./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba --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 a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:11:55,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:11:55,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:11:55,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:11:55,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:11:55,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:11:55,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:11:55,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:11:55,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:11:55,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:11:55,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:11:55,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:11:55,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:11:55,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:11:55,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:11:55,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:11:55,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:11:55,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:11:55,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:11:55,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:11:55,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:11:55,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:11:55,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:11:55,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:11:55,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:11:55,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:11:55,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:11:55,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:11:55,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:11:55,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:11:55,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:11:55,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:11:55,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:11:55,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:11:55,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:11:55,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:11:55,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:11:55,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:11:55,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:11:55,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:11:55,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:11:55,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:11:55,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:11:55,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:11:55,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:11:55,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:11:55,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:11:55,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:11:55,975 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:11:55,975 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:11:55,975 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:11:55,976 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:11:55,976 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:11:55,976 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:11:55,976 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:11:55,976 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:11:55,976 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:11:55,977 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:11:55,977 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:11:55,977 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:11:55,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:11:55,978 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:11:55,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:11:55,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:11:55,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:11:55,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:11:55,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:11:55,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:11:55,979 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:11:55,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:11:55,980 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:11:55,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:11:55,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:11:55,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:11:55,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:11:55,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:11:55,981 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:11:55,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:11:55,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:11:55,981 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:11:55,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:11:55,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:11:55,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:11:55,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8dba55a6053d72f9111ac5cd147f9f45da0f79494b1facfa57c6480910007fb [2022-11-22 00:11:56,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:11:56,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:11:56,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:11:56,286 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:11:56,287 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:11:56,288 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2022-11-22 00:11:59,333 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:11:59,680 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:11:59,680 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c [2022-11-22 00:11:59,714 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/data/c05b94788/aaa2576e6db8438e8a54a6ddab470451/FLAG36252877a [2022-11-22 00:11:59,730 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/data/c05b94788/aaa2576e6db8438e8a54a6ddab470451 [2022-11-22 00:11:59,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:11:59,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:11:59,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:11:59,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:11:59,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:11:59,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:11:59" (1/1) ... [2022-11-22 00:11:59,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277c0cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:11:59, skipping insertion in model container [2022-11-22 00:11:59,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:11:59" (1/1) ... [2022-11-22 00:11:59,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:11:59,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:12:00,363 WARN L237 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_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2022-11-22 00:12:00,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:12:00,416 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:12:00,510 WARN L237 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_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/sv-benchmarks/c/product-lines/elevator_spec2_product31.cil.c[64450,64463] [2022-11-22 00:12:00,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:12:00,557 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:12:00,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00 WrapperNode [2022-11-22 00:12:00,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:12:00,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:12:00,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:12:00,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:12:00,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,702 INFO L138 Inliner]: procedures = 97, calls = 349, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 966 [2022-11-22 00:12:00,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:12:00,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:12:00,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:12:00,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:12:00,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,806 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:12:00,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:12:00,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:12:00,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:12:00,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (1/1) ... [2022-11-22 00:12:00,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:12:00,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:12:00,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:12:00,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:12:00,917 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 00:12:00,918 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 00:12:00,918 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 00:12:00,918 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 00:12:00,918 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 00:12:00,918 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 00:12:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 00:12:00,919 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-22 00:12:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 00:12:00,919 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 00:12:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 00:12:00,919 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 00:12:00,919 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 00:12:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 00:12:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 00:12:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 00:12:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 00:12:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 00:12:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 00:12:00,920 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 00:12:00,920 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 00:12:00,921 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 00:12:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:12:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-22 00:12:00,921 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-22 00:12:00,921 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 00:12:00,921 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 00:12:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 00:12:00,922 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 00:12:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 00:12:00,922 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 00:12:00,922 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 00:12:00,922 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 00:12:00,923 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 00:12:00,923 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 00:12:00,924 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 00:12:00,924 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 00:12:00,924 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 00:12:00,924 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 00:12:00,924 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 00:12:00,924 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 00:12:00,925 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 00:12:00,925 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 00:12:00,925 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 00:12:00,925 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 00:12:00,925 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 00:12:00,926 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 00:12:00,926 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 00:12:00,926 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 00:12:00,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:12:00,926 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 00:12:00,927 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 00:12:00,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:12:00,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:12:00,927 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 00:12:00,927 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 00:12:01,086 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:12:01,094 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:12:02,368 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:12:03,198 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:12:03,198 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 00:12:03,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:12:03 BoogieIcfgContainer [2022-11-22 00:12:03,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:12:03,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:12:03,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:12:03,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:12:03,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:11:59" (1/3) ... [2022-11-22 00:12:03,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e9ea3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:12:03, skipping insertion in model container [2022-11-22 00:12:03,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:12:00" (2/3) ... [2022-11-22 00:12:03,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e9ea3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:12:03, skipping insertion in model container [2022-11-22 00:12:03,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:12:03" (3/3) ... [2022-11-22 00:12:03,211 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product31.cil.c [2022-11-22 00:12:03,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:12:03,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:12:03,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:12:03,296 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@791490f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:12:03,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:12:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-22 00:12:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-22 00:12:03,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:03,325 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:12:03,326 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1461414302, now seen corresponding path program 1 times [2022-11-22 00:12:03,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:03,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725688584] [2022-11-22 00:12:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:03,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:12:03,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:03,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725688584] [2022-11-22 00:12:03,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725688584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:03,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:03,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:12:03,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846746025] [2022-11-22 00:12:03,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:03,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 00:12:03,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 00:12:03,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 00:12:03,952 INFO L87 Difference]: Start difference. First operand has 397 states, 267 states have (on average 1.5767790262172285) internal successors, (421), 288 states have internal predecessors, (421), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-22 00:12:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:04,182 INFO L93 Difference]: Finished difference Result 415 states and 652 transitions. [2022-11-22 00:12:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 00:12:04,188 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2022-11-22 00:12:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:04,212 INFO L225 Difference]: With dead ends: 415 [2022-11-22 00:12:04,215 INFO L226 Difference]: Without dead ends: 393 [2022-11-22 00:12:04,221 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:12:04,226 INFO L413 NwaCegarLoop]: 580 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, 580 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:04,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 580 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:12:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-22 00:12:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-11-22 00:12:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 265 states have (on average 1.5660377358490567) internal successors, (415), 284 states have internal predecessors, (415), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-22 00:12:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 614 transitions. [2022-11-22 00:12:04,339 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 614 transitions. Word has length 77 [2022-11-22 00:12:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:04,341 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 614 transitions. [2022-11-22 00:12:04,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-22 00:12:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 614 transitions. [2022-11-22 00:12:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-22 00:12:04,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:04,347 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:12:04,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:12:04,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash -305737627, now seen corresponding path program 1 times [2022-11-22 00:12:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:04,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961346356] [2022-11-22 00:12:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:12:04,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:04,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961346356] [2022-11-22 00:12:04,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961346356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:04,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:04,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:12:04,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769709155] [2022-11-22 00:12:04,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:04,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:12:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:12:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:12:04,915 INFO L87 Difference]: Start difference. First operand 393 states and 614 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 00:12:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:07,808 INFO L93 Difference]: Finished difference Result 1210 states and 1921 transitions. [2022-11-22 00:12:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:12:07,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2022-11-22 00:12:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:07,841 INFO L225 Difference]: With dead ends: 1210 [2022-11-22 00:12:07,841 INFO L226 Difference]: Without dead ends: 833 [2022-11-22 00:12:07,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:12:07,847 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1209 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:07,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 1606 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 2667 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 00:12:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-11-22 00:12:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2022-11-22 00:12:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 537 states have (on average 1.5772811918063314) internal successors, (847), 570 states have internal predecessors, (847), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-11-22 00:12:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1244 transitions. [2022-11-22 00:12:07,920 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1244 transitions. Word has length 78 [2022-11-22 00:12:07,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:07,921 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1244 transitions. [2022-11-22 00:12:07,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-22 00:12:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1244 transitions. [2022-11-22 00:12:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 00:12:07,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:07,925 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:12:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:12:07,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1407431251, now seen corresponding path program 1 times [2022-11-22 00:12:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:07,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156964667] [2022-11-22 00:12:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:07,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:12:08,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:08,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156964667] [2022-11-22 00:12:08,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156964667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:08,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:08,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:12:08,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315289547] [2022-11-22 00:12:08,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:08,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:12:08,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:08,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:12:08,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:12:08,238 INFO L87 Difference]: Start difference. First operand 784 states and 1244 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 00:12:08,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:08,955 INFO L93 Difference]: Finished difference Result 855 states and 1356 transitions. [2022-11-22 00:12:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-11-22 00:12:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:08,963 INFO L225 Difference]: With dead ends: 855 [2022-11-22 00:12:08,963 INFO L226 Difference]: Without dead ends: 840 [2022-11-22 00:12:08,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:12:08,966 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 708 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:08,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 1900 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:12:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-22 00:12:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 788. [2022-11-22 00:12:09,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5730129390018484) internal successors, (851), 574 states have internal predecessors, (851), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-11-22 00:12:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1248 transitions. [2022-11-22 00:12:09,032 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1248 transitions. Word has length 82 [2022-11-22 00:12:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:09,032 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1248 transitions. [2022-11-22 00:12:09,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-22 00:12:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1248 transitions. [2022-11-22 00:12:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 00:12:09,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:09,036 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:12:09,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:12:09,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:09,037 INFO L85 PathProgramCache]: Analyzing trace with hash 96265248, now seen corresponding path program 1 times [2022-11-22 00:12:09,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:09,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212716376] [2022-11-22 00:12:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:09,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:12:09,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:09,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212716376] [2022-11-22 00:12:09,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212716376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:09,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:09,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:12:09,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128966752] [2022-11-22 00:12:09,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:09,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:12:09,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:09,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:12:09,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:12:09,240 INFO L87 Difference]: Start difference. First operand 788 states and 1248 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 00:12:09,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:09,413 INFO L93 Difference]: Finished difference Result 807 states and 1272 transitions. [2022-11-22 00:12:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:12:09,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2022-11-22 00:12:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:09,427 INFO L225 Difference]: With dead ends: 807 [2022-11-22 00:12:09,427 INFO L226 Difference]: Without dead ends: 792 [2022-11-22 00:12:09,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:12:09,440 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 30 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2278 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:09,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2278 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:12:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-11-22 00:12:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 788. [2022-11-22 00:12:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 541 states have (on average 1.5693160813308689) internal successors, (849), 574 states have internal predecessors, (849), 198 states have call successors, (198), 48 states have call predecessors, (198), 48 states have return successors, (199), 190 states have call predecessors, (199), 193 states have call successors, (199) [2022-11-22 00:12:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1246 transitions. [2022-11-22 00:12:09,523 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1246 transitions. Word has length 87 [2022-11-22 00:12:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:09,524 INFO L495 AbstractCegarLoop]: Abstraction has 788 states and 1246 transitions. [2022-11-22 00:12:09,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-22 00:12:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1246 transitions. [2022-11-22 00:12:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 00:12:09,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:09,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 00:12:09,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:12:09,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash 351092467, now seen corresponding path program 1 times [2022-11-22 00:12:09,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:09,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619258300] [2022-11-22 00:12:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:09,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:12:09,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:09,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619258300] [2022-11-22 00:12:09,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619258300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:09,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:09,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:12:09,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916573008] [2022-11-22 00:12:09,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:09,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:09,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:09,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:09,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:12:09,832 INFO L87 Difference]: Start difference. First operand 788 states and 1246 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) [2022-11-22 00:12:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:11,550 INFO L93 Difference]: Finished difference Result 2521 states and 4055 transitions. [2022-11-22 00:12:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:11,551 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 94 [2022-11-22 00:12:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:11,566 INFO L225 Difference]: With dead ends: 2521 [2022-11-22 00:12:11,566 INFO L226 Difference]: Without dead ends: 1749 [2022-11-22 00:12:11,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:12:11,576 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 1220 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:11,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1298 Valid, 706 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 00:12:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-11-22 00:12:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1583. [2022-11-22 00:12:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1109 states have (on average 1.5807033363390441) internal successors, (1753), 1172 states have internal predecessors, (1753), 381 states have call successors, (381), 87 states have call predecessors, (381), 92 states have return successors, (399), 359 states have call predecessors, (399), 376 states have call successors, (399) [2022-11-22 00:12:11,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2533 transitions. [2022-11-22 00:12:11,721 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2533 transitions. Word has length 94 [2022-11-22 00:12:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:11,722 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 2533 transitions. [2022-11-22 00:12:11,722 INFO L496 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) [2022-11-22 00:12:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2533 transitions. [2022-11-22 00:12:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 00:12:11,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:11,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 00:12:11,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:12:11,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2001184935, now seen corresponding path program 1 times [2022-11-22 00:12:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098210232] [2022-11-22 00:12:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:12:12,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:12,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098210232] [2022-11-22 00:12:12,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098210232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:12,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:12,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:12:12,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430174241] [2022-11-22 00:12:12,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:12,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:12,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:12,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:12,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:12:12,008 INFO L87 Difference]: Start difference. First operand 1583 states and 2533 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) [2022-11-22 00:12:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:13,886 INFO L93 Difference]: Finished difference Result 4838 states and 7859 transitions. [2022-11-22 00:12:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:13,887 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 95 [2022-11-22 00:12:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:13,909 INFO L225 Difference]: With dead ends: 4838 [2022-11-22 00:12:13,909 INFO L226 Difference]: Without dead ends: 3274 [2022-11-22 00:12:13,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:12:13,918 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1211 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1288 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:13,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1288 Valid, 710 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 00:12:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3274 states. [2022-11-22 00:12:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3274 to 3061. [2022-11-22 00:12:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 2167 states have (on average 1.5874480849100139) internal successors, (3440), 2297 states have internal predecessors, (3440), 710 states have call successors, (710), 165 states have call predecessors, (710), 183 states have return successors, (788), 660 states have call predecessors, (788), 705 states have call successors, (788) [2022-11-22 00:12:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 4938 transitions. [2022-11-22 00:12:14,222 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 4938 transitions. Word has length 95 [2022-11-22 00:12:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:14,224 INFO L495 AbstractCegarLoop]: Abstraction has 3061 states and 4938 transitions. [2022-11-22 00:12:14,224 INFO L496 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) [2022-11-22 00:12:14,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 4938 transitions. [2022-11-22 00:12:14,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-22 00:12:14,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:14,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 00:12:14,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:12:14,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1907336459, now seen corresponding path program 1 times [2022-11-22 00:12:14,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:14,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038315021] [2022-11-22 00:12:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:14,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:12:14,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:14,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038315021] [2022-11-22 00:12:14,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038315021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:14,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:14,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:12:14,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235994973] [2022-11-22 00:12:14,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:14,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:14,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:12:14,532 INFO L87 Difference]: Start difference. First operand 3061 states and 4938 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) [2022-11-22 00:12:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:16,624 INFO L93 Difference]: Finished difference Result 9314 states and 15343 transitions. [2022-11-22 00:12:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:16,625 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 96 [2022-11-22 00:12:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:16,674 INFO L225 Difference]: With dead ends: 9314 [2022-11-22 00:12:16,675 INFO L226 Difference]: Without dead ends: 6278 [2022-11-22 00:12:16,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:12:16,700 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 1194 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:16,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1270 Valid, 723 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 00:12:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2022-11-22 00:12:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 5962. [2022-11-22 00:12:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5962 states, 4238 states have (on average 1.5875412930627655) internal successors, (6728), 4508 states have internal predecessors, (6728), 1352 states have call successors, (1352), 321 states have call predecessors, (1352), 371 states have return successors, (1642), 1246 states have call predecessors, (1642), 1347 states have call successors, (1642) [2022-11-22 00:12:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5962 states to 5962 states and 9722 transitions. [2022-11-22 00:12:17,444 INFO L78 Accepts]: Start accepts. Automaton has 5962 states and 9722 transitions. Word has length 96 [2022-11-22 00:12:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:17,444 INFO L495 AbstractCegarLoop]: Abstraction has 5962 states and 9722 transitions. [2022-11-22 00:12:17,444 INFO L496 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) [2022-11-22 00:12:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5962 states and 9722 transitions. [2022-11-22 00:12:17,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-22 00:12:17,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:17,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 00:12:17,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:12:17,449 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:17,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1001970203, now seen corresponding path program 1 times [2022-11-22 00:12:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:17,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656969117] [2022-11-22 00:12:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:12:17,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:17,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656969117] [2022-11-22 00:12:17,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656969117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:17,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:17,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:12:17,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877868478] [2022-11-22 00:12:17,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:12:17,668 INFO L87 Difference]: Start difference. First operand 5962 states and 9722 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) [2022-11-22 00:12:20,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:20,279 INFO L93 Difference]: Finished difference Result 18119 states and 30598 transitions. [2022-11-22 00:12:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:20,280 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 97 [2022-11-22 00:12:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:20,380 INFO L225 Difference]: With dead ends: 18119 [2022-11-22 00:12:20,381 INFO L226 Difference]: Without dead ends: 12194 [2022-11-22 00:12:20,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:12:20,421 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1181 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:20,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1256 Valid, 735 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 00:12:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12194 states. [2022-11-22 00:12:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12194 to 11663. [2022-11-22 00:12:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11663 states, 8297 states have (on average 1.5841870555622515) internal successors, (13144), 8859 states have internal predecessors, (13144), 2606 states have call successors, (2606), 633 states have call predecessors, (2606), 759 states have return successors, (3648), 2388 states have call predecessors, (3648), 2601 states have call successors, (3648) [2022-11-22 00:12:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11663 states to 11663 states and 19398 transitions. [2022-11-22 00:12:21,731 INFO L78 Accepts]: Start accepts. Automaton has 11663 states and 19398 transitions. Word has length 97 [2022-11-22 00:12:21,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:21,732 INFO L495 AbstractCegarLoop]: Abstraction has 11663 states and 19398 transitions. [2022-11-22 00:12:21,733 INFO L496 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) [2022-11-22 00:12:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 11663 states and 19398 transitions. [2022-11-22 00:12:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-22 00:12:21,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:21,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:12:21,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:12:21,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:21,741 INFO L85 PathProgramCache]: Analyzing trace with hash 996167415, now seen corresponding path program 1 times [2022-11-22 00:12:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:21,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370462844] [2022-11-22 00:12:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:21,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 00:12:21,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:21,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370462844] [2022-11-22 00:12:21,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370462844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:21,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:21,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:12:21,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968623659] [2022-11-22 00:12:21,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:21,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:21,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:12:21,998 INFO L87 Difference]: Start difference. First operand 11663 states and 19398 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-22 00:12:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:25,475 INFO L93 Difference]: Finished difference Result 35520 states and 62814 transitions. [2022-11-22 00:12:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:25,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 98 [2022-11-22 00:12:25,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:25,624 INFO L225 Difference]: With dead ends: 35520 [2022-11-22 00:12:25,624 INFO L226 Difference]: Without dead ends: 23908 [2022-11-22 00:12:25,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:12:25,691 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1172 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:25,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1246 Valid, 749 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 00:12:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23908 states. [2022-11-22 00:12:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23908 to 22836. [2022-11-22 00:12:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22836 states, 16271 states have (on average 1.582631675987954) internal successors, (25751), 17395 states have internal predecessors, (25751), 5054 states have call successors, (5054), 1255 states have call predecessors, (5054), 1510 states have return successors, (8491), 4611 states have call predecessors, (8491), 5049 states have call successors, (8491) [2022-11-22 00:12:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22836 states to 22836 states and 39296 transitions. [2022-11-22 00:12:28,956 INFO L78 Accepts]: Start accepts. Automaton has 22836 states and 39296 transitions. Word has length 98 [2022-11-22 00:12:28,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:28,957 INFO L495 AbstractCegarLoop]: Abstraction has 22836 states and 39296 transitions. [2022-11-22 00:12:28,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-11-22 00:12:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 22836 states and 39296 transitions. [2022-11-22 00:12:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-22 00:12:28,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:28,977 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:12:28,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:12:28,977 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1756232201, now seen corresponding path program 1 times [2022-11-22 00:12:28,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:28,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505999674] [2022-11-22 00:12:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:28,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-22 00:12:29,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:29,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505999674] [2022-11-22 00:12:29,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505999674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:29,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:12:29,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:12:29,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239205522] [2022-11-22 00:12:29,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:29,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:29,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:12:29,208 INFO L87 Difference]: Start difference. First operand 22836 states and 39296 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2022-11-22 00:12:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:31,657 INFO L93 Difference]: Finished difference Result 48931 states and 87571 transitions. [2022-11-22 00:12:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:31,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 146 [2022-11-22 00:12:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:31,923 INFO L225 Difference]: With dead ends: 48931 [2022-11-22 00:12:31,923 INFO L226 Difference]: Without dead ends: 26112 [2022-11-22 00:12:32,014 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:12:32,015 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 116 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1818 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:32,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1818 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:12:32,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26112 states. [2022-11-22 00:12:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26112 to 23076. [2022-11-22 00:12:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23076 states, 16494 states have (on average 1.5776039772038317) internal successors, (26021), 17602 states have internal predecessors, (26021), 5071 states have call successors, (5071), 1255 states have call predecessors, (5071), 1510 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-22 00:12:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23076 states to 23076 states and 39600 transitions. [2022-11-22 00:12:34,531 INFO L78 Accepts]: Start accepts. Automaton has 23076 states and 39600 transitions. Word has length 146 [2022-11-22 00:12:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:34,531 INFO L495 AbstractCegarLoop]: Abstraction has 23076 states and 39600 transitions. [2022-11-22 00:12:34,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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) [2022-11-22 00:12:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 23076 states and 39600 transitions. [2022-11-22 00:12:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-22 00:12:34,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:34,541 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2022-11-22 00:12:34,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 00:12:34,541 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:34,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1535464535, now seen corresponding path program 1 times [2022-11-22 00:12:34,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:34,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050487616] [2022-11-22 00:12:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:34,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-22 00:12:36,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:36,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050487616] [2022-11-22 00:12:36,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050487616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:12:36,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627604120] [2022-11-22 00:12:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:36,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:12:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:12:36,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:12:36,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:12:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:12:36,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:12:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 00:12:36,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:12:36,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627604120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:36,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:12:36,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 17 [2022-11-22 00:12:36,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555626657] [2022-11-22 00:12:36,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:36,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:36,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:36,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:12:36,996 INFO L87 Difference]: Start difference. First operand 23076 states and 39600 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2022-11-22 00:12:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:39,047 INFO L93 Difference]: Finished difference Result 48631 states and 86786 transitions. [2022-11-22 00:12:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:39,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 153 [2022-11-22 00:12:39,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:39,218 INFO L225 Difference]: With dead ends: 48631 [2022-11-22 00:12:39,219 INFO L226 Difference]: Without dead ends: 25572 [2022-11-22 00:12:39,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-22 00:12:39,361 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 213 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:39,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1506 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:12:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25572 states. [2022-11-22 00:12:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25572 to 25572. [2022-11-22 00:12:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25572 states, 18926 states have (on average 1.6217372926133362) internal successors, (30693), 20034 states have internal predecessors, (30693), 5071 states have call successors, (5071), 1319 states have call predecessors, (5071), 1574 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-22 00:12:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25572 states to 25572 states and 44272 transitions. [2022-11-22 00:12:42,077 INFO L78 Accepts]: Start accepts. Automaton has 25572 states and 44272 transitions. Word has length 153 [2022-11-22 00:12:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:42,080 INFO L495 AbstractCegarLoop]: Abstraction has 25572 states and 44272 transitions. [2022-11-22 00:12:42,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2022-11-22 00:12:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 25572 states and 44272 transitions. [2022-11-22 00:12:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-22 00:12:42,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:42,095 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2022-11-22 00:12:42,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:12:42,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:12:42,316 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:42,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1573789320, now seen corresponding path program 1 times [2022-11-22 00:12:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:42,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782810] [2022-11-22 00:12:42,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:42,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-22 00:12:42,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:42,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782810] [2022-11-22 00:12:42,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:12:42,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658346032] [2022-11-22 00:12:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:42,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:12:42,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:12:42,586 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:12:42,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:12:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:43,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:12:43,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:12:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 00:12:43,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:12:43,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658346032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:43,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:12:43,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 00:12:43,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729502313] [2022-11-22 00:12:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:43,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:43,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:12:43,082 INFO L87 Difference]: Start difference. First operand 25572 states and 44272 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2022-11-22 00:12:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:45,692 INFO L93 Difference]: Finished difference Result 53623 states and 96064 transitions. [2022-11-22 00:12:45,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:45,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 158 [2022-11-22 00:12:45,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:45,800 INFO L225 Difference]: With dead ends: 53623 [2022-11-22 00:12:45,800 INFO L226 Difference]: Without dead ends: 28068 [2022-11-22 00:12:45,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:12:45,909 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 211 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1506 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 [2022-11-22 00:12:45,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1506 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:12:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28068 states. [2022-11-22 00:12:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28068 to 28068. [2022-11-22 00:12:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28068 states, 21358 states have (on average 1.6558198333177263) internal successors, (35365), 22466 states have internal predecessors, (35365), 5071 states have call successors, (5071), 1383 states have call predecessors, (5071), 1638 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-22 00:12:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28068 states to 28068 states and 48944 transitions. [2022-11-22 00:12:48,181 INFO L78 Accepts]: Start accepts. Automaton has 28068 states and 48944 transitions. Word has length 158 [2022-11-22 00:12:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:48,184 INFO L495 AbstractCegarLoop]: Abstraction has 28068 states and 48944 transitions. [2022-11-22 00:12:48,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2022-11-22 00:12:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 28068 states and 48944 transitions. [2022-11-22 00:12:48,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-22 00:12:48,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:48,196 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:12:48,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:12:48,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:12:48,404 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash -321044888, now seen corresponding path program 1 times [2022-11-22 00:12:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:48,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968380193] [2022-11-22 00:12:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:48,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-22 00:12:50,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:50,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968380193] [2022-11-22 00:12:50,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968380193] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:12:50,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145155417] [2022-11-22 00:12:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:50,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:12:50,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:12:50,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:12:50,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:12:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1879 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:12:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:12:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:12:51,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:12:51,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145155417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:51,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:12:51,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-11-22 00:12:51,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745669199] [2022-11-22 00:12:51,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:51,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:51,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:51,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:51,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:12:51,351 INFO L87 Difference]: Start difference. First operand 28068 states and 48944 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-11-22 00:12:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:12:53,699 INFO L93 Difference]: Finished difference Result 58615 states and 105342 transitions. [2022-11-22 00:12:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:12:53,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 162 [2022-11-22 00:12:53,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:12:53,797 INFO L225 Difference]: With dead ends: 58615 [2022-11-22 00:12:53,797 INFO L226 Difference]: Without dead ends: 30564 [2022-11-22 00:12:53,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:12:53,864 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 209 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:12:53,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1506 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:12:53,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30564 states. [2022-11-22 00:12:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30564 to 30564. [2022-11-22 00:12:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30564 states, 23790 states have (on average 1.6829340058848257) internal successors, (40037), 24898 states have internal predecessors, (40037), 5071 states have call successors, (5071), 1447 states have call predecessors, (5071), 1702 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-22 00:12:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30564 states to 30564 states and 53616 transitions. [2022-11-22 00:12:55,788 INFO L78 Accepts]: Start accepts. Automaton has 30564 states and 53616 transitions. Word has length 162 [2022-11-22 00:12:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:12:55,789 INFO L495 AbstractCegarLoop]: Abstraction has 30564 states and 53616 transitions. [2022-11-22 00:12:55,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-11-22 00:12:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 30564 states and 53616 transitions. [2022-11-22 00:12:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-22 00:12:55,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:12:55,798 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:12:55,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:12:56,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:12:56,006 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:12:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:12:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1282711703, now seen corresponding path program 1 times [2022-11-22 00:12:56,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:12:56,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419288726] [2022-11-22 00:12:56,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:12:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-22 00:12:58,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419288726] [2022-11-22 00:12:58,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419288726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:12:58,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186772825] [2022-11-22 00:12:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:12:58,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:12:58,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:12:58,459 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:12:58,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:12:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 1882 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:12:58,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:12:59,000 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 00:12:59,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:12:59,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186772825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:12:59,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:12:59,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-11-22 00:12:59,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706517607] [2022-11-22 00:12:59,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:12:59,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:12:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:12:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:12:59,003 INFO L87 Difference]: Start difference. First operand 30564 states and 53616 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2022-11-22 00:13:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:00,931 INFO L93 Difference]: Finished difference Result 63607 states and 114620 transitions. [2022-11-22 00:13:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:13:00,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 165 [2022-11-22 00:13:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:01,043 INFO L225 Difference]: With dead ends: 63607 [2022-11-22 00:13:01,043 INFO L226 Difference]: Without dead ends: 33060 [2022-11-22 00:13:01,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:13:01,110 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 207 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:01,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1506 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:13:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33060 states. [2022-11-22 00:13:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33060 to 33060. [2022-11-22 00:13:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33060 states, 26222 states have (on average 1.7050186865990389) internal successors, (44709), 27330 states have internal predecessors, (44709), 5071 states have call successors, (5071), 1511 states have call predecessors, (5071), 1766 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-22 00:13:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33060 states to 33060 states and 58288 transitions. [2022-11-22 00:13:03,627 INFO L78 Accepts]: Start accepts. Automaton has 33060 states and 58288 transitions. Word has length 165 [2022-11-22 00:13:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:03,628 INFO L495 AbstractCegarLoop]: Abstraction has 33060 states and 58288 transitions. [2022-11-22 00:13:03,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2022-11-22 00:13:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 33060 states and 58288 transitions. [2022-11-22 00:13:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-22 00:13:03,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:03,637 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:13:03,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:13:03,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:13:03,845 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:03,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:03,846 INFO L85 PathProgramCache]: Analyzing trace with hash -284020391, now seen corresponding path program 1 times [2022-11-22 00:13:03,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:03,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069587511] [2022-11-22 00:13:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-22 00:13:05,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:05,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069587511] [2022-11-22 00:13:05,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069587511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:13:05,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434235143] [2022-11-22 00:13:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:05,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:05,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:13:05,987 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:13:06,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:13:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:13:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:13:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-22 00:13:06,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:13:06,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434235143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:06,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:13:06,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-11-22 00:13:06,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730026245] [2022-11-22 00:13:06,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:06,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:13:06,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:13:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:13:06,506 INFO L87 Difference]: Start difference. First operand 33060 states and 58288 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-11-22 00:13:08,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:13:08,548 INFO L93 Difference]: Finished difference Result 68599 states and 123898 transitions. [2022-11-22 00:13:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:13:08,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 167 [2022-11-22 00:13:08,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:13:08,655 INFO L225 Difference]: With dead ends: 68599 [2022-11-22 00:13:08,656 INFO L226 Difference]: Without dead ends: 35556 [2022-11-22 00:13:08,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:13:08,721 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 205 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1506 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:13:08,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1506 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:13:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35556 states. [2022-11-22 00:13:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35556 to 35556. [2022-11-22 00:13:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35556 states, 28654 states have (on average 1.7233545054791652) internal successors, (49381), 29762 states have internal predecessors, (49381), 5071 states have call successors, (5071), 1575 states have call predecessors, (5071), 1830 states have return successors, (8508), 4628 states have call predecessors, (8508), 5066 states have call successors, (8508) [2022-11-22 00:13:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35556 states to 35556 states and 62960 transitions. [2022-11-22 00:13:10,572 INFO L78 Accepts]: Start accepts. Automaton has 35556 states and 62960 transitions. Word has length 167 [2022-11-22 00:13:10,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:13:10,573 INFO L495 AbstractCegarLoop]: Abstraction has 35556 states and 62960 transitions. [2022-11-22 00:13:10,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-11-22 00:13:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 35556 states and 62960 transitions. [2022-11-22 00:13:10,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-22 00:13:10,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:13:10,581 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:13:10,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:13:10,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 00:13:10,790 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:13:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:13:10,790 INFO L85 PathProgramCache]: Analyzing trace with hash 300551816, now seen corresponding path program 1 times [2022-11-22 00:13:10,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:13:10,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597192366] [2022-11-22 00:13:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:10,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:13:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-22 00:13:12,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:13:12,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597192366] [2022-11-22 00:13:12,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597192366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:13:12,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847180775] [2022-11-22 00:13:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:13:12,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:13:12,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:13:12,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:13:12,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1bc0d73-88b3-4b8d-becd-12e84357ea8b/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:13:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:13:13,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1881 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 00:13:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:13:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-22 00:13:13,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:13:13,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847180775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:13:13,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:13:13,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-11-22 00:13:13,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256157193] [2022-11-22 00:13:13,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:13:13,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:13:13,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:13:13,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:13:13,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:13:13,413 INFO L87 Difference]: Start difference. First operand 35556 states and 62960 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25)