./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P --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 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:06:51,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:06:51,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:06:51,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:06:51,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:06:51,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:06:51,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:06:51,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:06:51,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:06:51,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:06:51,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:06:51,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:06:51,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:06:51,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:06:51,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:06:51,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:06:51,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:06:51,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:06:51,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:06:51,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:06:51,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:06:51,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:06:51,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:06:51,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:06:51,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:06:51,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:06:51,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:06:51,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:06:51,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:06:51,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:06:51,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:06:51,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:06:51,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:06:51,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:06:51,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:06:51,964 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:06:51,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:06:51,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:06:51,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:06:51,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:06:51,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:06:51,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:06:51,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:06:51,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:06:51,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:06:51,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:06:52,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:06:52,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:06:52,000 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:06:52,000 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:06:52,000 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:06:52,001 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:06:52,001 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:06:52,001 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:06:52,001 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:06:52,001 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:06:52,002 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:06:52,002 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:06:52,002 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:06:52,002 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:06:52,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:06:52,003 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:06:52,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:06:52,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:06:52,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:06:52,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:06:52,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:06:52,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:06:52,004 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:06:52,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:06:52,005 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:06:52,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:06:52,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:06:52,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:06:52,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:06:52,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:06:52,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:06:52,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:06:52,006 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:06:52,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:06:52,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:06:52,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:06:52,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:06:52,007 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_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2021-11-21 00:06:52,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:06:52,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:06:52,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:06:52,335 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:06:52,336 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:06:52,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-21 00:06:52,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/data/3f829da18/79a206ce135349bba71a2427367dd509/FLAG2d85df579 [2021-11-21 00:06:53,023 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:06:53,024 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2021-11-21 00:06:53,047 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/data/3f829da18/79a206ce135349bba71a2427367dd509/FLAG2d85df579 [2021-11-21 00:06:53,262 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/data/3f829da18/79a206ce135349bba71a2427367dd509 [2021-11-21 00:06:53,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:06:53,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:06:53,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:06:53,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:06:53,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:06:53,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:06:53" (1/1) ... [2021-11-21 00:06:53,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37282d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:53, skipping insertion in model container [2021-11-21 00:06:53,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:06:53" (1/1) ... [2021-11-21 00:06:53,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:06:53,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:06:53,925 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_3040ef81-4719-4650-a61c-a14c4f3f266d/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-21 00:06:54,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:06:54,016 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:06:54,104 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_3040ef81-4719-4650-a61c-a14c4f3f266d/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2021-11-21 00:06:54,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:06:54,155 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:06:54,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54 WrapperNode [2021-11-21 00:06:54,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:06:54,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:06:54,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:06:54,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:06:54,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,280 INFO L137 Inliner]: procedures = 91, calls = 340, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 862 [2021-11-21 00:06:54,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:06:54,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:06:54,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:06:54,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:06:54,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:06:54,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:06:54,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:06:54,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:06:54,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (1/1) ... [2021-11-21 00:06:54,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:06:54,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:06:54,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:06:54,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:06:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-21 00:06:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-21 00:06:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:06:54,525 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-21 00:06:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-21 00:06:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 00:06:54,526 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 00:06:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2021-11-21 00:06:54,526 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2021-11-21 00:06:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 00:06:54,526 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 00:06:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 00:06:54,527 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 00:06:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-21 00:06:54,527 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-21 00:06:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 00:06:54,527 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 00:06:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 00:06:54,528 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-21 00:06:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 00:06:54,528 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 00:06:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 00:06:54,528 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 00:06:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-21 00:06:54,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-21 00:06:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 00:06:54,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 00:06:54,529 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 00:06:54,530 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 00:06:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 00:06:54,530 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 00:06:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 00:06:54,530 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 00:06:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 00:06:54,531 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 00:06:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 00:06:54,531 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 00:06:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 00:06:54,532 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 00:06:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 00:06:54,532 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 00:06:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:06:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-21 00:06:54,533 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-21 00:06:54,533 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 00:06:54,533 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 00:06:54,534 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 00:06:54,535 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 00:06:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 00:06:54,536 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 00:06:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:06:54,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:06:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 00:06:54,537 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 00:06:54,755 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:06:54,758 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:06:55,765 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:06:56,352 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:06:56,352 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 00:06:56,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:06:56 BoogieIcfgContainer [2021-11-21 00:06:56,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:06:56,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:06:56,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:06:56,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:06:56,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:06:53" (1/3) ... [2021-11-21 00:06:56,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8d146b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:06:56, skipping insertion in model container [2021-11-21 00:06:56,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:06:54" (2/3) ... [2021-11-21 00:06:56,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8d146b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:06:56, skipping insertion in model container [2021-11-21 00:06:56,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:06:56" (3/3) ... [2021-11-21 00:06:56,364 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2021-11-21 00:06:56,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:06:56,369 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:06:56,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:06:56,426 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 [2021-11-21 00:06:56,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:06:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-21 00:06:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 00:06:56,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:56,481 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:06:56,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:06:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1819455823, now seen corresponding path program 1 times [2021-11-21 00:06:56,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:56,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551047217] [2021-11-21 00:06:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:56,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:06:57,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:57,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551047217] [2021-11-21 00:06:57,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551047217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:06:57,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:06:57,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:06:57,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691454940] [2021-11-21 00:06:57,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:06:57,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:06:57,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:06:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:06:57,207 INFO L87 Difference]: Start difference. First operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-21 00:06:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:57,921 INFO L93 Difference]: Finished difference Result 1204 states and 1950 transitions. [2021-11-21 00:06:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:06:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-11-21 00:06:57,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:57,953 INFO L225 Difference]: With dead ends: 1204 [2021-11-21 00:06:57,954 INFO L226 Difference]: Without dead ends: 800 [2021-11-21 00:06:57,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:06:57,975 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 1011 mSDsluCounter, 3841 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 4458 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:57,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 4458 Invalid, 449 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:06:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2021-11-21 00:06:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 784. [2021-11-21 00:06:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 549 states have (on average 1.5810564663023678) internal successors, (868), 576 states have internal predecessors, (868), 188 states have call successors, (188), 47 states have call predecessors, (188), 46 states have return successors, (193), 185 states have call predecessors, (193), 184 states have call successors, (193) [2021-11-21 00:06:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1249 transitions. [2021-11-21 00:06:58,157 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1249 transitions. Word has length 82 [2021-11-21 00:06:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:58,158 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1249 transitions. [2021-11-21 00:06:58,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-21 00:06:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1249 transitions. [2021-11-21 00:06:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 00:06:58,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:58,177 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:06:58,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:06:58,178 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:06:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash 307058614, now seen corresponding path program 1 times [2021-11-21 00:06:58,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:58,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710788337] [2021-11-21 00:06:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:58,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:06:58,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710788337] [2021-11-21 00:06:58,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710788337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:06:58,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:06:58,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:06:58,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576067634] [2021-11-21 00:06:58,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:06:58,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:06:58,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:58,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:06:58,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:06:58,484 INFO L87 Difference]: Start difference. First operand 784 states and 1249 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:06:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:58,752 INFO L93 Difference]: Finished difference Result 1219 states and 1953 transitions. [2021-11-21 00:06:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:06:58,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2021-11-21 00:06:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:58,766 INFO L225 Difference]: With dead ends: 1219 [2021-11-21 00:06:58,766 INFO L226 Difference]: Without dead ends: 829 [2021-11-21 00:06:58,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:06:58,778 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 32 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3786 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:58,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3786 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:06:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-21 00:06:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 798. [2021-11-21 00:06:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 559 states have (on average 1.5706618962432917) internal successors, (878), 586 states have internal predecessors, (878), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 189 states have call predecessors, (203), 184 states have call successors, (203) [2021-11-21 00:06:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1269 transitions. [2021-11-21 00:06:58,888 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1269 transitions. Word has length 86 [2021-11-21 00:06:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:58,889 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1269 transitions. [2021-11-21 00:06:58,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:06:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1269 transitions. [2021-11-21 00:06:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:06:58,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:58,894 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:06:58,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:06:58,895 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:06:58,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash -763691551, now seen corresponding path program 1 times [2021-11-21 00:06:58,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:58,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223950035] [2021-11-21 00:06:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:58,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:06:59,264 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:59,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223950035] [2021-11-21 00:06:59,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223950035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:06:59,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:06:59,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:06:59,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540657954] [2021-11-21 00:06:59,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:06:59,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:06:59,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:59,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:06:59,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:06:59,271 INFO L87 Difference]: Start difference. First operand 798 states and 1269 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 00:07:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:00,962 INFO L93 Difference]: Finished difference Result 3105 states and 5034 transitions. [2021-11-21 00:07:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:07:00,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-11-21 00:07:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:00,992 INFO L225 Difference]: With dead ends: 3105 [2021-11-21 00:07:00,992 INFO L226 Difference]: Without dead ends: 2322 [2021-11-21 00:07:01,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:07:01,014 INFO L933 BasicCegarLoop]: 1241 mSDtfsCounter, 1178 mSDsluCounter, 1931 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:01,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 3074 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 00:07:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-11-21 00:07:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2010. [2021-11-21 00:07:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1459 states have (on average 1.5496915695681974) internal successors, (2261), 1511 states have internal predecessors, (2261), 422 states have call successors, (422), 117 states have call predecessors, (422), 128 states have return successors, (518), 419 states have call predecessors, (518), 414 states have call successors, (518) [2021-11-21 00:07:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3201 transitions. [2021-11-21 00:07:01,279 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3201 transitions. Word has length 87 [2021-11-21 00:07:01,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:01,282 INFO L470 AbstractCegarLoop]: Abstraction has 2010 states and 3201 transitions. [2021-11-21 00:07:01,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 00:07:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3201 transitions. [2021-11-21 00:07:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 00:07:01,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:01,288 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:07:01,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:07:01,290 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash -89730047, now seen corresponding path program 1 times [2021-11-21 00:07:01,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:01,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725372988] [2021-11-21 00:07:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:01,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:07:01,538 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:01,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725372988] [2021-11-21 00:07:01,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725372988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:01,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:07:01,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:07:01,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683804878] [2021-11-21 00:07:01,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:01,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:07:01,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:01,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:07:01,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:07:01,542 INFO L87 Difference]: Start difference. First operand 2010 states and 3201 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:07:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:01,957 INFO L93 Difference]: Finished difference Result 3142 states and 5038 transitions. [2021-11-21 00:07:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:07:01,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2021-11-21 00:07:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:01,994 INFO L225 Difference]: With dead ends: 3142 [2021-11-21 00:07:01,995 INFO L226 Difference]: Without dead ends: 2129 [2021-11-21 00:07:02,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:07:02,014 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3337 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:02,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 3800 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:07:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-11-21 00:07:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 2069. [2021-11-21 00:07:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1502 states have (on average 1.5459387483355527) internal successors, (2322), 1549 states have internal predecessors, (2322), 434 states have call successors, (434), 117 states have call predecessors, (434), 132 states have return successors, (559), 440 states have call predecessors, (559), 426 states have call successors, (559) [2021-11-21 00:07:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3315 transitions. [2021-11-21 00:07:02,210 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3315 transitions. Word has length 87 [2021-11-21 00:07:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:02,211 INFO L470 AbstractCegarLoop]: Abstraction has 2069 states and 3315 transitions. [2021-11-21 00:07:02,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:07:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3315 transitions. [2021-11-21 00:07:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-21 00:07:02,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:02,223 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:07:02,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:07:02,223 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:02,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1303691788, now seen corresponding path program 1 times [2021-11-21 00:07:02,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:02,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675330065] [2021-11-21 00:07:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:02,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:07:02,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675330065] [2021-11-21 00:07:02,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675330065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:02,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:07:02,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:07:02,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35382619] [2021-11-21 00:07:02,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:02,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:07:02,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:07:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:07:02,424 INFO L87 Difference]: Start difference. First operand 2069 states and 3315 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 00:07:03,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:03,822 INFO L93 Difference]: Finished difference Result 4534 states and 7324 transitions. [2021-11-21 00:07:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:07:03,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 93 [2021-11-21 00:07:03,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:03,858 INFO L225 Difference]: With dead ends: 4534 [2021-11-21 00:07:03,858 INFO L226 Difference]: Without dead ends: 3111 [2021-11-21 00:07:03,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:07:03,882 INFO L933 BasicCegarLoop]: 1154 mSDtfsCounter, 1146 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2136 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:03,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 2136 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 00:07:03,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-11-21 00:07:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3070. [2021-11-21 00:07:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 2199 states have (on average 1.4943155979990905) internal successors, (3286), 2271 states have internal predecessors, (3286), 651 states have call successors, (651), 194 states have call predecessors, (651), 219 states have return successors, (882), 662 states have call predecessors, (882), 640 states have call successors, (882) [2021-11-21 00:07:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 4819 transitions. [2021-11-21 00:07:04,140 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 4819 transitions. Word has length 93 [2021-11-21 00:07:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:04,141 INFO L470 AbstractCegarLoop]: Abstraction has 3070 states and 4819 transitions. [2021-11-21 00:07:04,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 00:07:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 4819 transitions. [2021-11-21 00:07:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-21 00:07:04,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:04,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:04,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:07:04,147 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:04,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1043313248, now seen corresponding path program 1 times [2021-11-21 00:07:04,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:04,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349635137] [2021-11-21 00:07:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:04,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:07:04,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349635137] [2021-11-21 00:07:04,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349635137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:04,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:07:04,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:07:04,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243433131] [2021-11-21 00:07:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:04,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:07:04,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:04,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:07:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:07:04,324 INFO L87 Difference]: Start difference. First operand 3070 states and 4819 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:07:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:05,139 INFO L93 Difference]: Finished difference Result 5309 states and 8380 transitions. [2021-11-21 00:07:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:07:05,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 96 [2021-11-21 00:07:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:05,175 INFO L225 Difference]: With dead ends: 5309 [2021-11-21 00:07:05,176 INFO L226 Difference]: Without dead ends: 3111 [2021-11-21 00:07:05,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:07:05,200 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 519 mSDsluCounter, 2132 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:05,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 2839 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:07:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-11-21 00:07:05,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 3086. [2021-11-21 00:07:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2208 states have (on average 1.4923007246376812) internal successors, (3295), 2284 states have internal predecessors, (3295), 655 states have call successors, (655), 197 states have call predecessors, (655), 222 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2021-11-21 00:07:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4843 transitions. [2021-11-21 00:07:05,461 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4843 transitions. Word has length 96 [2021-11-21 00:07:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:05,462 INFO L470 AbstractCegarLoop]: Abstraction has 3086 states and 4843 transitions. [2021-11-21 00:07:05,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 00:07:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4843 transitions. [2021-11-21 00:07:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-21 00:07:05,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:05,467 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:05,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:07:05,468 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:05,469 INFO L85 PathProgramCache]: Analyzing trace with hash -411671538, now seen corresponding path program 1 times [2021-11-21 00:07:05,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:05,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135317226] [2021-11-21 00:07:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:05,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:07:05,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:05,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135317226] [2021-11-21 00:07:05,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135317226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:05,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312024990] [2021-11-21 00:07:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:05,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:05,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:05,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:05,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:07:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:05,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:07:05,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:07:06,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:07:06,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312024990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:06,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:07:06,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-21 00:07:06,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990564170] [2021-11-21 00:07:06,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:06,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:07:06,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:07:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:07:06,209 INFO L87 Difference]: Start difference. First operand 3086 states and 4843 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:07:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:06,589 INFO L93 Difference]: Finished difference Result 6211 states and 9938 transitions. [2021-11-21 00:07:06,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:07:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2021-11-21 00:07:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:06,617 INFO L225 Difference]: With dead ends: 6211 [2021-11-21 00:07:06,617 INFO L226 Difference]: Without dead ends: 3140 [2021-11-21 00:07:06,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:07:06,660 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 85 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:06,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1689 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:07:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2021-11-21 00:07:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 3140. [2021-11-21 00:07:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 2253 states have (on average 1.486462494451842) internal successors, (3349), 2329 states have internal predecessors, (3349), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2021-11-21 00:07:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4897 transitions. [2021-11-21 00:07:06,911 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4897 transitions. Word has length 99 [2021-11-21 00:07:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:06,912 INFO L470 AbstractCegarLoop]: Abstraction has 3140 states and 4897 transitions. [2021-11-21 00:07:06,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:07:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4897 transitions. [2021-11-21 00:07:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-21 00:07:06,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:06,917 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:06,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:07:07,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:07,141 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:07,142 INFO L85 PathProgramCache]: Analyzing trace with hash -52146884, now seen corresponding path program 1 times [2021-11-21 00:07:07,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:07,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282887783] [2021-11-21 00:07:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:07,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:07:07,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:07,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282887783] [2021-11-21 00:07:07,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282887783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:07,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432195513] [2021-11-21 00:07:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:07,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:07,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:07,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:07,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:07:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:07,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:07:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:07:07,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:07:07,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432195513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:07,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:07:07,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-21 00:07:07,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571736896] [2021-11-21 00:07:07,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:07,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:07:07,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:07:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:07:07,866 INFO L87 Difference]: Start difference. First operand 3140 states and 4897 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:07:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:08,189 INFO L93 Difference]: Finished difference Result 6292 states and 9956 transitions. [2021-11-21 00:07:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:07:08,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 102 [2021-11-21 00:07:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:08,214 INFO L225 Difference]: With dead ends: 6292 [2021-11-21 00:07:08,215 INFO L226 Difference]: Without dead ends: 3131 [2021-11-21 00:07:08,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:07:08,238 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 91 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:08,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1685 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:07:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-21 00:07:08,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2021-11-21 00:07:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2244 states have (on average 1.4763814616755793) internal successors, (3313), 2320 states have internal predecessors, (3313), 655 states have call successors, (655), 206 states have call predecessors, (655), 231 states have return successors, (893), 662 states have call predecessors, (893), 644 states have call successors, (893) [2021-11-21 00:07:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4861 transitions. [2021-11-21 00:07:08,428 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4861 transitions. Word has length 102 [2021-11-21 00:07:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:08,429 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 4861 transitions. [2021-11-21 00:07:08,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:07:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4861 transitions. [2021-11-21 00:07:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 00:07:08,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:08,433 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, 1, 1, 1, 1] [2021-11-21 00:07:08,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:08,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:08,657 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:08,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1292378790, now seen corresponding path program 1 times [2021-11-21 00:07:08,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:08,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817389906] [2021-11-21 00:07:08,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:08,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:07:08,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:08,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817389906] [2021-11-21 00:07:08,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817389906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:08,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020604721] [2021-11-21 00:07:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:08,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:08,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:08,762 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:08,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:07:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:09,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:07:09,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:07:09,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:07:09,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020604721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:09,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:07:09,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 00:07:09,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830424047] [2021-11-21 00:07:09,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:09,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:07:09,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:07:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:07:09,279 INFO L87 Difference]: Start difference. First operand 3131 states and 4861 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:07:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:10,425 INFO L93 Difference]: Finished difference Result 8109 states and 13165 transitions. [2021-11-21 00:07:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:07:10,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2021-11-21 00:07:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:10,485 INFO L225 Difference]: With dead ends: 8109 [2021-11-21 00:07:10,485 INFO L226 Difference]: Without dead ends: 4993 [2021-11-21 00:07:10,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:07:10,509 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 619 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:10,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 2002 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 00:07:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-11-21 00:07:10,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4931. [2021-11-21 00:07:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3556 states have (on average 1.4569741282339708) internal successors, (5181), 3678 states have internal predecessors, (5181), 1011 states have call successors, (1011), 324 states have call predecessors, (1011), 363 states have return successors, (1624), 1022 states have call predecessors, (1624), 994 states have call successors, (1624) [2021-11-21 00:07:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7816 transitions. [2021-11-21 00:07:10,845 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7816 transitions. Word has length 103 [2021-11-21 00:07:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:10,845 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 7816 transitions. [2021-11-21 00:07:10,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:07:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7816 transitions. [2021-11-21 00:07:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-21 00:07:10,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:10,851 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, 1, 1, 1, 1, 1] [2021-11-21 00:07:10,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:11,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 00:07:11,065 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:11,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 450152023, now seen corresponding path program 1 times [2021-11-21 00:07:11,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:11,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827535649] [2021-11-21 00:07:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:11,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:07:11,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:11,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827535649] [2021-11-21 00:07:11,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827535649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:11,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657798343] [2021-11-21 00:07:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:11,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:11,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:11,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:11,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:07:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:11,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:07:11,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:07:11,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:07:11,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657798343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:11,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:07:11,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-21 00:07:11,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452809413] [2021-11-21 00:07:11,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:11,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:07:11,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:07:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:07:11,786 INFO L87 Difference]: Start difference. First operand 4931 states and 7816 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:07:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:12,820 INFO L93 Difference]: Finished difference Result 11020 states and 18004 transitions. [2021-11-21 00:07:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:07:12,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2021-11-21 00:07:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:12,861 INFO L225 Difference]: With dead ends: 11020 [2021-11-21 00:07:12,862 INFO L226 Difference]: Without dead ends: 6104 [2021-11-21 00:07:12,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:07:12,895 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 699 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:12,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 3257 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:07:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6104 states. [2021-11-21 00:07:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6104 to 6080. [2021-11-21 00:07:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4412 states have (on average 1.4320036264732547) internal successors, (6318), 4548 states have internal predecessors, (6318), 1174 states have call successors, (1174), 449 states have call predecessors, (1174), 493 states have return successors, (2598), 1175 states have call predecessors, (2598), 1145 states have call successors, (2598) [2021-11-21 00:07:13,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 10090 transitions. [2021-11-21 00:07:13,401 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 10090 transitions. Word has length 104 [2021-11-21 00:07:13,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:13,402 INFO L470 AbstractCegarLoop]: Abstraction has 6080 states and 10090 transitions. [2021-11-21 00:07:13,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-21 00:07:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 10090 transitions. [2021-11-21 00:07:13,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-21 00:07:13,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:13,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:13,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:13,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:13,633 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:13,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:13,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2008991990, now seen corresponding path program 1 times [2021-11-21 00:07:13,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:13,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326245549] [2021-11-21 00:07:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:13,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:07:13,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:13,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326245549] [2021-11-21 00:07:13,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326245549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:13,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747184511] [2021-11-21 00:07:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:13,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:13,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:13,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:13,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:07:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:07:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:07:14,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:07:14,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747184511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:14,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:07:14,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-21 00:07:14,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153969768] [2021-11-21 00:07:14,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:14,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:07:14,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:14,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:07:14,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:07:14,205 INFO L87 Difference]: Start difference. First operand 6080 states and 10090 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:07:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:14,670 INFO L93 Difference]: Finished difference Result 11905 states and 20369 transitions. [2021-11-21 00:07:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:07:14,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 108 [2021-11-21 00:07:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:14,715 INFO L225 Difference]: With dead ends: 11905 [2021-11-21 00:07:14,715 INFO L226 Difference]: Without dead ends: 5678 [2021-11-21 00:07:14,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:07:14,873 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 4 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:14,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1771 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:07:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2021-11-21 00:07:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5479. [2021-11-21 00:07:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 3922 states have (on average 1.4280979092299848) internal successors, (5601), 4050 states have internal predecessors, (5601), 1109 states have call successors, (1109), 413 states have call predecessors, (1109), 447 states have return successors, (2203), 1108 states have call predecessors, (2203), 1084 states have call successors, (2203) [2021-11-21 00:07:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 8913 transitions. [2021-11-21 00:07:15,216 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 8913 transitions. Word has length 108 [2021-11-21 00:07:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:15,217 INFO L470 AbstractCegarLoop]: Abstraction has 5479 states and 8913 transitions. [2021-11-21 00:07:15,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:07:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 8913 transitions. [2021-11-21 00:07:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-21 00:07:15,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:15,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:15,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:15,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:15,449 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2048400244, now seen corresponding path program 1 times [2021-11-21 00:07:15,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:15,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382967938] [2021-11-21 00:07:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:15,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:07:15,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:15,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382967938] [2021-11-21 00:07:15,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382967938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:15,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948110565] [2021-11-21 00:07:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:15,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:15,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:15,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:15,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:07:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:15,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:07:15,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:07:16,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:07:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:07:16,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948110565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:07:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144989742] [2021-11-21 00:07:16,569 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2021-11-21 00:07:16,569 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:07:16,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:07:16,580 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:07:16,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:27,098 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2021-11-21 00:08:53,400 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2021-11-21 00:08:55,528 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2021-11-21 00:09:34,490 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 787 for LOIs [2021-11-21 00:09:57,990 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2021-11-21 00:10:05,859 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:10:14,870 WARN L227 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:10:40,586 WARN L227 SmtUtils]: Spent 17.37s on a formula simplification. DAG size of input: 787 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:10:47,222 WARN L227 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 597 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:11:11,898 WARN L227 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 612 DAG size of output: 584 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:11:14,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1144989742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:11:14,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:11:14,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 6, 7] total 32 [2021-11-21 00:11:14,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980733314] [2021-11-21 00:11:14,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:11:14,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:11:14,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:11:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:11:14,286 INFO L87 Difference]: Start difference. First operand 5479 states and 8913 transitions. Second operand has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-21 00:11:32,255 WARN L227 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 597 DAG size of output: 552 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:11:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:54,833 INFO L93 Difference]: Finished difference Result 10981 states and 17875 transitions. [2021-11-21 00:11:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:11:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 111 [2021-11-21 00:11:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:54,862 INFO L225 Difference]: With dead ends: 10981 [2021-11-21 00:11:54,862 INFO L226 Difference]: Without dead ends: 5525 [2021-11-21 00:11:54,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 90.3s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 00:11:54,902 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 39 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 4310 SdHoareTripleChecker+Invalid, 3838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:54,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 4310 Invalid, 3838 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 3821 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2021-11-21 00:11:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-11-21 00:11:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 5499. [2021-11-21 00:11:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3938 states have (on average 1.4268664296597258) internal successors, (5619), 4065 states have internal predecessors, (5619), 1111 states have call successors, (1111), 415 states have call predecessors, (1111), 449 states have return successors, (2205), 1111 states have call predecessors, (2205), 1086 states have call successors, (2205) [2021-11-21 00:11:55,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 8935 transitions. [2021-11-21 00:11:55,280 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 8935 transitions. Word has length 111 [2021-11-21 00:11:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:55,280 INFO L470 AbstractCegarLoop]: Abstraction has 5499 states and 8935 transitions. [2021-11-21 00:11:55,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 4.6) internal successors, (69), 13 states have internal predecessors, (69), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-21 00:11:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 8935 transitions. [2021-11-21 00:11:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-21 00:11:55,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:55,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:55,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 00:11:55,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:55,501 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:55,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:55,502 INFO L85 PathProgramCache]: Analyzing trace with hash -462717573, now seen corresponding path program 1 times [2021-11-21 00:11:55,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:55,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882930873] [2021-11-21 00:11:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:55,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:11:55,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:55,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882930873] [2021-11-21 00:11:55,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882930873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:11:55,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:11:55,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:11:55,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887662425] [2021-11-21 00:11:55,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:11:55,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:11:55,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:11:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:11:55,585 INFO L87 Difference]: Start difference. First operand 5499 states and 8935 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:11:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:56,309 INFO L93 Difference]: Finished difference Result 11386 states and 19601 transitions. [2021-11-21 00:11:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:11:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 112 [2021-11-21 00:11:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:56,348 INFO L225 Difference]: With dead ends: 11386 [2021-11-21 00:11:56,348 INFO L226 Difference]: Without dead ends: 6539 [2021-11-21 00:11:56,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:11:56,390 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 252 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:56,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 2553 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:11:56,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-11-21 00:11:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6323. [2021-11-21 00:11:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 4401 states have (on average 1.4314928425357873) internal successors, (6300), 4639 states have internal predecessors, (6300), 1454 states have call successors, (1454), 415 states have call predecessors, (1454), 467 states have return successors, (2858), 1433 states have call predecessors, (2858), 1429 states have call successors, (2858) [2021-11-21 00:11:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10612 transitions. [2021-11-21 00:11:56,831 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10612 transitions. Word has length 112 [2021-11-21 00:11:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:56,832 INFO L470 AbstractCegarLoop]: Abstraction has 6323 states and 10612 transitions. [2021-11-21 00:11:56,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 00:11:56,832 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10612 transitions. [2021-11-21 00:11:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-21 00:11:56,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:56,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:56,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:11:56,842 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:56,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:56,842 INFO L85 PathProgramCache]: Analyzing trace with hash 51392960, now seen corresponding path program 1 times [2021-11-21 00:11:56,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:56,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617537549] [2021-11-21 00:11:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:56,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 00:11:56,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:56,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617537549] [2021-11-21 00:11:56,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617537549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:11:56,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159877619] [2021-11-21 00:11:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:56,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:56,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:56,945 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:56,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3040ef81-4719-4650-a61c-a14c4f3f266d/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:11:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:11:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:11:57,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:11:57,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159877619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:57,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747914217] [2021-11-21 00:11:57,839 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2021-11-21 00:11:57,840 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:11:57,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:11:57,841 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:11:57,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:13:10,441 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 572 for LOIs [2021-11-21 00:16:22,863 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 455 for LOIs [2021-11-21 00:16:26,207 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 450 for LOIs [2021-11-21 00:16:30,270 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 448 for LOIs [2021-11-21 00:16:33,792 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 457 for LOIs [2021-11-21 00:17:03,616 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 453 for LOIs [2021-11-21 00:17:08,144 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 437 for LOIs [2021-11-21 00:17:10,113 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 540 for LOIs [2021-11-21 00:18:00,463 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 787 for LOIs [2021-11-21 00:18:26,668 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 637 for LOIs [2021-11-21 00:18:35,400 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:18:43,495 WARN L227 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 637 DAG size of output: 573 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:19:08,281 WARN L227 SmtUtils]: Spent 16.48s on a formula simplification. DAG size of input: 787 DAG size of output: 654 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)