:47,984 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1] [2021-11-25 18:26:48,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:26:48,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:26:48,198 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1444136859, now seen corresponding path program 1 times [2021-11-25 18:26:48,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:48,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660167150] [2021-11-25 18:26:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:48,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:26:48,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660167150] [2021-11-25 18:26:48,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660167150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:26:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420106170] [2021-11-25 18:26:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:48,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:26:48,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:48,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:26:48,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 18:26:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:26:48,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:26:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 18:26:49,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-25 18:26:49,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420106170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:26:49,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595577012] [2021-11-25 18:26:49,713 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2021-11-25 18:26:49,713 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:49,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:26:49,714 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:26:49,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:53,552 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2021-11-25 18:26:58,115 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 491 for LOIs [2021-11-25 18:26:58,394 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2021-11-25 18:27:00,270 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2021-11-25 18:27:00,431 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 438 for LOIs [2021-11-25 18:27:00,503 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2021-11-25 18:27:03,751 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-25 18:27:04,252 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-25 18:27:04,385 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:27:28,808 WARN L227 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:27:34,658 WARN L227 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:16,861 WARN L227 SmtUtils]: Spent 9.77s on a formula simplification. DAG size of input: 491 DAG size of output: 438 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:28,136 WARN L227 SmtUtils]: Spent 10.23s on a formula simplification. DAG size of input: 527 DAG size of output: 446 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:34,139 WARN L227 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 622 DAG size of output: 591 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:49,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [595577012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:28:49,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:28:49,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [7, 6, 7] total 39 [2021-11-25 18:28:49,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111003434] [2021-11-25 18:28:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:28:49,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:28:49,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:28:49,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 18:28:49,362 INFO L87 Difference]: Start difference. First operand 26591 states and 43971 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-25 18:29:13,816 WARN L227 SmtUtils]: Spent 9.62s on a formula simplification. DAG size of input: 589 DAG size of output: 572 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:23,723 WARN L227 SmtUtils]: Spent 9.70s on a formula simplification. DAG size of input: 595 DAG size of output: 578 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:29:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:44,288 INFO L93 Difference]: Finished difference Result 53276 states and 87641 transitions. [2021-11-25 18:29:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 18:29:44,289 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2021-11-25 18:29:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:44,496 INFO L225 Difference]: With dead ends: 53276 [2021-11-25 18:29:44,496 INFO L226 Difference]: Without dead ends: 26713 [2021-11-25 18:29:44,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 383 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 138.1s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 18:29:44,678 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 167 mSDsluCounter, 3920 mSDsCounter, 0 mSdLazyCounter, 5047 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 4448 SdHoareTripleChecker+Invalid, 5102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:44,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 4448 Invalid, 5102 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [55 Valid, 5047 Invalid, 0 Unknown, 0 Unchecked, 20.3s Time] [2021-11-25 18:29:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26713 states. [2021-11-25 18:29:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26713 to 26634. [2021-11-25 18:29:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26634 states, 17574 states have (on average 1.475873449413907) internal successors, (25937), 19434 states have internal predecessors, (25937), 7415 states have call successors, (7415), 1472 states have call predecessors, (7415), 1644 states have return successors, (10668), 6728 states have call predecessors, (10668), 7387 states have call successors, (10668) [2021-11-25 18:29:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26634 states to 26634 states and 44020 transitions. [2021-11-25 18:29:46,531 INFO L78 Accepts]: Start accepts. Automaton has 26634 states and 44020 transitions. Word has length 140 [2021-11-25 18:29:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:46,531 INFO L470 AbstractCegarLoop]: Abstraction has 26634 states and 44020 transitions. [2021-11-25 18:29:46,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-25 18:29:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 26634 states and 44020 transitions. [2021-11-25 18:29:46,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-25 18:29:46,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:46,552 INFO L514 BasicCegarLoop]: 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] [2021-11-25 18:29:46,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:46,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:29:46,766 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:29:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash 493869230, now seen corresponding path program 1 times [2021-11-25 18:29:46,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:46,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046515821] [2021-11-25 18:29:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:46,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-25 18:29:47,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046515821] [2021-11-25 18:29:47,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046515821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624342412] [2021-11-25 18:29:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:47,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:47,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:47,130 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:47,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 18:29:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:29:47,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 18:29:47,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:29:47,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624342412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:29:47,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:29:47,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2021-11-25 18:29:47,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72403518] [2021-11-25 18:29:47,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:29:47,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:29:47,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:29:47,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:29:47,763 INFO L87 Difference]: Start difference. First operand 26634 states and 44020 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) [2021-11-25 18:29:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:50,848 INFO L93 Difference]: Finished difference Result 51319 states and 85476 transitions. [2021-11-25 18:29:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:29:50,849 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 [2021-11-25 18:29:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:51,036 INFO L225 Difference]: With dead ends: 51319 [2021-11-25 18:29:51,036 INFO L226 Difference]: Without dead ends: 25848 [2021-11-25 18:29:51,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:29:51,241 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 654 mSDsluCounter, 3420 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 4110 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:51,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 4110 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:29:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25848 states. [2021-11-25 18:29:52,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25848 to 24852. [2021-11-25 18:29:52,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24852 states, 16415 states have (on average 1.4768199817240328) internal successors, (24242), 18114 states have internal predecessors, (24242), 6818 states have call successors, (6818), 1455 states have call predecessors, (6818), 1618 states have return successors, (9665), 6197 states have call predecessors, (9665), 6782 states have call successors, (9665) [2021-11-25 18:29:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24852 states to 24852 states and 40725 transitions. [2021-11-25 18:29:53,284 INFO L78 Accepts]: Start accepts. Automaton has 24852 states and 40725 transitions. Word has length 139 [2021-11-25 18:29:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:53,284 INFO L470 AbstractCegarLoop]: Abstraction has 24852 states and 40725 transitions. [2021-11-25 18:29:53,284 INFO L471 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) [2021-11-25 18:29:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 24852 states and 40725 transitions. [2021-11-25 18:29:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 18:29:53,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:53,303 INFO L514 BasicCegarLoop]: 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, 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] [2021-11-25 18:29:53,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:53,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:53,518 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:29:53,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash 549565040, now seen corresponding path program 1 times [2021-11-25 18:29:53,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:53,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094100819] [2021-11-25 18:29:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:53,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-25 18:29:54,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094100819] [2021-11-25 18:29:54,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094100819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101940246] [2021-11-25 18:29:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:54,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:54,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:54,062 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:54,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 18:29:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:54,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:29:54,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-25 18:29:54,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:29:54,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101940246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:29:54,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:29:54,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 19 [2021-11-25 18:29:54,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914300900] [2021-11-25 18:29:54,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:29:54,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:29:54,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:54,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:29:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:29:54,647 INFO L87 Difference]: Start difference. First operand 24852 states and 40725 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2021-11-25 18:29:56,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:29:56,225 INFO L93 Difference]: Finished difference Result 45177 states and 75769 transitions. [2021-11-25 18:29:56,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:29:56,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 142 [2021-11-25 18:29:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:29:56,366 INFO L225 Difference]: With dead ends: 45177 [2021-11-25 18:29:56,366 INFO L226 Difference]: Without dead ends: 21470 [2021-11-25 18:29:56,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:29:56,518 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 100 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:29:56,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1284 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:29:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21470 states. [2021-11-25 18:29:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21470 to 21311. [2021-11-25 18:29:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 14171 states have (on average 1.4632700585703198) internal successors, (20736), 15530 states have internal predecessors, (20736), 5707 states have call successors, (5707), 1289 states have call predecessors, (5707), 1432 states have return successors, (8234), 5242 states have call predecessors, (8234), 5671 states have call successors, (8234) [2021-11-25 18:29:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 34677 transitions. [2021-11-25 18:29:57,991 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 34677 transitions. Word has length 142 [2021-11-25 18:29:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:29:57,991 INFO L470 AbstractCegarLoop]: Abstraction has 21311 states and 34677 transitions. [2021-11-25 18:29:57,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2021-11-25 18:29:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 34677 transitions. [2021-11-25 18:29:58,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 18:29:58,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:29:58,000 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:29:58,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:29:58,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:58,202 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:29:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:29:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1563552564, now seen corresponding path program 1 times [2021-11-25 18:29:58,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:29:58,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832259803] [2021-11-25 18:29:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:58,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:29:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-25 18:29:58,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:29:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832259803] [2021-11-25 18:29:58,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832259803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:29:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207589239] [2021-11-25 18:29:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:29:58,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:29:58,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:29:58,473 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:29:58,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 18:29:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:29:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 18:29:58,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:29:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 18:29:59,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:29:59,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207589239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:29:59,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:29:59,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2021-11-25 18:29:59,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374824332] [2021-11-25 18:29:59,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:29:59,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:29:59,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:29:59,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:29:59,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:29:59,224 INFO L87 Difference]: Start difference. First operand 21311 states and 34677 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 18:30:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:01,735 INFO L93 Difference]: Finished difference Result 41441 states and 67385 transitions. [2021-11-25 18:30:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:30:01,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2021-11-25 18:30:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:01,873 INFO L225 Difference]: With dead ends: 41441 [2021-11-25 18:30:01,873 INFO L226 Difference]: Without dead ends: 21379 [2021-11-25 18:30:01,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:30:01,989 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 550 mSDsluCounter, 4232 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 4893 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:01,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 4893 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1753 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 18:30:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21379 states. [2021-11-25 18:30:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21379 to 21355. [2021-11-25 18:30:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21355 states, 14215 states have (on average 1.4618360886387618) internal successors, (20780), 15552 states have internal predecessors, (20780), 5707 states have call successors, (5707), 1311 states have call predecessors, (5707), 1432 states have return successors, (8182), 5242 states have call predecessors, (8182), 5671 states have call successors, (8182) [2021-11-25 18:30:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21355 states to 21355 states and 34669 transitions. [2021-11-25 18:30:03,576 INFO L78 Accepts]: Start accepts. Automaton has 21355 states and 34669 transitions. Word has length 142 [2021-11-25 18:30:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:03,577 INFO L470 AbstractCegarLoop]: Abstraction has 21355 states and 34669 transitions. [2021-11-25 18:30:03,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-25 18:30:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 21355 states and 34669 transitions. [2021-11-25 18:30:03,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 18:30:03,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:03,591 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:03,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:03,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 18:30:03,796 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:03,796 INFO L85 PathProgramCache]: Analyzing trace with hash -251274282, now seen corresponding path program 1 times [2021-11-25 18:30:03,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:03,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650682403] [2021-11-25 18:30:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:03,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:30:03,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:03,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650682403] [2021-11-25 18:30:03,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650682403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:30:03,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:30:03,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:30:03,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495934613] [2021-11-25 18:30:03,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:30:03,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:30:03,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:30:03,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:30:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:30:03,893 INFO L87 Difference]: Start difference. First operand 21355 states and 34669 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 18:30:05,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:05,572 INFO L93 Difference]: Finished difference Result 41924 states and 69541 transitions. [2021-11-25 18:30:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:30:05,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2021-11-25 18:30:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:05,687 INFO L225 Difference]: With dead ends: 41924 [2021-11-25 18:30:05,687 INFO L226 Difference]: Without dead ends: 21660 [2021-11-25 18:30:05,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:30:05,834 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 13 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:05,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 2201 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:30:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21660 states. [2021-11-25 18:30:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21660 to 21458. [2021-11-25 18:30:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21458 states, 14295 states have (on average 1.456593214410633) internal successors, (20822), 15661 states have internal predecessors, (20822), 5661 states have call successors, (5661), 1303 states have call predecessors, (5661), 1501 states have return successors, (8328), 5244 states have call predecessors, (8328), 5625 states have call successors, (8328) [2021-11-25 18:30:07,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21458 states to 21458 states and 34811 transitions. [2021-11-25 18:30:07,334 INFO L78 Accepts]: Start accepts. Automaton has 21458 states and 34811 transitions. Word has length 146 [2021-11-25 18:30:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:07,334 INFO L470 AbstractCegarLoop]: Abstraction has 21458 states and 34811 transitions. [2021-11-25 18:30:07,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 18:30:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 21458 states and 34811 transitions. [2021-11-25 18:30:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-25 18:30:07,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:07,341 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:30:07,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 18:30:07,341 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:30:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1668564539, now seen corresponding path program 1 times [2021-11-25 18:30:07,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:07,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185618205] [2021-11-25 18:30:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:07,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 18:30:07,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:30:07,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185618205] [2021-11-25 18:30:07,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185618205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:30:07,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676485980] [2021-11-25 18:30:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:07,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:07,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:30:07,606 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:30:07,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 18:30:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:30:07,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1957 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 18:30:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:30:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 18:30:08,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:30:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-25 18:30:08,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676485980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:30:08,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911976384] [2021-11-25 18:30:08,961 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2021-11-25 18:30:08,961 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:30:08,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:30:08,962 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:30:08,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:30:14,987 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 663 for LOIs [2021-11-25 18:30:22,446 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 26 for LOIs [2021-11-25 18:30:22,449 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 39 for LOIs [2021-11-25 18:30:22,592 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 61 for LOIs [2021-11-25 18:30:22,612 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 48 for LOIs [2021-11-25 18:30:22,626 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2021-11-25 18:30:24,466 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2021-11-25 18:30:24,651 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 36 for LOIs [2021-11-25 18:30:24,725 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 54 for LOIs [2021-11-25 18:30:24,735 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 71 for LOIs [2021-11-25 18:30:24,747 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2021-11-25 18:30:28,121 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2021-11-25 18:30:28,642 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2021-11-25 18:30:28,776 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:30:54,586 WARN L227 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:31:00,276 WARN L227 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:31:17,516 WARN L227 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 663 DAG size of output: 565 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:31:23,763 WARN L227 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 662 DAG size of output: 570 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:31:44,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '919603#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2021-11-25 18:31:44,114 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:31:44,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:31:44,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 10] total 29 [2021-11-25 18:31:44,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845386045] [2021-11-25 18:31:44,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:31:44,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 18:31:44,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:31:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 18:31:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=10918, Unknown=0, NotChecked=0, Total=11772 [2021-11-25 18:31:44,120 INFO L87 Difference]: Start difference. First operand 21458 states and 34811 transitions. Second operand has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2021-11-25 18:32:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:01,481 INFO L93 Difference]: Finished difference Result 62377 states and 108382 transitions. [2021-11-25 18:32:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-25 18:32:01,481 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) Word has length 146 [2021-11-25 18:32:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:01,789 INFO L225 Difference]: With dead ends: 62377 [2021-11-25 18:32:01,789 INFO L226 Difference]: Without dead ends: 41836 [2021-11-25 18:32:02,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 377 SyntacticMatches, 5 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16724 ImplicationChecksByTransitivity, 78.2s TimeCoverageRelationStatistics Valid=3338, Invalid=37264, Unknown=0, NotChecked=0, Total=40602 [2021-11-25 18:32:02,015 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 7830 mSDsluCounter, 6508 mSDsCounter, 0 mSdLazyCounter, 18792 mSolverCounterSat, 6065 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7830 SdHoareTripleChecker+Valid, 6682 SdHoareTripleChecker+Invalid, 24857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6065 IncrementalHoareTripleChecker+Valid, 18792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:02,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7830 Valid, 6682 Invalid, 24857 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6065 Valid, 18792 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2021-11-25 18:32:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41836 states. [2021-11-25 18:32:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41836 to 37374. [2021-11-25 18:32:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37374 states, 24981 states have (on average 1.4370121292182059) internal successors, (35898), 27287 states have internal predecessors, (35898), 9646 states have call successors, (9646), 2376 states have call predecessors, (9646), 2746 states have return successors, (16029), 8985 states have call predecessors, (16029), 9588 states have call successors, (16029) [2021-11-25 18:32:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37374 states to 37374 states and 61573 transitions. [2021-11-25 18:32:04,602 INFO L78 Accepts]: Start accepts. Automaton has 37374 states and 61573 transitions. Word has length 146 [2021-11-25 18:32:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:32:04,602 INFO L470 AbstractCegarLoop]: Abstraction has 37374 states and 61573 transitions. [2021-11-25 18:32:04,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2021-11-25 18:32:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 37374 states and 61573 transitions. [2021-11-25 18:32:04,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-25 18:32:04,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:04,607 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:32:04,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:32:04,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:04,808 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:32:04,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1588277853, now seen corresponding path program 1 times [2021-11-25 18:32:04,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:04,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44864863] [2021-11-25 18:32:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:04,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:05,186 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-25 18:32:05,186 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:32:05,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44864863] [2021-11-25 18:32:05,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44864863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:32:05,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988391006] [2021-11-25 18:32:05,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:05,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:05,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:32:05,202 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:32:05,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 18:32:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:32:05,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:32:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-25 18:32:05,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:32:05,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988391006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:32:05,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:32:05,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2021-11-25 18:32:05,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609330161] [2021-11-25 18:32:05,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:32:05,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:32:05,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:32:05,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:32:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:32:05,735 INFO L87 Difference]: Start difference. First operand 37374 states and 61573 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 18:32:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:08,746 INFO L93 Difference]: Finished difference Result 74035 states and 125345 transitions. [2021-11-25 18:32:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:32:08,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 156 [2021-11-25 18:32:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:08,947 INFO L225 Difference]: With dead ends: 74035 [2021-11-25 18:32:08,947 INFO L226 Difference]: Without dead ends: 37760 [2021-11-25 18:32:09,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:32:09,454 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 462 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 2728 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:09,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 2728 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:32:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37760 states. [2021-11-25 18:32:11,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37760 to 37331. [2021-11-25 18:32:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37331 states, 24954 states have (on average 1.4371643824637332) internal successors, (35863), 27258 states have internal predecessors, (35863), 9637 states have call successors, (9637), 2372 states have call predecessors, (9637), 2739 states have return successors, (16000), 8975 states have call predecessors, (16000), 9579 states have call successors, (16000) [2021-11-25 18:32:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37331 states to 37331 states and 61500 transitions. [2021-11-25 18:32:12,326 INFO L78 Accepts]: Start accepts. Automaton has 37331 states and 61500 transitions. Word has length 156 [2021-11-25 18:32:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:32:12,327 INFO L470 AbstractCegarLoop]: Abstraction has 37331 states and 61500 transitions. [2021-11-25 18:32:12,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 18:32:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 37331 states and 61500 transitions. [2021-11-25 18:32:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-25 18:32:12,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:12,333 INFO L514 BasicCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:32:12,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 18:32:12,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:12,550 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:32:12,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1671153345, now seen corresponding path program 1 times [2021-11-25 18:32:12,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:12,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520167575] [2021-11-25 18:32:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:12,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-25 18:32:12,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:32:12,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520167575] [2021-11-25 18:32:12,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520167575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:32:12,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090340518] [2021-11-25 18:32:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:12,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:12,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:32:12,836 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:32:12,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb7d2f3c-86a7-4e71-842d-9d75b19d1fff/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 18:32:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:13,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:32:13,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:32:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 18:32:13,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:32:13,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090340518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:32:13,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:32:13,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [19] total 25 [2021-11-25 18:32:13,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610672969] [2021-11-25 18:32:13,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:32:13,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:32:13,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:32:13,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:32:13,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-11-25 18:32:13,529 INFO L87 Difference]: Start difference. First operand 37331 states and 61500 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 4 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-25 18:32:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:17,437 INFO L93 Difference]: Finished difference Result 72068 states and 120278 transitions. [2021-11-25 18:32:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:32:17,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 4 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 4 states have call successors, (26) Word has length 157 [2021-11-25 18:32:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:17,669 INFO L225 Difference]: With dead ends: 72068 [2021-11-25 18:32:17,669 INFO L226 Difference]: Without dead ends: 35606 [2021-11-25 18:32:18,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-11-25 18:32:18,007 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 731 mSDsluCounter, 2370 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:18,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 2801 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:32:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35606 states. [2021-11-25 18:32:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35606 to 34249. [2021-11-25 18:32:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34249 states, 22837 states have (on average 1.4470377019748653) internal successors, (33046), 24995 states have internal predecessors, (33046), 8998 states have call successors, (8998), 2128 states have call predecessors, (8998), 2413 states have return successors, (13086), 8355 states have call predecessors, (13086), 8943 states have call successors, (13086)