./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:58:50,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:58:50,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:58:50,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:58:50,767 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:58:50,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:58:50,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:58:50,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:58:50,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:58:50,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:58:50,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:58:50,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:58:50,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:58:50,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:58:50,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:58:50,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:58:50,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:58:50,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:58:50,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:58:50,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:58:50,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:58:50,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:58:50,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:58:50,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:58:50,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:58:50,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:58:50,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:58:50,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:58:50,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:58:50,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:58:50,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:58:50,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:58:50,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:58:50,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:58:50,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:58:50,845 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:58:50,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:58:50,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:58:50,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:58:50,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:58:50,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:58:50,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:58:50,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:58:50,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:58:50,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:58:50,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:58:50,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:58:50,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:58:50,879 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:58:50,879 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:58:50,879 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:58:50,879 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:58:50,880 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:58:50,880 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:58:50,880 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:58:50,880 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:58:50,880 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:58:50,881 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:58:50,881 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:58:50,881 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:58:50,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:58:50,882 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:58:50,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:58:50,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:58:50,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:58:50,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:58:50,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:58:50,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:58:50,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:58:50,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:58:50,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:58:50,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:58:50,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:58:50,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:58:50,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:58:50,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:58:50,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:58:50,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:58:50,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:58:50,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:58:50,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:58:50,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:58:50,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:58:50,886 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_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e942074e046d4b6eec963a95d600daf33500a37aba1da700aae37a309fea4cda [2021-11-23 02:58:51,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:58:51,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:58:51,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:58:51,244 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:58:51,245 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:58:51,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-23 02:58:51,316 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/data/3876d6760/542a5561dc68435381f644d493e7daab/FLAGeb785659b [2021-11-23 02:58:51,926 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:58:51,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c [2021-11-23 02:58:51,961 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/data/3876d6760/542a5561dc68435381f644d493e7daab/FLAGeb785659b [2021-11-23 02:58:52,154 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/data/3876d6760/542a5561dc68435381f644d493e7daab [2021-11-23 02:58:52,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:58:52,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:58:52,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:58:52,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:58:52,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:58:52,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:52" (1/1) ... [2021-11-23 02:58:52,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8058ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:52, skipping insertion in model container [2021-11-23 02:58:52,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:52" (1/1) ... [2021-11-23 02:58:52,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:58:52,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:58:52,809 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_05e7c66d-759e-45f8-86a4-a36b14398ff4/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-23 02:58:52,878 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:58:52,898 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:58:53,051 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_05e7c66d-759e-45f8-86a4-a36b14398ff4/sv-benchmarks/c/product-lines/elevator_spec2_product24.cil.c[63703,63716] [2021-11-23 02:58:53,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:58:53,107 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:58:53,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53 WrapperNode [2021-11-23 02:58:53,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:58:53,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:58:53,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:58:53,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:58:53,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,214 INFO L137 Inliner]: procedures = 98, calls = 353, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 937 [2021-11-23 02:58:53,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:58:53,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:58:53,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:58:53,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:58:53,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:58:53,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:58:53,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:58:53,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:58:53,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (1/1) ... [2021-11-23 02:58:53,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:58:53,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:58:53,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:58:53,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:58:53,504 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-23 02:58:53,505 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-23 02:58:53,505 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 02:58:53,505 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 02:58:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 02:58:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 02:58:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 02:58:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 02:58:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 02:58:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 02:58:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 02:58:53,507 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 02:58:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-23 02:58:53,507 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-23 02:58:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-23 02:58:53,508 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-23 02:58:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 02:58:53,508 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 02:58:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 02:58:53,508 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 02:58:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:58:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-23 02:58:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-23 02:58:53,509 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-23 02:58:53,509 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-23 02:58:53,510 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-23 02:58:53,510 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-23 02:58:53,510 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 02:58:53,511 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 02:58:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 02:58:53,511 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 02:58:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-23 02:58:53,511 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-23 02:58:53,512 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-23 02:58:53,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-23 02:58:53,512 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 02:58:53,512 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 02:58:53,512 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 02:58:53,513 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 02:58:53,513 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 02:58:53,513 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 02:58:53,513 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 02:58:53,514 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 02:58:53,514 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 02:58:53,515 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 02:58:53,515 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 02:58:53,516 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 02:58:53,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:58:53,517 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 02:58:53,518 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 02:58:53,519 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-23 02:58:53,519 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-23 02:58:53,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:58:53,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:58:53,520 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 02:58:53,521 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 02:58:53,521 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-23 02:58:53,521 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-23 02:58:53,732 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:58:53,735 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:58:54,954 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:58:55,599 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:58:55,599 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:58:55,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:55 BoogieIcfgContainer [2021-11-23 02:58:55,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:58:55,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:58:55,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:58:55,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:58:55,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:58:52" (1/3) ... [2021-11-23 02:58:55,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed3d7b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:55, skipping insertion in model container [2021-11-23 02:58:55,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:53" (2/3) ... [2021-11-23 02:58:55,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed3d7b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:55, skipping insertion in model container [2021-11-23 02:58:55,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:55" (3/3) ... [2021-11-23 02:58:55,611 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product24.cil.c [2021-11-23 02:58:55,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:58:55,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:58:55,706 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:58:55,713 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:58:55,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:58:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-23 02:58:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:58:55,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:55,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:55,755 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:55,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:55,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059780, now seen corresponding path program 1 times [2021-11-23 02:58:55,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:55,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065406968] [2021-11-23 02:58:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:55,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:58:56,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065406968] [2021-11-23 02:58:56,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065406968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:58:56,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:58:56,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:58:56,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808211222] [2021-11-23 02:58:56,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:56,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:58:56,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:56,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:58:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:58:56,306 INFO L87 Difference]: Start difference. First operand has 406 states, 272 states have (on average 1.5735294117647058) internal successors, (428), 295 states have internal predecessors, (428), 105 states have call successors, (105), 27 states have call predecessors, (105), 27 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:58:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:56,557 INFO L93 Difference]: Finished difference Result 424 states and 665 transitions. [2021-11-23 02:58:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:58:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2021-11-23 02:58:56,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:56,592 INFO L225 Difference]: With dead ends: 424 [2021-11-23 02:58:56,592 INFO L226 Difference]: Without dead ends: 402 [2021-11-23 02:58:56,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:58:56,601 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:56,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 593 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:58:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-23 02:58:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2021-11-23 02:58:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 270 states have (on average 1.5629629629629629) internal successors, (422), 291 states have internal predecessors, (422), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-23 02:58:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 627 transitions. [2021-11-23 02:58:56,702 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 627 transitions. Word has length 43 [2021-11-23 02:58:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:56,704 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 627 transitions. [2021-11-23 02:58:56,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:58:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 627 transitions. [2021-11-23 02:58:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:58:56,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:56,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:56,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:58:56,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:56,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1857954273, now seen corresponding path program 1 times [2021-11-23 02:58:56,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:56,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460655210] [2021-11-23 02:58:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:56,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:58:56,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:56,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460655210] [2021-11-23 02:58:56,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460655210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:58:56,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:58:56,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:58:56,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552492104] [2021-11-23 02:58:56,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:56,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:58:56,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:56,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:58:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:58:56,964 INFO L87 Difference]: Start difference. First operand 402 states and 627 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 02:58:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:58:59,366 INFO L93 Difference]: Finished difference Result 1312 states and 2089 transitions. [2021-11-23 02:58:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:58:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2021-11-23 02:58:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:58:59,396 INFO L225 Difference]: With dead ends: 1312 [2021-11-23 02:58:59,396 INFO L226 Difference]: Without dead ends: 926 [2021-11-23 02:58:59,406 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 [2021-11-23 02:58:59,407 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 1277 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:58:59,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 1260 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:58:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-11-23 02:58:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 839. [2021-11-23 02:58:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 586 states have (on average 1.5853242320819112) internal successors, (929), 616 states have internal predecessors, (929), 204 states have call successors, (204), 47 states have call predecessors, (204), 48 states have return successors, (206), 188 states have call predecessors, (206), 199 states have call successors, (206) [2021-11-23 02:58:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1339 transitions. [2021-11-23 02:58:59,595 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1339 transitions. Word has length 44 [2021-11-23 02:58:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:58:59,600 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 1339 transitions. [2021-11-23 02:58:59,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 02:58:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1339 transitions. [2021-11-23 02:58:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-23 02:58:59,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:58:59,615 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:58:59,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:58:59,615 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:58:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:58:59,624 INFO L85 PathProgramCache]: Analyzing trace with hash -5833543, now seen corresponding path program 1 times [2021-11-23 02:58:59,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:58:59,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270114880] [2021-11-23 02:58:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:58:59,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:58:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:58:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:58:59,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270114880] [2021-11-23 02:58:59,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270114880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:58:59,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:58:59,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:58:59,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967718258] [2021-11-23 02:58:59,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:58:59,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:58:59,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:58:59,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:58:59,914 INFO L87 Difference]: Start difference. First operand 839 states and 1339 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:59:02,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:02,569 INFO L93 Difference]: Finished difference Result 2617 states and 4223 transitions. [2021-11-23 02:59:02,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:59:02,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2021-11-23 02:59:02,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:02,599 INFO L225 Difference]: With dead ends: 2617 [2021-11-23 02:59:02,600 INFO L226 Difference]: Without dead ends: 1795 [2021-11-23 02:59:02,610 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 [2021-11-23 02:59:02,622 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 1198 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2416 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 2416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:02,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1281 Valid, 1969 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 2416 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:59:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2021-11-23 02:59:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1708. [2021-11-23 02:59:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1203 states have (on average 1.5901911886949294) internal successors, (1913), 1259 states have internal predecessors, (1913), 406 states have call successors, (406), 91 states have call predecessors, (406), 98 states have return successors, (433), 381 states have call predecessors, (433), 401 states have call successors, (433) [2021-11-23 02:59:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 2752 transitions. [2021-11-23 02:59:02,875 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 2752 transitions. Word has length 88 [2021-11-23 02:59:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:02,876 INFO L470 AbstractCegarLoop]: Abstraction has 1708 states and 2752 transitions. [2021-11-23 02:59:02,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:59:02,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 2752 transitions. [2021-11-23 02:59:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:59:02,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:02,884 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:02,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:59:02,884 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1071408980, now seen corresponding path program 1 times [2021-11-23 02:59:02,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:02,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395924602] [2021-11-23 02:59:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:02,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:59:03,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:03,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395924602] [2021-11-23 02:59:03,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395924602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:03,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:03,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:59:03,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801678319] [2021-11-23 02:59:03,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:03,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:59:03,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:03,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:59:03,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:59:03,084 INFO L87 Difference]: Start difference. First operand 1708 states and 2752 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:04,660 INFO L93 Difference]: Finished difference Result 4570 states and 7439 transitions. [2021-11-23 02:59:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:59:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 92 [2021-11-23 02:59:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:04,694 INFO L225 Difference]: With dead ends: 4570 [2021-11-23 02:59:04,694 INFO L226 Difference]: Without dead ends: 2878 [2021-11-23 02:59:04,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:04,711 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 1214 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:04,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1292 Valid, 989 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:59:04,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2021-11-23 02:59:04,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2670. [2021-11-23 02:59:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2670 states, 1886 states have (on average 1.5853658536585367) internal successors, (2990), 1976 states have internal predecessors, (2990), 628 states have call successors, (628), 136 states have call predecessors, (628), 155 states have return successors, (698), 590 states have call predecessors, (698), 623 states have call successors, (698) [2021-11-23 02:59:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2670 states to 2670 states and 4316 transitions. [2021-11-23 02:59:04,974 INFO L78 Accepts]: Start accepts. Automaton has 2670 states and 4316 transitions. Word has length 92 [2021-11-23 02:59:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:04,974 INFO L470 AbstractCegarLoop]: Abstraction has 2670 states and 4316 transitions. [2021-11-23 02:59:04,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2670 states and 4316 transitions. [2021-11-23 02:59:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 02:59:04,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:04,980 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:04,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:59:04,981 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:04,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:04,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1146352079, now seen corresponding path program 1 times [2021-11-23 02:59:04,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:04,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316409954] [2021-11-23 02:59:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:04,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:59:05,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:05,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316409954] [2021-11-23 02:59:05,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316409954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:05,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:05,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:59:05,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800273080] [2021-11-23 02:59:05,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:05,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:59:05,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:59:05,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:59:05,112 INFO L87 Difference]: Start difference. First operand 2670 states and 4316 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:06,848 INFO L93 Difference]: Finished difference Result 7385 states and 12078 transitions. [2021-11-23 02:59:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:59:06,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2021-11-23 02:59:06,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:06,904 INFO L225 Difference]: With dead ends: 7385 [2021-11-23 02:59:06,905 INFO L226 Difference]: Without dead ends: 4732 [2021-11-23 02:59:06,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:06,934 INFO L933 BasicCegarLoop]: 599 mSDtfsCounter, 1201 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:06,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 998 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 02:59:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2021-11-23 02:59:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4487. [2021-11-23 02:59:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4487 states, 3180 states have (on average 1.5839622641509434) internal successors, (5037), 3345 states have internal predecessors, (5037), 1038 states have call successors, (1038), 226 states have call predecessors, (1038), 268 states have return successors, (1206), 970 states have call predecessors, (1206), 1033 states have call successors, (1206) [2021-11-23 02:59:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4487 states to 4487 states and 7281 transitions. [2021-11-23 02:59:07,411 INFO L78 Accepts]: Start accepts. Automaton has 4487 states and 7281 transitions. Word has length 93 [2021-11-23 02:59:07,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:07,412 INFO L470 AbstractCegarLoop]: Abstraction has 4487 states and 7281 transitions. [2021-11-23 02:59:07,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:07,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4487 states and 7281 transitions. [2021-11-23 02:59:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:59:07,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:07,417 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:07,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:59:07,418 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1177464266, now seen corresponding path program 1 times [2021-11-23 02:59:07,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:07,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227990710] [2021-11-23 02:59:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:07,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:59:07,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:07,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227990710] [2021-11-23 02:59:07,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227990710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:07,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:07,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:59:07,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042482036] [2021-11-23 02:59:07,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:07,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:59:07,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:59:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:59:07,614 INFO L87 Difference]: Start difference. First operand 4487 states and 7281 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:09,604 INFO L93 Difference]: Finished difference Result 12879 states and 21274 transitions. [2021-11-23 02:59:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:59:09,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2021-11-23 02:59:09,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:09,692 INFO L225 Difference]: With dead ends: 12879 [2021-11-23 02:59:09,693 INFO L226 Difference]: Without dead ends: 8411 [2021-11-23 02:59:09,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:09,735 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 1188 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1264 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:09,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1264 Valid, 1007 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 02:59:09,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8411 states. [2021-11-23 02:59:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8411 to 8073. [2021-11-23 02:59:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 5729 states have (on average 1.5805550706929656) internal successors, (9055), 6050 states have internal predecessors, (9055), 1843 states have call successors, (1843), 406 states have call predecessors, (1843), 500 states have return successors, (2303), 1715 states have call predecessors, (2303), 1838 states have call successors, (2303) [2021-11-23 02:59:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 13201 transitions. [2021-11-23 02:59:10,520 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 13201 transitions. Word has length 94 [2021-11-23 02:59:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:10,521 INFO L470 AbstractCegarLoop]: Abstraction has 8073 states and 13201 transitions. [2021-11-23 02:59:10,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 13201 transitions. [2021-11-23 02:59:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:59:10,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:10,537 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:10,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:59:10,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:10,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:10,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1667709777, now seen corresponding path program 1 times [2021-11-23 02:59:10,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:10,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216579350] [2021-11-23 02:59:10,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:10,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:59:10,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:10,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216579350] [2021-11-23 02:59:10,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216579350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:10,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:10,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:59:10,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444022170] [2021-11-23 02:59:10,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:10,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:59:10,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:10,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:59:10,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:59:10,735 INFO L87 Difference]: Start difference. First operand 8073 states and 13201 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-23 02:59:15,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:15,182 INFO L93 Difference]: Finished difference Result 22285 states and 36668 transitions. [2021-11-23 02:59:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:59:15,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 94 [2021-11-23 02:59:15,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:15,297 INFO L225 Difference]: With dead ends: 22285 [2021-11-23 02:59:15,298 INFO L226 Difference]: Without dead ends: 14228 [2021-11-23 02:59:15,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:59:15,355 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 1420 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 4286 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 5053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 4286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:15,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 2555 Invalid, 5053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 4286 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 02:59:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14228 states. [2021-11-23 02:59:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14228 to 13248. [2021-11-23 02:59:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13248 states, 9158 states have (on average 1.5521948023585936) internal successors, (14215), 9753 states have internal predecessors, (14215), 3240 states have call successors, (3240), 648 states have call predecessors, (3240), 849 states have return successors, (4043), 3026 states have call predecessors, (4043), 3235 states have call successors, (4043) [2021-11-23 02:59:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 21498 transitions. [2021-11-23 02:59:16,474 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 21498 transitions. Word has length 94 [2021-11-23 02:59:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:16,475 INFO L470 AbstractCegarLoop]: Abstraction has 13248 states and 21498 transitions. [2021-11-23 02:59:16,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-23 02:59:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 21498 transitions. [2021-11-23 02:59:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:59:16,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:16,481 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:16,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:59:16,481 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:16,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:16,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2141938157, now seen corresponding path program 1 times [2021-11-23 02:59:16,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:16,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215865099] [2021-11-23 02:59:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:16,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:59:16,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:16,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215865099] [2021-11-23 02:59:16,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215865099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:16,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:16,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:59:16,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561317772] [2021-11-23 02:59:16,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:16,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:59:16,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:16,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:59:16,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:59:16,799 INFO L87 Difference]: Start difference. First operand 13248 states and 21498 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:19,546 INFO L93 Difference]: Finished difference Result 38937 states and 65412 transitions. [2021-11-23 02:59:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:59:19,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2021-11-23 02:59:19,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:19,711 INFO L225 Difference]: With dead ends: 38937 [2021-11-23 02:59:19,711 INFO L226 Difference]: Without dead ends: 25712 [2021-11-23 02:59:19,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:19,772 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 1175 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:19,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1250 Valid, 1019 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 02:59:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25712 states. [2021-11-23 02:59:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25712 to 24877. [2021-11-23 02:59:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24877 states, 17185 states have (on average 1.546755891766075) internal successors, (26581), 18388 states have internal predecessors, (26581), 6026 states have call successors, (6026), 1224 states have call predecessors, (6026), 1665 states have return successors, (8481), 5604 states have call predecessors, (8481), 6021 states have call successors, (8481) [2021-11-23 02:59:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24877 states to 24877 states and 41088 transitions. [2021-11-23 02:59:21,918 INFO L78 Accepts]: Start accepts. Automaton has 24877 states and 41088 transitions. Word has length 95 [2021-11-23 02:59:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:21,919 INFO L470 AbstractCegarLoop]: Abstraction has 24877 states and 41088 transitions. [2021-11-23 02:59:21,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:21,919 INFO L276 IsEmpty]: Start isEmpty. Operand 24877 states and 41088 transitions. [2021-11-23 02:59:21,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 02:59:21,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:21,925 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:21,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:59:21,926 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1975853800, now seen corresponding path program 1 times [2021-11-23 02:59:21,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:21,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785450442] [2021-11-23 02:59:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:21,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:59:22,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:22,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785450442] [2021-11-23 02:59:22,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785450442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:22,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:22,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:59:22,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974143326] [2021-11-23 02:59:22,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:22,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:59:22,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:59:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:59:22,073 INFO L87 Difference]: Start difference. First operand 24877 states and 41088 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:25,838 INFO L93 Difference]: Finished difference Result 74343 states and 130208 transitions. [2021-11-23 02:59:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:59:25,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2021-11-23 02:59:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:26,213 INFO L225 Difference]: With dead ends: 74343 [2021-11-23 02:59:26,213 INFO L226 Difference]: Without dead ends: 49487 [2021-11-23 02:59:26,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:26,356 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 1184 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:26,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1258 Valid, 1013 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:59:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49487 states. [2021-11-23 02:59:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49487 to 47626. [2021-11-23 02:59:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47626 states, 32892 states have (on average 1.543506019700839) internal successors, (50769), 35263 states have internal predecessors, (50769), 11489 states have call successors, (11489), 2372 states have call predecessors, (11489), 3244 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2021-11-23 02:59:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47626 states to 47626 states and 80900 transitions. [2021-11-23 02:59:30,526 INFO L78 Accepts]: Start accepts. Automaton has 47626 states and 80900 transitions. Word has length 96 [2021-11-23 02:59:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:30,527 INFO L470 AbstractCegarLoop]: Abstraction has 47626 states and 80900 transitions. [2021-11-23 02:59:30,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:59:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 47626 states and 80900 transitions. [2021-11-23 02:59:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 02:59:30,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:30,540 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:30,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:59:30,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:30,541 INFO L85 PathProgramCache]: Analyzing trace with hash -142606781, now seen corresponding path program 1 times [2021-11-23 02:59:30,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:30,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749767460] [2021-11-23 02:59:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:30,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 02:59:30,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749767460] [2021-11-23 02:59:30,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749767460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:30,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:59:30,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:59:30,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307589982] [2021-11-23 02:59:30,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:30,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:59:30,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:30,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:59:30,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:59:30,945 INFO L87 Difference]: Start difference. First operand 47626 states and 80900 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:59:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:34,118 INFO L93 Difference]: Finished difference Result 96918 states and 169438 transitions. [2021-11-23 02:59:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:59:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 144 [2021-11-23 02:59:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:34,746 INFO L225 Difference]: With dead ends: 96918 [2021-11-23 02:59:34,746 INFO L226 Difference]: Without dead ends: 49309 [2021-11-23 02:59:34,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:59:34,929 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 30 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1756 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:34,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1756 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:59:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49309 states. [2021-11-23 02:59:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49309 to 47824. [2021-11-23 02:59:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47824 states, 33090 states have (on average 1.5402538531278331) internal successors, (50967), 35461 states have internal predecessors, (50967), 11489 states have call successors, (11489), 2372 states have call predecessors, (11489), 3244 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2021-11-23 02:59:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47824 states to 47824 states and 81098 transitions. [2021-11-23 02:59:38,438 INFO L78 Accepts]: Start accepts. Automaton has 47824 states and 81098 transitions. Word has length 144 [2021-11-23 02:59:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:38,439 INFO L470 AbstractCegarLoop]: Abstraction has 47824 states and 81098 transitions. [2021-11-23 02:59:38,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:59:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 47824 states and 81098 transitions. [2021-11-23 02:59:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-23 02:59:38,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:38,455 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:38,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:59:38,456 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1322395032, now seen corresponding path program 1 times [2021-11-23 02:59:38,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:38,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532455333] [2021-11-23 02:59:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:38,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-23 02:59:38,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532455333] [2021-11-23 02:59:38,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532455333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:59:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183758223] [2021-11-23 02:59:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:38,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:59:38,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:59:38,749 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:59:38,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:59:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:39,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:59:39,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:59:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 02:59:39,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:59:39,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183758223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:39,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:59:39,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-23 02:59:39,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938277760] [2021-11-23 02:59:39,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:39,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:59:39,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:39,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:59:39,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:59:39,639 INFO L87 Difference]: Start difference. First operand 47824 states and 81098 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:59:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:43,693 INFO L93 Difference]: Finished difference Result 98205 states and 173002 transitions. [2021-11-23 02:59:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:59:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 151 [2021-11-23 02:59:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:44,063 INFO L225 Difference]: With dead ends: 98205 [2021-11-23 02:59:44,064 INFO L226 Difference]: Without dead ends: 50398 [2021-11-23 02:59:44,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:59:44,679 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 213 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:44,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1548 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:59:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50398 states. [2021-11-23 02:59:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50398 to 50398. [2021-11-23 02:59:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50398 states, 35598 states have (on average 1.5670824203606943) internal successors, (55785), 37969 states have internal predecessors, (55785), 11489 states have call successors, (11489), 2438 states have call predecessors, (11489), 3310 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2021-11-23 02:59:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50398 states to 50398 states and 85916 transitions. [2021-11-23 02:59:48,933 INFO L78 Accepts]: Start accepts. Automaton has 50398 states and 85916 transitions. Word has length 151 [2021-11-23 02:59:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:48,934 INFO L470 AbstractCegarLoop]: Abstraction has 50398 states and 85916 transitions. [2021-11-23 02:59:48,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:59:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 50398 states and 85916 transitions. [2021-11-23 02:59:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:59:48,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:48,950 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:48,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 02:59:49,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:59:49,173 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash 661444700, now seen corresponding path program 1 times [2021-11-23 02:59:49,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:49,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38595456] [2021-11-23 02:59:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:49,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 02:59:49,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:49,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38595456] [2021-11-23 02:59:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38595456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:59:49,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139887264] [2021-11-23 02:59:49,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:49,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:59:49,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:59:49,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:59:49,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:59:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:49,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 2085 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:59:49,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:59:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:59:50,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:59:50,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139887264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:50,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:59:50,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:59:50,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713864220] [2021-11-23 02:59:50,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:50,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:59:50,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:59:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:59:50,170 INFO L87 Difference]: Start difference. First operand 50398 states and 85916 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:59:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:53,639 INFO L93 Difference]: Finished difference Result 103353 states and 182374 transitions. [2021-11-23 02:59:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:59:53,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 156 [2021-11-23 02:59:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:53,937 INFO L225 Difference]: With dead ends: 103353 [2021-11-23 02:59:53,938 INFO L226 Difference]: Without dead ends: 52972 [2021-11-23 02:59:54,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:59:54,191 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 211 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:54,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1548 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:59:54,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52972 states. [2021-11-23 02:59:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52972 to 52972. [2021-11-23 02:59:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52972 states, 38106 states have (on average 1.5903794678003464) internal successors, (60603), 40477 states have internal predecessors, (60603), 11489 states have call successors, (11489), 2504 states have call predecessors, (11489), 3376 states have return successors, (18642), 10650 states have call predecessors, (18642), 11484 states have call successors, (18642) [2021-11-23 02:59:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52972 states to 52972 states and 90734 transitions. [2021-11-23 02:59:57,547 INFO L78 Accepts]: Start accepts. Automaton has 52972 states and 90734 transitions. Word has length 156 [2021-11-23 02:59:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:57,547 INFO L470 AbstractCegarLoop]: Abstraction has 52972 states and 90734 transitions. [2021-11-23 02:59:57,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:59:57,548 INFO L276 IsEmpty]: Start isEmpty. Operand 52972 states and 90734 transitions. [2021-11-23 02:59:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 02:59:57,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:57,566 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:59:57,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:59:57,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:59:57,792 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:57,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1967053732, now seen corresponding path program 1 times [2021-11-23 02:59:57,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:57,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839135762] [2021-11-23 02:59:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:57,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 02:59:57,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:57,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839135762] [2021-11-23 02:59:57,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839135762] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:59:57,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58824942] [2021-11-23 02:59:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:57,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:59:57,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:59:57,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:59:57,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05e7c66d-759e-45f8-86a4-a36b14398ff4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:59:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:58,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 2089 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:59:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:59:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:59:58,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:59:58,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58824942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:59:58,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:59:58,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 02:59:58,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773619238] [2021-11-23 02:59:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:59:58,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:59:58,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:59:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:59:58,710 INFO L87 Difference]: Start difference. First operand 52972 states and 90734 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 03:00:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:01,921 INFO L93 Difference]: Finished difference Result 108501 states and 191746 transitions. [2021-11-23 03:00:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:00:01,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 160 [2021-11-23 03:00:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:02,220 INFO L225 Difference]: With dead ends: 108501 [2021-11-23 03:00:02,220 INFO L226 Difference]: Without dead ends: 55546 [2021-11-23 03:00:02,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:00:02,401 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 209 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:00:02,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1548 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:00:02,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55546 states.