./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V --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 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:21:03,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:21:03,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:21:03,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:21:03,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:21:03,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:21:03,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:21:03,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:21:03,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:21:03,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:21:03,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:21:03,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:21:03,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:21:03,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:21:03,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:21:03,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:21:03,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:21:03,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:21:03,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:21:03,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:21:03,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:21:03,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:21:03,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:21:03,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:21:03,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:21:03,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:21:03,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:21:03,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:21:03,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:21:03,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:21:03,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:21:03,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:21:03,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:21:03,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:21:03,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:21:03,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:21:03,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:21:03,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:21:03,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:21:03,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:21:03,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:21:03,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:21:04,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:21:04,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:21:04,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:21:04,007 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:21:04,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:21:04,009 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:21:04,009 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:21:04,009 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:21:04,010 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:21:04,010 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:21:04,010 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:21:04,011 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:21:04,011 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:21:04,011 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:21:04,012 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:21:04,012 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:21:04,012 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:21:04,013 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:21:04,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:21:04,014 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:21:04,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:21:04,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:21:04,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:21:04,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:21:04,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:21:04,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:21:04,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:21:04,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:21:04,017 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:21:04,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:21:04,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:21:04,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:21:04,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:21:04,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:21:04,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:21:04,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:21:04,020 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:21:04,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:21:04,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:21:04,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:21:04,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:21:04,021 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_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2021-11-23 02:21:04,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:21:04,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:21:04,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:21:04,392 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:21:04,393 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:21:04,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-23 02:21:04,506 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/data/22eb64b7a/adfcad8f40a3431f9e34ba8d5146f7b8/FLAG8675b0c93 [2021-11-23 02:21:05,329 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:21:05,330 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2021-11-23 02:21:05,363 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/data/22eb64b7a/adfcad8f40a3431f9e34ba8d5146f7b8/FLAG8675b0c93 [2021-11-23 02:21:05,448 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/data/22eb64b7a/adfcad8f40a3431f9e34ba8d5146f7b8 [2021-11-23 02:21:05,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:21:05,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:21:05,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:21:05,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:21:05,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:21:05,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:21:05" (1/1) ... [2021-11-23 02:21:05,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9fceba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:05, skipping insertion in model container [2021-11-23 02:21:05,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:21:05" (1/1) ... [2021-11-23 02:21:05,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:21:05,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:21:06,182 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_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-23 02:21:06,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:21:06,370 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:21:06,451 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_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2021-11-23 02:21:06,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:21:06,581 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:21:06,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06 WrapperNode [2021-11-23 02:21:06,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:21:06,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:21:06,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:21:06,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:21:06,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,785 INFO L137 Inliner]: procedures = 97, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1178 [2021-11-23 02:21:06,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:21:06,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:21:06,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:21:06,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:21:06,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:21:06,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:21:06,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:21:06,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:21:06,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (1/1) ... [2021-11-23 02:21:06,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:21:06,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:06,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:21:06,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:21:06,984 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-23 02:21:06,984 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-23 02:21:06,985 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 02:21:06,985 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 02:21:06,985 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 02:21:06,985 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 02:21:06,985 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 02:21:06,986 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 02:21:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 02:21:06,986 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 02:21:06,986 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 02:21:06,986 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 02:21:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-23 02:21:06,987 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-23 02:21:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 02:21:06,987 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 02:21:06,987 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 02:21:06,987 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 02:21:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:21:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-23 02:21:06,988 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-23 02:21:06,988 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-23 02:21:06,988 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-23 02:21:06,989 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 02:21:06,989 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 02:21:06,989 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 02:21:06,990 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 02:21:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-23 02:21:06,990 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-23 02:21:06,990 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-23 02:21:06,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-23 02:21:06,992 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 02:21:06,992 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 02:21:06,993 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 02:21:06,993 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 02:21:06,993 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-23 02:21:06,993 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-23 02:21:06,994 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 02:21:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 02:21:06,994 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 02:21:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 02:21:06,994 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 02:21:06,994 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 02:21:06,995 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 02:21:06,995 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 02:21:06,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:21:06,996 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 02:21:06,997 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 02:21:06,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:21:06,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:21:06,999 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 02:21:06,999 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 02:21:07,000 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-23 02:21:07,000 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-23 02:21:07,218 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:21:07,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:21:08,684 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:21:09,482 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:21:09,482 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:21:09,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:21:09 BoogieIcfgContainer [2021-11-23 02:21:09,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:21:09,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:21:09,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:21:09,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:21:09,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:21:05" (1/3) ... [2021-11-23 02:21:09,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f66b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:21:09, skipping insertion in model container [2021-11-23 02:21:09,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:06" (2/3) ... [2021-11-23 02:21:09,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f66b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:21:09, skipping insertion in model container [2021-11-23 02:21:09,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:21:09" (3/3) ... [2021-11-23 02:21:09,500 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2021-11-23 02:21:09,511 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:21:09,512 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:21:09,608 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:21:09,625 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 [2021-11-23 02:21:09,625 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:21:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-23 02:21:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:21:09,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:09,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:09,716 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1587334211, now seen corresponding path program 1 times [2021-11-23 02:21:09,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:09,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025933930] [2021-11-23 02:21:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:09,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:10,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:10,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025933930] [2021-11-23 02:21:10,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025933930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:10,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:10,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:21:10,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411475395] [2021-11-23 02:21:10,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:10,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:21:10,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:21:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:21:10,364 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:21:10,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:10,560 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2021-11-23 02:21:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:21:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2021-11-23 02:21:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:10,609 INFO L225 Difference]: With dead ends: 401 [2021-11-23 02:21:10,609 INFO L226 Difference]: Without dead ends: 379 [2021-11-23 02:21:10,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:21:10,627 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:10,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:21:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-23 02:21:10,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2021-11-23 02:21:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-23 02:21:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2021-11-23 02:21:10,823 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2021-11-23 02:21:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:10,825 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2021-11-23 02:21:10,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:21:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2021-11-23 02:21:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:21:10,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:10,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:10,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:21:10,833 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:10,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:10,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1461820053, now seen corresponding path program 1 times [2021-11-23 02:21:10,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:10,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277124456] [2021-11-23 02:21:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:10,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:11,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:11,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277124456] [2021-11-23 02:21:11,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277124456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:11,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:11,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:21:11,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762997797] [2021-11-23 02:21:11,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:11,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:21:11,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:21:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:21:11,214 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 02:21:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:13,875 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2021-11-23 02:21:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:21:13,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2021-11-23 02:21:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:13,891 INFO L225 Difference]: With dead ends: 1243 [2021-11-23 02:21:13,891 INFO L226 Difference]: Without dead ends: 880 [2021-11-23 02:21:13,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:21:13,909 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 1209 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:13,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 1394 Invalid, 1824 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [465 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:21:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-23 02:21:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2021-11-23 02:21:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2021-11-23 02:21:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2021-11-23 02:21:14,067 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2021-11-23 02:21:14,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:14,067 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2021-11-23 02:21:14,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 02:21:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2021-11-23 02:21:14,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-23 02:21:14,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:14,082 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:14,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:21:14,083 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1378588201, now seen corresponding path program 1 times [2021-11-23 02:21:14,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:14,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947323933] [2021-11-23 02:21:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:14,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:21:14,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947323933] [2021-11-23 02:21:14,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947323933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:14,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:14,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:21:14,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920693829] [2021-11-23 02:21:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:14,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:21:14,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:21:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:21:14,348 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:21:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:17,888 INFO L93 Difference]: Finished difference Result 2747 states and 4462 transitions. [2021-11-23 02:21:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:21:17,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2021-11-23 02:21:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:17,905 INFO L225 Difference]: With dead ends: 2747 [2021-11-23 02:21:17,905 INFO L226 Difference]: Without dead ends: 1970 [2021-11-23 02:21:17,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:21:17,912 INFO L933 BasicCegarLoop]: 939 mSDtfsCounter, 1340 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 4014 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 4733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 4014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:17,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1416 Valid, 2587 Invalid, 4733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 4014 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:21:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-11-23 02:21:18,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1783. [2021-11-23 02:21:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1211 states have (on average 1.5730800990916598) internal successors, (1905), 1283 states have internal predecessors, (1905), 479 states have call successors, (479), 80 states have call predecessors, (479), 92 states have return successors, (498), 452 states have call predecessors, (498), 474 states have call successors, (498) [2021-11-23 02:21:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2882 transitions. [2021-11-23 02:21:18,084 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2882 transitions. Word has length 87 [2021-11-23 02:21:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:18,085 INFO L470 AbstractCegarLoop]: Abstraction has 1783 states and 2882 transitions. [2021-11-23 02:21:18,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:21:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2882 transitions. [2021-11-23 02:21:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:21:18,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:18,093 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:18,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:21:18,093 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:18,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1652019250, now seen corresponding path program 1 times [2021-11-23 02:21:18,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:18,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414227108] [2021-11-23 02:21:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:18,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:21:18,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:18,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414227108] [2021-11-23 02:21:18,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414227108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:18,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:18,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:21:18,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184675674] [2021-11-23 02:21:18,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:18,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:21:18,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:18,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:21:18,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:21:18,321 INFO L87 Difference]: Start difference. First operand 1783 states and 2882 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:21:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:20,450 INFO L93 Difference]: Finished difference Result 4518 states and 7313 transitions. [2021-11-23 02:21:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:21:20,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2021-11-23 02:21:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:20,476 INFO L225 Difference]: With dead ends: 4518 [2021-11-23 02:21:20,477 INFO L226 Difference]: Without dead ends: 2753 [2021-11-23 02:21:20,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:21:20,490 INFO L933 BasicCegarLoop]: 619 mSDtfsCounter, 1140 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:20,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 1936 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 02:21:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-11-23 02:21:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2635. [2021-11-23 02:21:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1815 states have (on average 1.5801652892561984) internal successors, (2868), 1914 states have internal predecessors, (2868), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2021-11-23 02:21:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4253 transitions. [2021-11-23 02:21:20,711 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4253 transitions. Word has length 88 [2021-11-23 02:21:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:20,712 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 4253 transitions. [2021-11-23 02:21:20,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:21:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4253 transitions. [2021-11-23 02:21:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:21:20,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:20,718 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:20,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:21:20,719 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 762048878, now seen corresponding path program 1 times [2021-11-23 02:21:20,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:20,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570817722] [2021-11-23 02:21:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:20,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:21:20,935 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570817722] [2021-11-23 02:21:20,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570817722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:20,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:20,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:20,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289096997] [2021-11-23 02:21:20,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:20,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:20,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:21:20,941 INFO L87 Difference]: Start difference. First operand 2635 states and 4253 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:22,425 INFO L93 Difference]: Finished difference Result 7099 states and 11572 transitions. [2021-11-23 02:21:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:22,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2021-11-23 02:21:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:22,469 INFO L225 Difference]: With dead ends: 7099 [2021-11-23 02:21:22,469 INFO L226 Difference]: Without dead ends: 4480 [2021-11-23 02:21:22,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:22,495 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 1157 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:22,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1229 Valid, 966 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 02:21:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2021-11-23 02:21:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 4139. [2021-11-23 02:21:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 2859 states have (on average 1.5739769150052465) internal successors, (4500), 3022 states have internal predecessors, (4500), 1039 states have call successors, (1039), 195 states have call predecessors, (1039), 240 states have return successors, (1152), 981 states have call predecessors, (1152), 1034 states have call successors, (1152) [2021-11-23 02:21:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 6691 transitions. [2021-11-23 02:21:22,873 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 6691 transitions. Word has length 92 [2021-11-23 02:21:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:22,875 INFO L470 AbstractCegarLoop]: Abstraction has 4139 states and 6691 transitions. [2021-11-23 02:21:22,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 6691 transitions. [2021-11-23 02:21:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 02:21:22,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:22,882 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:22,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:21:22,882 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:22,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2146569476, now seen corresponding path program 1 times [2021-11-23 02:21:22,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:22,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937300649] [2021-11-23 02:21:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:22,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:21:23,048 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937300649] [2021-11-23 02:21:23,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937300649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:23,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:23,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:23,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386921515] [2021-11-23 02:21:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:23,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:23,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:23,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:23,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:21:23,052 INFO L87 Difference]: Start difference. First operand 4139 states and 6691 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, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:24,749 INFO L93 Difference]: Finished difference Result 11471 states and 18796 transitions. [2021-11-23 02:21:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:24,750 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, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2021-11-23 02:21:24,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:24,825 INFO L225 Difference]: With dead ends: 11471 [2021-11-23 02:21:24,825 INFO L226 Difference]: Without dead ends: 7349 [2021-11-23 02:21:24,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:24,860 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 1144 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:24,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 975 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 02:21:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7349 states. [2021-11-23 02:21:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7349 to 6954. [2021-11-23 02:21:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6954 states, 4818 states have (on average 1.5720215857202158) internal successors, (7574), 5121 states have internal predecessors, (7574), 1717 states have call successors, (1717), 325 states have call predecessors, (1717), 418 states have return successors, (2000), 1607 states have call predecessors, (2000), 1712 states have call successors, (2000) [2021-11-23 02:21:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6954 states to 6954 states and 11291 transitions. [2021-11-23 02:21:25,459 INFO L78 Accepts]: Start accepts. Automaton has 6954 states and 11291 transitions. Word has length 93 [2021-11-23 02:21:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:25,460 INFO L470 AbstractCegarLoop]: Abstraction has 6954 states and 11291 transitions. [2021-11-23 02:21:25,462 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, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6954 states and 11291 transitions. [2021-11-23 02:21:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:21:25,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:25,474 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:25,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:21:25,474 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:25,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2119421328, now seen corresponding path program 1 times [2021-11-23 02:21:25,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:25,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342022694] [2021-11-23 02:21:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:25,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:21:25,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:25,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342022694] [2021-11-23 02:21:25,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342022694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:25,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:25,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:25,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013350159] [2021-11-23 02:21:25,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:25,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:25,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:25,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:21:25,636 INFO L87 Difference]: Start difference. First operand 6954 states and 11291 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:27,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:27,750 INFO L93 Difference]: Finished difference Result 19986 states and 33155 transitions. [2021-11-23 02:21:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:27,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2021-11-23 02:21:27,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:27,947 INFO L225 Difference]: With dead ends: 19986 [2021-11-23 02:21:27,948 INFO L226 Difference]: Without dead ends: 13051 [2021-11-23 02:21:28,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:28,011 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 1131 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1201 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:28,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1201 Valid, 984 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 02:21:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13051 states. [2021-11-23 02:21:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13051 to 12519. [2021-11-23 02:21:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12519 states, 8681 states have (on average 1.5680221172675959) internal successors, (13612), 9276 states have internal predecessors, (13612), 3051 states have call successors, (3051), 585 states have call predecessors, (3051), 786 states have return successors, (3854), 2837 states have call predecessors, (3854), 3046 states have call successors, (3854) [2021-11-23 02:21:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12519 states to 12519 states and 20517 transitions. [2021-11-23 02:21:29,181 INFO L78 Accepts]: Start accepts. Automaton has 12519 states and 20517 transitions. Word has length 94 [2021-11-23 02:21:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:29,184 INFO L470 AbstractCegarLoop]: Abstraction has 12519 states and 20517 transitions. [2021-11-23 02:21:29,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12519 states and 20517 transitions. [2021-11-23 02:21:29,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:21:29,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:29,191 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:29,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:21:29,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:29,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:29,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1277824834, now seen corresponding path program 1 times [2021-11-23 02:21:29,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:29,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166220031] [2021-11-23 02:21:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:29,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:21:29,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:29,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166220031] [2021-11-23 02:21:29,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166220031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:29,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:29,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:29,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041111993] [2021-11-23 02:21:29,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:29,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:29,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:29,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:21:29,359 INFO L87 Difference]: Start difference. First operand 12519 states and 20517 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:32,626 INFO L93 Difference]: Finished difference Result 36831 states and 62578 transitions. [2021-11-23 02:21:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:32,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2021-11-23 02:21:32,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:32,829 INFO L225 Difference]: With dead ends: 36831 [2021-11-23 02:21:32,830 INFO L226 Difference]: Without dead ends: 24335 [2021-11-23 02:21:32,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:32,912 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 1118 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:32,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 996 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 02:21:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24335 states. [2021-11-23 02:21:34,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24335 to 23500. [2021-11-23 02:21:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23500 states, 16284 states have (on average 1.5623925325472856) internal successors, (25442), 17487 states have internal predecessors, (25442), 5669 states have call successors, (5669), 1105 states have call predecessors, (5669), 1546 states have return successors, (8124), 5247 states have call predecessors, (8124), 5664 states have call successors, (8124) [2021-11-23 02:21:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23500 states to 23500 states and 39235 transitions. [2021-11-23 02:21:35,243 INFO L78 Accepts]: Start accepts. Automaton has 23500 states and 39235 transitions. Word has length 95 [2021-11-23 02:21:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:35,244 INFO L470 AbstractCegarLoop]: Abstraction has 23500 states and 39235 transitions. [2021-11-23 02:21:35,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 23500 states and 39235 transitions. [2021-11-23 02:21:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 02:21:35,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:35,251 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:35,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:21:35,252 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash -958133390, now seen corresponding path program 1 times [2021-11-23 02:21:35,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:35,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970165868] [2021-11-23 02:21:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:35,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:21:35,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:35,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970165868] [2021-11-23 02:21:35,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970165868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:35,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:35,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:35,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461762511] [2021-11-23 02:21:35,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:35,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:35,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:35,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:35,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:21:35,436 INFO L87 Difference]: Start difference. First operand 23500 states and 39235 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:39,484 INFO L93 Difference]: Finished difference Result 70293 states and 124758 transitions. [2021-11-23 02:21:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2021-11-23 02:21:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:40,117 INFO L225 Difference]: With dead ends: 70293 [2021-11-23 02:21:40,117 INFO L226 Difference]: Without dead ends: 46814 [2021-11-23 02:21:40,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:40,280 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 1127 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:40,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1195 Valid, 990 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-23 02:21:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46814 states. [2021-11-23 02:21:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46814 to 44953. [2021-11-23 02:21:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44953 states, 31143 states have (on average 1.559194682593199) internal successors, (48558), 33514 states have internal predecessors, (48558), 10796 states have call successors, (10796), 2141 states have call predecessors, (10796), 3013 states have return successors, (17949), 9957 states have call predecessors, (17949), 10791 states have call successors, (17949) [2021-11-23 02:21:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44953 states to 44953 states and 77303 transitions. [2021-11-23 02:21:44,766 INFO L78 Accepts]: Start accepts. Automaton has 44953 states and 77303 transitions. Word has length 96 [2021-11-23 02:21:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:44,768 INFO L470 AbstractCegarLoop]: Abstraction has 44953 states and 77303 transitions. [2021-11-23 02:21:44,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:21:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 44953 states and 77303 transitions. [2021-11-23 02:21:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:21:44,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:44,779 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:44,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:21:44,779 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:44,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1386158495, now seen corresponding path program 1 times [2021-11-23 02:21:44,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:44,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215677427] [2021-11-23 02:21:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:44,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 02:21:44,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:44,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215677427] [2021-11-23 02:21:44,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215677427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:44,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:44,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:44,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223621274] [2021-11-23 02:21:44,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:44,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:44,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:44,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:21:44,901 INFO L87 Difference]: Start difference. First operand 44953 states and 77303 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:21:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:48,131 INFO L93 Difference]: Finished difference Result 91572 states and 162244 transitions. [2021-11-23 02:21:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:48,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 144 [2021-11-23 02:21:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:48,523 INFO L225 Difference]: With dead ends: 91572 [2021-11-23 02:21:48,523 INFO L226 Difference]: Without dead ends: 46636 [2021-11-23 02:21:49,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:21:49,060 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 30 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:49,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1672 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:21:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46636 states. [2021-11-23 02:21:52,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46636 to 45151. [2021-11-23 02:21:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45151 states, 31341 states have (on average 1.5556619125107687) internal successors, (48756), 33712 states have internal predecessors, (48756), 10796 states have call successors, (10796), 2141 states have call predecessors, (10796), 3013 states have return successors, (17949), 9957 states have call predecessors, (17949), 10791 states have call successors, (17949) [2021-11-23 02:21:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45151 states to 45151 states and 77501 transitions. [2021-11-23 02:21:52,825 INFO L78 Accepts]: Start accepts. Automaton has 45151 states and 77501 transitions. Word has length 144 [2021-11-23 02:21:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:52,826 INFO L470 AbstractCegarLoop]: Abstraction has 45151 states and 77501 transitions. [2021-11-23 02:21:52,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:21:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 45151 states and 77501 transitions. [2021-11-23 02:21:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 02:21:52,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:52,841 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:52,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:21:52,842 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:52,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1400713523, now seen corresponding path program 1 times [2021-11-23 02:21:52,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:52,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956983497] [2021-11-23 02:21:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:52,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 02:21:53,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:53,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956983497] [2021-11-23 02:21:53,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956983497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:21:53,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587261179] [2021-11-23 02:21:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:53,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:53,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:53,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:21:53,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:21:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:53,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:21:53,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:21:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:21:54,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:21:54,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587261179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:54,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:21:54,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-23 02:21:54,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224485481] [2021-11-23 02:21:54,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:54,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:54,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:54,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:54,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:21:54,035 INFO L87 Difference]: Start difference. First operand 45151 states and 77501 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:21:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:57,183 INFO L93 Difference]: Finished difference Result 92859 states and 165808 transitions. [2021-11-23 02:21:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:21:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 147 [2021-11-23 02:21:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:57,666 INFO L225 Difference]: With dead ends: 92859 [2021-11-23 02:21:57,666 INFO L226 Difference]: Without dead ends: 47725 [2021-11-23 02:21:57,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:21:57,985 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 213 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:57,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1461 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:21:58,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47725 states. [2021-11-23 02:22:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47725 to 47725. [2021-11-23 02:22:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47725 states, 33849 states have (on average 1.5827350881857662) internal successors, (53574), 36220 states have internal predecessors, (53574), 10796 states have call successors, (10796), 2207 states have call predecessors, (10796), 3079 states have return successors, (17949), 9957 states have call predecessors, (17949), 10791 states have call successors, (17949) [2021-11-23 02:22:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47725 states to 47725 states and 82319 transitions. [2021-11-23 02:22:01,971 INFO L78 Accepts]: Start accepts. Automaton has 47725 states and 82319 transitions. Word has length 147 [2021-11-23 02:22:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:01,972 INFO L470 AbstractCegarLoop]: Abstraction has 47725 states and 82319 transitions. [2021-11-23 02:22:01,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:22:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 47725 states and 82319 transitions. [2021-11-23 02:22:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 02:22:01,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:01,988 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:02,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:22:02,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:22:02,202 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:02,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:02,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1119585916, now seen corresponding path program 1 times [2021-11-23 02:22:02,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:02,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773823336] [2021-11-23 02:22:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:02,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 02:22:02,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:02,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773823336] [2021-11-23 02:22:02,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773823336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:22:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60592206] [2021-11-23 02:22:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:02,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:22:02,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:22:02,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:22:02,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:22:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:22:02,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:22:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:22:03,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:22:03,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60592206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:03,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:22:03,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:22:03,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207764285] [2021-11-23 02:22:03,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:03,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:22:03,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:22:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:22:03,208 INFO L87 Difference]: Start difference. First operand 47725 states and 82319 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:22:06,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:06,480 INFO L93 Difference]: Finished difference Result 98007 states and 175180 transitions. [2021-11-23 02:22:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:22:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 152 [2021-11-23 02:22:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:06,932 INFO L225 Difference]: With dead ends: 98007 [2021-11-23 02:22:06,932 INFO L226 Difference]: Without dead ends: 50299 [2021-11-23 02:22:07,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:22:07,182 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 211 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:07,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1461 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:22:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50299 states. [2021-11-23 02:22:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50299 to 50299. [2021-11-23 02:22:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50299 states, 36357 states have (on average 1.6060731083422726) internal successors, (58392), 38728 states have internal predecessors, (58392), 10796 states have call successors, (10796), 2273 states have call predecessors, (10796), 3145 states have return successors, (17949), 9957 states have call predecessors, (17949), 10791 states have call successors, (17949) [2021-11-23 02:22:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50299 states to 50299 states and 87137 transitions. [2021-11-23 02:22:10,529 INFO L78 Accepts]: Start accepts. Automaton has 50299 states and 87137 transitions. Word has length 152 [2021-11-23 02:22:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:10,530 INFO L470 AbstractCegarLoop]: Abstraction has 50299 states and 87137 transitions. [2021-11-23 02:22:10,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:22:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50299 states and 87137 transitions. [2021-11-23 02:22:10,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:22:10,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:10,544 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:10,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:22:10,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:22:10,758 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:10,758 INFO L85 PathProgramCache]: Analyzing trace with hash -487946126, now seen corresponding path program 1 times [2021-11-23 02:22:10,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:10,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772834382] [2021-11-23 02:22:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:10,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 02:22:11,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772834382] [2021-11-23 02:22:11,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772834382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:22:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288238997] [2021-11-23 02:22:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:11,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:22:11,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:22:11,569 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:22:11,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:22:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:12,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 2074 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:22:12,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:22:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:22:12,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:22:12,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288238997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:12,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:22:12,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2021-11-23 02:22:12,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473188145] [2021-11-23 02:22:12,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:12,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:22:12,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:12,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:22:12,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:22:12,432 INFO L87 Difference]: Start difference. First operand 50299 states and 87137 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:22:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:15,398 INFO L93 Difference]: Finished difference Result 103155 states and 184552 transitions. [2021-11-23 02:22:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:22:15,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 156 [2021-11-23 02:22:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:15,760 INFO L225 Difference]: With dead ends: 103155 [2021-11-23 02:22:15,761 INFO L226 Difference]: Without dead ends: 52873 [2021-11-23 02:22:16,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:22:16,329 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 209 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:16,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1461 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:22:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52873 states. [2021-11-23 02:22:18,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52873 to 52873. [2021-11-23 02:22:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52873 states, 38865 states have (on average 1.6263990737167118) internal successors, (63210), 41236 states have internal predecessors, (63210), 10796 states have call successors, (10796), 2339 states have call predecessors, (10796), 3211 states have return successors, (17949), 9957 states have call predecessors, (17949), 10791 states have call successors, (17949) [2021-11-23 02:22:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52873 states to 52873 states and 91955 transitions. [2021-11-23 02:22:19,308 INFO L78 Accepts]: Start accepts. Automaton has 52873 states and 91955 transitions. Word has length 156 [2021-11-23 02:22:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:19,309 INFO L470 AbstractCegarLoop]: Abstraction has 52873 states and 91955 transitions. [2021-11-23 02:22:19,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:22:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 52873 states and 91955 transitions. [2021-11-23 02:22:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-23 02:22:19,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:19,321 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:19,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:22:19,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:22:19,542 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:19,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:19,542 INFO L85 PathProgramCache]: Analyzing trace with hash 846436493, now seen corresponding path program 1 times [2021-11-23 02:22:19,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:19,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279224486] [2021-11-23 02:22:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:19,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 02:22:20,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:20,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279224486] [2021-11-23 02:22:20,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279224486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:22:20,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912653547] [2021-11-23 02:22:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:20,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:22:20,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:22:20,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:22:20,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43d63296-d30f-4fc0-acb1-c625ff8e5dfc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:22:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:21,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 2077 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:22:21,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:22:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:22:21,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:22:21,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912653547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:21,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:22:21,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2021-11-23 02:22:21,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798662640] [2021-11-23 02:22:21,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:21,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:22:21,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:21,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:22:21,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:22:21,371 INFO L87 Difference]: Start difference. First operand 52873 states and 91955 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25)