./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:00:25,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:00:25,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:00:25,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:00:25,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:00:25,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:00:25,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:00:25,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:00:25,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:00:25,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:00:25,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:00:25,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:00:25,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:00:25,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:00:25,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:00:25,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:00:25,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:00:25,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:00:25,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:00:25,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:00:25,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:00:25,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:00:25,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:00:25,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:00:25,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:00:25,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:00:25,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:00:25,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:00:25,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:00:25,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:00:25,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:00:25,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:00:25,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:00:25,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:00:25,946 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:00:25,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:00:25,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:00:25,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:00:25,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:00:25,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:00:25,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:00:25,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:00:25,994 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:00:25,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:00:25,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:00:25,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:00:25,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:00:25,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:00:25,998 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:00:25,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:00:25,998 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:00:25,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:00:26,000 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:00:26,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:00:26,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:00:26,001 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:00:26,001 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:00:26,001 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:00:26,001 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:00:26,001 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:00:26,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:00:26,002 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:00:26,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:00:26,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:00:26,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:00:26,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:00:26,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:00:26,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:00:26,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:00:26,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:00:26,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:00:26,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:00:26,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:00:26,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:00:26,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:26,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:00:26,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:00:26,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:00:26,008 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:00:26,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:00:26,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:00:26,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:00:26,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:00:26,009 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_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b84cfef0f3fa5659093b8e6c2d8a82a1b18913f669c8d0a2efe9a0300cc4873 [2021-11-21 01:00:26,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:00:26,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:00:26,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:00:26,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:00:26,288 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:00:26,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-21 01:00:26,363 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/data/95bb8677f/bc7cd3e01fe2465ba5df1aa9b23034d9/FLAGb70f0565a [2021-11-21 01:00:26,952 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:00:26,961 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c [2021-11-21 01:00:27,003 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/data/95bb8677f/bc7cd3e01fe2465ba5df1aa9b23034d9/FLAGb70f0565a [2021-11-21 01:00:27,162 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/data/95bb8677f/bc7cd3e01fe2465ba5df1aa9b23034d9 [2021-11-21 01:00:27,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:00:27,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:00:27,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:27,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:00:27,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:00:27,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:27" (1/1) ... [2021-11-21 01:00:27,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eff3196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:27, skipping insertion in model container [2021-11-21 01:00:27,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:27" (1/1) ... [2021-11-21 01:00:27,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:00:27,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:00:27,878 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_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-21 01:00:27,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:27,928 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:00:28,041 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_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/sv-benchmarks/c/product-lines/elevator_spec1_product26.cil.c[55974,55987] [2021-11-21 01:00:28,053 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:28,081 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:00:28,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28 WrapperNode [2021-11-21 01:00:28,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:28,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:28,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:00:28,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:00:28,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,209 INFO L137 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 850 [2021-11-21 01:00:28,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:28,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:00:28,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:00:28,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:00:28,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:00:28,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:00:28,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:00:28,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:00:28,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (1/1) ... [2021-11-21 01:00:28,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:28,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:28,407 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:00:28,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:00:28,461 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-21 01:00:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-21 01:00:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:00:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 01:00:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 01:00:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-21 01:00:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-21 01:00:28,462 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 01:00:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 01:00:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 01:00:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 01:00:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 01:00:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 01:00:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 01:00:28,463 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 01:00:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 01:00:28,464 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 01:00:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-21 01:00:28,464 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-21 01:00:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-21 01:00:28,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-21 01:00:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 01:00:28,464 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 01:00:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 01:00:28,464 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 01:00:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 01:00:28,465 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 01:00:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 01:00:28,465 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 01:00:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 01:00:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 01:00:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__empty [2021-11-21 01:00:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__empty [2021-11-21 01:00:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 01:00:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 01:00:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 01:00:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 01:00:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 01:00:28,467 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 01:00:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:00:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 01:00:28,467 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 01:00:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 01:00:28,468 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 01:00:28,468 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 01:00:28,468 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 01:00:28,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:00:28,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:00:28,470 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 01:00:28,471 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 01:00:28,677 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:00:28,680 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:00:29,568 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:00:30,198 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:00:30,199 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:00:30,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:30 BoogieIcfgContainer [2021-11-21 01:00:30,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:00:30,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:00:30,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:00:30,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:00:30,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:00:27" (1/3) ... [2021-11-21 01:00:30,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6726fcb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:30, skipping insertion in model container [2021-11-21 01:00:30,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:28" (2/3) ... [2021-11-21 01:00:30,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6726fcb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:00:30, skipping insertion in model container [2021-11-21 01:00:30,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:00:30" (3/3) ... [2021-11-21 01:00:30,211 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product26.cil.c [2021-11-21 01:00:30,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:00:30,220 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:00:30,292 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:00:30,301 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:00:30,301 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:00:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-21 01:00:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:00:30,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:30,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:30,376 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1613791628, now seen corresponding path program 1 times [2021-11-21 01:00:30,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:30,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834219308] [2021-11-21 01:00:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:30,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:00:30,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:30,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834219308] [2021-11-21 01:00:30,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834219308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:30,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:30,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:00:30,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529514090] [2021-11-21 01:00:30,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:30,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:00:30,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:00:30,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:00:30,897 INFO L87 Difference]: Start difference. First operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-21 01:00:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:31,073 INFO L93 Difference]: Finished difference Result 381 states and 608 transitions. [2021-11-21 01:00:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:00:31,076 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 50 [2021-11-21 01:00:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:31,102 INFO L225 Difference]: With dead ends: 381 [2021-11-21 01:00:31,102 INFO L226 Difference]: Without dead ends: 359 [2021-11-21 01:00:31,109 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 [2021-11-21 01:00:31,116 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:31,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 539 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:00:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-21 01:00:31,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2021-11-21 01:00:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 242 states have (on average 1.5991735537190082) internal successors, (387), 263 states have internal predecessors, (387), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-21 01:00:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 570 transitions. [2021-11-21 01:00:31,224 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 570 transitions. Word has length 50 [2021-11-21 01:00:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:31,225 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 570 transitions. [2021-11-21 01:00:31,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-21 01:00:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 570 transitions. [2021-11-21 01:00:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:00:31,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:31,233 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:31,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:00:31,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:31,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash 42217211, now seen corresponding path program 1 times [2021-11-21 01:00:31,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:31,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841637091] [2021-11-21 01:00:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:31,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:00:31,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:31,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841637091] [2021-11-21 01:00:31,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841637091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:31,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:31,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:00:31,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993720819] [2021-11-21 01:00:31,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:31,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:00:31,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:31,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:00:31,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:00:31,554 INFO L87 Difference]: Start difference. First operand 359 states and 570 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-21 01:00:33,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:33,492 INFO L93 Difference]: Finished difference Result 1163 states and 1893 transitions. [2021-11-21 01:00:33,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:00:33,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 51 [2021-11-21 01:00:33,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:33,501 INFO L225 Difference]: With dead ends: 1163 [2021-11-21 01:00:33,501 INFO L226 Difference]: Without dead ends: 827 [2021-11-21 01:00:33,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:00:33,507 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 1899 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1959 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:33,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1959 Valid, 1072 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-21 01:00:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-21 01:00:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 740. [2021-11-21 01:00:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 524 states have (on average 1.6278625954198473) internal successors, (853), 554 states have internal predecessors, (853), 177 states have call successors, (177), 37 states have call predecessors, (177), 38 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2021-11-21 01:00:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1209 transitions. [2021-11-21 01:00:33,598 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1209 transitions. Word has length 51 [2021-11-21 01:00:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:33,600 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1209 transitions. [2021-11-21 01:00:33,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-21 01:00:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1209 transitions. [2021-11-21 01:00:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-21 01:00:33,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:33,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:33,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:00:33,608 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:33,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1613769352, now seen corresponding path program 1 times [2021-11-21 01:00:33,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:33,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883906844] [2021-11-21 01:00:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:33,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:33,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:00:33,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:33,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883906844] [2021-11-21 01:00:33,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883906844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:33,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:33,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:00:33,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368405033] [2021-11-21 01:00:33,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:33,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:00:33,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:33,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:00:33,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:33,899 INFO L87 Difference]: Start difference. First operand 740 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-21 01:00:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:36,067 INFO L93 Difference]: Finished difference Result 2506 states and 4147 transitions. [2021-11-21 01:00:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:00:36,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2021-11-21 01:00:36,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:36,083 INFO L225 Difference]: With dead ends: 2506 [2021-11-21 01:00:36,084 INFO L226 Difference]: Without dead ends: 1790 [2021-11-21 01:00:36,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:00:36,091 INFO L933 BasicCegarLoop]: 750 mSDtfsCounter, 1642 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 2102 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 2172 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 2102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:36,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 2172 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 2102 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:00:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-11-21 01:00:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1703. [2021-11-21 01:00:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1236 states have (on average 1.6472491909385114) internal successors, (2036), 1296 states have internal predecessors, (2036), 379 states have call successors, (379), 76 states have call predecessors, (379), 87 states have return successors, (406), 354 states have call predecessors, (406), 374 states have call successors, (406) [2021-11-21 01:00:36,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2821 transitions. [2021-11-21 01:00:36,244 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2821 transitions. Word has length 73 [2021-11-21 01:00:36,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:36,245 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 2821 transitions. [2021-11-21 01:00:36,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-21 01:00:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2821 transitions. [2021-11-21 01:00:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-21 01:00:36,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:36,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:36,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:00:36,250 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash 602032287, now seen corresponding path program 1 times [2021-11-21 01:00:36,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:36,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249291078] [2021-11-21 01:00:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:36,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:00:36,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:36,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249291078] [2021-11-21 01:00:36,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249291078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:36,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:36,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:00:36,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922528912] [2021-11-21 01:00:36,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:36,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:00:36,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:36,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:00:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:00:36,386 INFO L87 Difference]: Start difference. First operand 1703 states and 2821 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:00:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:36,609 INFO L93 Difference]: Finished difference Result 2741 states and 4549 transitions. [2021-11-21 01:00:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:00:36,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 77 [2021-11-21 01:00:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:36,632 INFO L225 Difference]: With dead ends: 2741 [2021-11-21 01:00:36,632 INFO L226 Difference]: Without dead ends: 1743 [2021-11-21 01:00:36,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:00:36,650 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 7 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2119 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:36,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2119 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:00:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-11-21 01:00:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1727. [2021-11-21 01:00:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1254 states have (on average 1.6379585326953747) internal successors, (2054), 1314 states have internal predecessors, (2054), 379 states have call successors, (379), 76 states have call predecessors, (379), 93 states have return successors, (418), 360 states have call predecessors, (418), 374 states have call successors, (418) [2021-11-21 01:00:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2851 transitions. [2021-11-21 01:00:36,786 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2851 transitions. Word has length 77 [2021-11-21 01:00:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:36,788 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 2851 transitions. [2021-11-21 01:00:36,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 01:00:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2851 transitions. [2021-11-21 01:00:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-21 01:00:36,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:36,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:36,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:00:36,795 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash 846573937, now seen corresponding path program 1 times [2021-11-21 01:00:36,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:36,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698288035] [2021-11-21 01:00:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:36,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:00:37,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:37,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698288035] [2021-11-21 01:00:37,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698288035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:37,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:37,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-21 01:00:37,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913138074] [2021-11-21 01:00:37,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:37,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:00:37,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:00:37,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:00:37,036 INFO L87 Difference]: Start difference. First operand 1727 states and 2851 transitions. Second operand has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 01:00:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:39,883 INFO L93 Difference]: Finished difference Result 4438 states and 7331 transitions. [2021-11-21 01:00:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:00:39,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2021-11-21 01:00:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:39,905 INFO L225 Difference]: With dead ends: 4438 [2021-11-21 01:00:39,906 INFO L226 Difference]: Without dead ends: 2734 [2021-11-21 01:00:39,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:00:39,921 INFO L933 BasicCegarLoop]: 918 mSDtfsCounter, 919 mSDsluCounter, 2248 mSDsCounter, 0 mSdLazyCounter, 4269 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 4632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 4269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:39,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 3021 Invalid, 4632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 4269 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 01:00:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-11-21 01:00:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 2635. [2021-11-21 01:00:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1915 states have (on average 1.6318537859007833) internal successors, (3125), 1997 states have internal predecessors, (3125), 576 states have call successors, (576), 110 states have call predecessors, (576), 143 states have return successors, (639), 560 states have call predecessors, (639), 571 states have call successors, (639) [2021-11-21 01:00:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4340 transitions. [2021-11-21 01:00:40,159 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4340 transitions. Word has length 80 [2021-11-21 01:00:40,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:40,160 INFO L470 AbstractCegarLoop]: Abstraction has 2635 states and 4340 transitions. [2021-11-21 01:00:40,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-21 01:00:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4340 transitions. [2021-11-21 01:00:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 01:00:40,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:40,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:40,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:00:40,164 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash -164276473, now seen corresponding path program 1 times [2021-11-21 01:00:40,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:40,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111665578] [2021-11-21 01:00:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:40,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:00:40,405 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:40,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111665578] [2021-11-21 01:00:40,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111665578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:40,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:40,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 01:00:40,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169331088] [2021-11-21 01:00:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:40,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:00:40,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:40,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:00:40,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:00:40,408 INFO L87 Difference]: Start difference. First operand 2635 states and 4340 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-21 01:00:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:42,933 INFO L93 Difference]: Finished difference Result 6397 states and 10536 transitions. [2021-11-21 01:00:42,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:00:42,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2021-11-21 01:00:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:42,971 INFO L225 Difference]: With dead ends: 6397 [2021-11-21 01:00:42,971 INFO L226 Difference]: Without dead ends: 4277 [2021-11-21 01:00:42,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:00:42,988 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 2822 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1877 mSolverCounterSat, 1286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2970 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 3163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1286 IncrementalHoareTripleChecker+Valid, 1877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:42,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2970 Valid, 1607 Invalid, 3163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1286 Valid, 1877 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 01:00:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2021-11-21 01:00:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 4169. [2021-11-21 01:00:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 2973 states have (on average 1.5876219307097208) internal successors, (4720), 3112 states have internal predecessors, (4720), 943 states have call successors, (943), 195 states have call predecessors, (943), 252 states have return successors, (1072), 916 states have call predecessors, (1072), 938 states have call successors, (1072) [2021-11-21 01:00:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 6735 transitions. [2021-11-21 01:00:43,390 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 6735 transitions. Word has length 81 [2021-11-21 01:00:43,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:43,391 INFO L470 AbstractCegarLoop]: Abstraction has 4169 states and 6735 transitions. [2021-11-21 01:00:43,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-21 01:00:43,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 6735 transitions. [2021-11-21 01:00:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-21 01:00:43,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:43,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:43,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:00:43,395 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2128896471, now seen corresponding path program 1 times [2021-11-21 01:00:43,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:43,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727828581] [2021-11-21 01:00:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:43,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:00:43,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:43,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727828581] [2021-11-21 01:00:43,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727828581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:43,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:43,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:00:43,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103838124] [2021-11-21 01:00:43,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:43,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:00:43,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:43,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:00:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:00:43,540 INFO L87 Difference]: Start difference. First operand 4169 states and 6735 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:00:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:44,111 INFO L93 Difference]: Finished difference Result 8363 states and 13743 transitions. [2021-11-21 01:00:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:00:44,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2021-11-21 01:00:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:44,160 INFO L225 Difference]: With dead ends: 8363 [2021-11-21 01:00:44,161 INFO L226 Difference]: Without dead ends: 4169 [2021-11-21 01:00:44,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:00:44,196 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 221 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:44,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 2007 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:00:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-11-21 01:00:44,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 4169. [2021-11-21 01:00:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 2973 states have (on average 1.5472586612848973) internal successors, (4600), 3112 states have internal predecessors, (4600), 943 states have call successors, (943), 195 states have call predecessors, (943), 252 states have return successors, (1072), 916 states have call predecessors, (1072), 938 states have call successors, (1072) [2021-11-21 01:00:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 6615 transitions. [2021-11-21 01:00:44,551 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 6615 transitions. Word has length 84 [2021-11-21 01:00:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:44,552 INFO L470 AbstractCegarLoop]: Abstraction has 4169 states and 6615 transitions. [2021-11-21 01:00:44,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-21 01:00:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 6615 transitions. [2021-11-21 01:00:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 01:00:44,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:44,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:44,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:00:44,559 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:44,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1552252833, now seen corresponding path program 1 times [2021-11-21 01:00:44,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:44,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977001361] [2021-11-21 01:00:44,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:44,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:00:44,776 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:44,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977001361] [2021-11-21 01:00:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977001361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:44,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:44,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:00:44,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685645370] [2021-11-21 01:00:44,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:44,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:00:44,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:44,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:00:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:44,779 INFO L87 Difference]: Start difference. First operand 4169 states and 6615 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:00:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:47,097 INFO L93 Difference]: Finished difference Result 8254 states and 13127 transitions. [2021-11-21 01:00:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:00:47,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 86 [2021-11-21 01:00:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:47,141 INFO L225 Difference]: With dead ends: 8254 [2021-11-21 01:00:47,142 INFO L226 Difference]: Without dead ends: 4714 [2021-11-21 01:00:47,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:00:47,164 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 917 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:47,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [987 Valid, 1844 Invalid, 2496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 01:00:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2021-11-21 01:00:47,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 4259. [2021-11-21 01:00:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 3033 states have (on average 1.5410484668644906) internal successors, (4674), 3186 states have internal predecessors, (4674), 945 states have call successors, (945), 211 states have call predecessors, (945), 280 states have return successors, (1110), 916 states have call predecessors, (1110), 940 states have call successors, (1110) [2021-11-21 01:00:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 6729 transitions. [2021-11-21 01:00:47,539 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 6729 transitions. Word has length 86 [2021-11-21 01:00:47,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:47,540 INFO L470 AbstractCegarLoop]: Abstraction has 4259 states and 6729 transitions. [2021-11-21 01:00:47,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-21 01:00:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 6729 transitions. [2021-11-21 01:00:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-21 01:00:47,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:47,545 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:00:47,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:00:47,545 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:47,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:47,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2133847790, now seen corresponding path program 1 times [2021-11-21 01:00:47,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:47,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121280987] [2021-11-21 01:00:47,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:47,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:00:47,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:47,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121280987] [2021-11-21 01:00:47,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121280987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:47,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:47,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:00:47,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541582144] [2021-11-21 01:00:47,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:47,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:00:47,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:00:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:00:47,718 INFO L87 Difference]: Start difference. First operand 4259 states and 6729 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:00:48,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:48,474 INFO L93 Difference]: Finished difference Result 4361 states and 6897 transitions. [2021-11-21 01:00:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:00:48,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 90 [2021-11-21 01:00:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:48,520 INFO L225 Difference]: With dead ends: 4361 [2021-11-21 01:00:48,521 INFO L226 Difference]: Without dead ends: 4346 [2021-11-21 01:00:48,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:00:48,527 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 623 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:48,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 1728 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:00:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-11-21 01:00:48,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4265. [2021-11-21 01:00:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4265 states, 3039 states have (on average 1.539980256663376) internal successors, (4680), 3192 states have internal predecessors, (4680), 945 states have call successors, (945), 211 states have call predecessors, (945), 280 states have return successors, (1110), 916 states have call predecessors, (1110), 940 states have call successors, (1110) [2021-11-21 01:00:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4265 states to 4265 states and 6735 transitions. [2021-11-21 01:00:48,905 INFO L78 Accepts]: Start accepts. Automaton has 4265 states and 6735 transitions. Word has length 90 [2021-11-21 01:00:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:48,909 INFO L470 AbstractCegarLoop]: Abstraction has 4265 states and 6735 transitions. [2021-11-21 01:00:48,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:00:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4265 states and 6735 transitions. [2021-11-21 01:00:48,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-21 01:00:48,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:48,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:48,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:00:48,916 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:48,918 INFO L85 PathProgramCache]: Analyzing trace with hash -633751993, now seen corresponding path program 1 times [2021-11-21 01:00:48,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:48,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001175977] [2021-11-21 01:00:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:48,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:00:49,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:49,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001175977] [2021-11-21 01:00:49,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001175977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:49,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:49,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:00:49,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966660574] [2021-11-21 01:00:49,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:49,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:00:49,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:00:49,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:49,160 INFO L87 Difference]: Start difference. First operand 4265 states and 6735 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-21 01:00:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:49,983 INFO L93 Difference]: Finished difference Result 4466 states and 7025 transitions. [2021-11-21 01:00:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:00:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2021-11-21 01:00:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:50,013 INFO L225 Difference]: With dead ends: 4466 [2021-11-21 01:00:50,013 INFO L226 Difference]: Without dead ends: 4451 [2021-11-21 01:00:50,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:00:50,018 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 587 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 2580 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:50,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 2580 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:00:50,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-11-21 01:00:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 4379. [2021-11-21 01:00:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 3117 states have (on average 1.5338466474173884) internal successors, (4781), 3270 states have internal predecessors, (4781), 969 states have call successors, (969), 223 states have call predecessors, (969), 292 states have return successors, (1151), 940 states have call predecessors, (1151), 964 states have call successors, (1151) [2021-11-21 01:00:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 6901 transitions. [2021-11-21 01:00:50,338 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 6901 transitions. Word has length 95 [2021-11-21 01:00:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:50,339 INFO L470 AbstractCegarLoop]: Abstraction has 4379 states and 6901 transitions. [2021-11-21 01:00:50,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-21 01:00:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 6901 transitions. [2021-11-21 01:00:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-21 01:00:50,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:50,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:50,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:00:50,345 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:50,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1760955271, now seen corresponding path program 1 times [2021-11-21 01:00:50,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:50,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242634739] [2021-11-21 01:00:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:50,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:00:50,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:50,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242634739] [2021-11-21 01:00:50,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242634739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:50,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:50,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-21 01:00:50,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370027075] [2021-11-21 01:00:50,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:50,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:00:50,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:50,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:00:50,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:00:50,663 INFO L87 Difference]: Start difference. First operand 4379 states and 6901 transitions. Second operand has 12 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-21 01:00:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:54,361 INFO L93 Difference]: Finished difference Result 5435 states and 8674 transitions. [2021-11-21 01:00:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:00:54,372 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 4 states have call successors, (19) Word has length 105 [2021-11-21 01:00:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:54,407 INFO L225 Difference]: With dead ends: 5435 [2021-11-21 01:00:54,407 INFO L226 Difference]: Without dead ends: 5150 [2021-11-21 01:00:54,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-11-21 01:00:54,416 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1756 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 4163 mSolverCounterSat, 808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 4971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 4163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:54,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1822 Valid, 2392 Invalid, 4971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [808 Valid, 4163 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-21 01:00:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-11-21 01:00:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 4821. [2021-11-21 01:00:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4821 states, 3435 states have (on average 1.5304221251819505) internal successors, (5257), 3602 states have internal predecessors, (5257), 1041 states have call successors, (1041), 259 states have call predecessors, (1041), 344 states have return successors, (1262), 1014 states have call predecessors, (1262), 1036 states have call successors, (1262) [2021-11-21 01:00:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4821 states to 4821 states and 7560 transitions. [2021-11-21 01:00:54,799 INFO L78 Accepts]: Start accepts. Automaton has 4821 states and 7560 transitions. Word has length 105 [2021-11-21 01:00:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:54,799 INFO L470 AbstractCegarLoop]: Abstraction has 4821 states and 7560 transitions. [2021-11-21 01:00:54,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 5 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-21 01:00:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4821 states and 7560 transitions. [2021-11-21 01:00:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-21 01:00:54,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:54,804 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:54,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:00:54,804 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash 555204384, now seen corresponding path program 1 times [2021-11-21 01:00:54,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:54,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064344655] [2021-11-21 01:00:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:54,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:00:54,946 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:54,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064344655] [2021-11-21 01:00:54,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064344655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:54,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:54,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:00:54,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189827951] [2021-11-21 01:00:54,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:54,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:00:54,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:54,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:00:54,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:00:54,949 INFO L87 Difference]: Start difference. First operand 4821 states and 7560 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:00:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:56,777 INFO L93 Difference]: Finished difference Result 13077 states and 20800 transitions. [2021-11-21 01:00:56,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:00:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 103 [2021-11-21 01:00:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:56,828 INFO L225 Difference]: With dead ends: 13077 [2021-11-21 01:00:56,828 INFO L226 Difference]: Without dead ends: 8288 [2021-11-21 01:00:56,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:56,858 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 1219 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:56,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 1366 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 01:00:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2021-11-21 01:00:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 7832. [2021-11-21 01:00:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7832 states, 5629 states have (on average 1.5301119204121514) internal successors, (8613), 5904 states have internal predecessors, (8613), 1644 states have call successors, (1644), 417 states have call predecessors, (1644), 558 states have return successors, (2084), 1590 states have call predecessors, (2084), 1639 states have call successors, (2084) [2021-11-21 01:00:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7832 states to 7832 states and 12341 transitions. [2021-11-21 01:00:57,439 INFO L78 Accepts]: Start accepts. Automaton has 7832 states and 12341 transitions. Word has length 103 [2021-11-21 01:00:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:57,440 INFO L470 AbstractCegarLoop]: Abstraction has 7832 states and 12341 transitions. [2021-11-21 01:00:57,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 01:00:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 7832 states and 12341 transitions. [2021-11-21 01:00:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-21 01:00:57,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:57,445 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:57,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:00:57,445 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:57,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:57,446 INFO L85 PathProgramCache]: Analyzing trace with hash 4025047, now seen corresponding path program 1 times [2021-11-21 01:00:57,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:57,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801217664] [2021-11-21 01:00:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:57,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:00:57,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:57,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801217664] [2021-11-21 01:00:57,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801217664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:57,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328679616] [2021-11-21 01:00:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:57,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:57,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:57,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:00:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:58,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-21 01:00:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:00:59,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:00:59,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328679616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:59,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:00:59,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 21 [2021-11-21 01:00:59,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213313856] [2021-11-21 01:00:59,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:59,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:00:59,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:59,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:00:59,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:00:59,201 INFO L87 Difference]: Start difference. First operand 7832 states and 12341 transitions. Second operand has 12 states, 8 states have (on average 7.875) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-21 01:01:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:02,119 INFO L93 Difference]: Finished difference Result 15609 states and 24924 transitions. [2021-11-21 01:01:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:01:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 7.875) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2021-11-21 01:01:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:02,163 INFO L225 Difference]: With dead ends: 15609 [2021-11-21 01:01:02,163 INFO L226 Difference]: Without dead ends: 7800 [2021-11-21 01:01:02,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-11-21 01:01:02,200 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 718 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 3766 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 4136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 3766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:02,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1184 Invalid, 4136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 3766 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 01:01:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-11-21 01:01:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 7651. [2021-11-21 01:01:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7651 states, 5509 states have (on average 1.5196950444726811) internal successors, (8372), 5783 states have internal predecessors, (8372), 1583 states have call successors, (1583), 417 states have call predecessors, (1583), 558 states have return successors, (2024), 1530 states have call predecessors, (2024), 1579 states have call successors, (2024) [2021-11-21 01:01:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7651 states to 7651 states and 11979 transitions. [2021-11-21 01:01:02,884 INFO L78 Accepts]: Start accepts. Automaton has 7651 states and 11979 transitions. Word has length 108 [2021-11-21 01:01:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:02,885 INFO L470 AbstractCegarLoop]: Abstraction has 7651 states and 11979 transitions. [2021-11-21 01:01:02,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 7.875) internal successors, (63), 10 states have internal predecessors, (63), 6 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-21 01:01:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 7651 states and 11979 transitions. [2021-11-21 01:01:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-21 01:01:02,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:02,891 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:02,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:03,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:01:03,106 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:03,106 INFO L85 PathProgramCache]: Analyzing trace with hash 124641749, now seen corresponding path program 1 times [2021-11-21 01:01:03,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:03,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575370247] [2021-11-21 01:01:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:03,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:01:03,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575370247] [2021-11-21 01:01:03,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575370247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:03,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:03,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:01:03,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651371766] [2021-11-21 01:01:03,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:03,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:03,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:03,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:03,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:01:03,302 INFO L87 Difference]: Start difference. First operand 7651 states and 11979 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-21 01:01:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:03,928 INFO L93 Difference]: Finished difference Result 7893 states and 12419 transitions. [2021-11-21 01:01:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:01:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 109 [2021-11-21 01:01:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:03,966 INFO L225 Difference]: With dead ends: 7893 [2021-11-21 01:01:03,967 INFO L226 Difference]: Without dead ends: 7879 [2021-11-21 01:01:03,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:01:03,971 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 47 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:03,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1609 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:01:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2021-11-21 01:01:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7677. [2021-11-21 01:01:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7677 states, 5535 states have (on average 1.5158084914182475) internal successors, (8390), 5809 states have internal predecessors, (8390), 1583 states have call successors, (1583), 417 states have call predecessors, (1583), 558 states have return successors, (2024), 1530 states have call predecessors, (2024), 1579 states have call successors, (2024) [2021-11-21 01:01:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 11997 transitions. [2021-11-21 01:01:04,540 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 11997 transitions. Word has length 109 [2021-11-21 01:01:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:04,540 INFO L470 AbstractCegarLoop]: Abstraction has 7677 states and 11997 transitions. [2021-11-21 01:01:04,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-21 01:01:04,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 11997 transitions. [2021-11-21 01:01:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-21 01:01:04,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:04,546 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:04,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:01:04,547 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:04,547 INFO L85 PathProgramCache]: Analyzing trace with hash -897565642, now seen corresponding path program 1 times [2021-11-21 01:01:04,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:04,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310270824] [2021-11-21 01:01:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:04,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:01:05,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:05,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310270824] [2021-11-21 01:01:05,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310270824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:05,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767896948] [2021-11-21 01:01:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:05,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:05,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:05,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:05,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6de4681-f2d8-471f-a75a-7fd477f7e5fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:01:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 2135 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-21 01:01:05,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:01:07,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:04:46,873 WARN L227 SmtUtils]: Spent 3.58m on a formula simplification. DAG size of input: 2881 DAG size of output: 101 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:08:23,412 WARN L227 SmtUtils]: Spent 3.59m on a formula simplification. DAG size of input: 2881 DAG size of output: 101 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:08:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 01:08:24,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767896948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:08:24,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525712997] [2021-11-21 01:08:24,440 INFO L159 IcfgInterpreter]: Started Sifa with 110 locations of interest [2021-11-21 01:08:24,441 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:08:24,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:08:24,450 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:08:24,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:09:50,426 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 453 for LOIs [2021-11-21 01:09:52,154 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 592 for LOIs