./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh --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 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 --- 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-2329fc7 [2022-12-14 05:10:56,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:10:56,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:10:56,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:10:56,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:10:56,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:10:56,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:10:56,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:10:56,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:10:56,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:10:56,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:10:56,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:10:56,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:10:56,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:10:56,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:10:56,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:10:56,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:10:56,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:10:56,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:10:56,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:10:56,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:10:56,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:10:56,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:10:56,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:10:56,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:10:56,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:10:56,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:10:56,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:10:56,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:10:56,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:10:56,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:10:56,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:10:56,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:10:56,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:10:56,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:10:56,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:10:56,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:10:56,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:10:56,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:10:56,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:10:56,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:10:56,929 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:10:56,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:10:56,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:10:56,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:10:56,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:10:56,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:10:56,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:10:56,945 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:10:56,945 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:10:56,945 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:10:56,946 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:10:56,946 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:10:56,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:10:56,946 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:10:56,946 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:10:56,946 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:10:56,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:10:56,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:10:56,947 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:10:56,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:10:56,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:10:56,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:10:56,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:10:56,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:10:56,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:10:56,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:10:56,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:10:56,948 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:10:56,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:10:56,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:10:56,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:10:56,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:10:56,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:10:56,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:10:56,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:10:56,949 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:10:56,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:10:56,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:10:56,949 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:10:56,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:10:56,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:10:56,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:10:56,950 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_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e63e44256bba8522bf99795cd1238c2e8ad8456659e8a545df838f8f88bd318 [2022-12-14 05:10:57,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:10:57,183 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:10:57,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:10:57,186 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:10:57,186 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:10:57,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2022-12-14 05:10:59,763 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:10:59,952 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:10:59,952 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c [2022-12-14 05:10:59,963 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/data/24854df2d/05b4a44e0f0b45e4aa951ada0adb305c/FLAGcf6a2b422 [2022-12-14 05:10:59,973 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/data/24854df2d/05b4a44e0f0b45e4aa951ada0adb305c [2022-12-14 05:10:59,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:10:59,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:10:59,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:10:59,977 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:10:59,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:10:59,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:10:59" (1/1) ... [2022-12-14 05:10:59,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230a7fbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:10:59, skipping insertion in model container [2022-12-14 05:10:59,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:10:59" (1/1) ... [2022-12-14 05:10:59,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:11:00,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:11:00,267 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_1950a6c1-f518-44a2-9544-12885868c32d/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2022-12-14 05:11:00,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:11:00,327 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:11:00,373 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_1950a6c1-f518-44a2-9544-12885868c32d/sv-benchmarks/c/product-lines/elevator_spec3_product01.cil.c[40412,40425] [2022-12-14 05:11:00,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:11:00,448 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:11:00,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00 WrapperNode [2022-12-14 05:11:00,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:11:00,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:11:00,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:11:00,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:11:00,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,514 INFO L138 Inliner]: procedures = 86, calls = 334, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 750 [2022-12-14 05:11:00,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:11:00,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:11:00,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:11:00,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:11:00,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,559 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:11:00,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:11:00,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:11:00,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:11:00,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (1/1) ... [2022-12-14 05:11:00,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:11:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:00,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:11:00,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:11:00,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:11:00,631 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 05:11:00,632 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 05:11:00,632 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 05:11:00,632 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 05:11:00,632 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 05:11:00,632 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 05:11:00,632 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 05:11:00,633 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 05:11:00,633 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 05:11:00,633 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 05:11:00,633 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 05:11:00,633 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 05:11:00,633 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 05:11:00,633 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 05:11:00,634 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 05:11:00,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 05:11:00,634 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 05:11:00,634 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 05:11:00,634 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 05:11:00,634 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 05:11:00,634 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 05:11:00,634 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 05:11:00,635 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 05:11:00,635 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 05:11:00,635 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 05:11:00,635 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 05:11:00,635 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 05:11:00,635 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 05:11:00,636 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 05:11:00,636 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 05:11:00,636 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 05:11:00,636 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 05:11:00,636 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 05:11:00,636 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 05:11:00,636 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 05:11:00,637 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 05:11:00,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:11:00,637 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 05:11:00,637 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 05:11:00,637 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 05:11:00,637 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 05:11:00,637 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 05:11:00,637 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 05:11:00,638 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 05:11:00,638 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 05:11:00,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:11:00,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:11:00,638 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 05:11:00,638 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 05:11:00,750 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:11:00,752 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:11:01,481 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:11:01,959 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:11:01,959 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 05:11:01,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:11:01 BoogieIcfgContainer [2022-12-14 05:11:01,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:11:01,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:11:01,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:11:01,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:11:01,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:10:59" (1/3) ... [2022-12-14 05:11:01,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d44aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:11:01, skipping insertion in model container [2022-12-14 05:11:01,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:11:00" (2/3) ... [2022-12-14 05:11:01,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d44aa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:11:01, skipping insertion in model container [2022-12-14 05:11:01,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:11:01" (3/3) ... [2022-12-14 05:11:01,972 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2022-12-14 05:11:01,990 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:11:01,990 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:11:02,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:11:02,037 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;@7157fa09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:11:02,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:11:02,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2022-12-14 05:11:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 05:11:02,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:02,053 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 05:11:02,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:02,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1129266766, now seen corresponding path program 1 times [2022-12-14 05:11:02,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11884816] [2022-12-14 05:11:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:11:02,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:02,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11884816] [2022-12-14 05:11:02,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11884816] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:02,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259285118] [2022-12-14 05:11:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:02,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:02,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:02,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:02,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:11:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:02,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1504 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:11:02,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:11:02,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:02,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259285118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:02,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:02,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 05:11:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949521425] [2022-12-14 05:11:02,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:02,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:02,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:02,990 INFO L87 Difference]: Start difference. First operand has 377 states, 254 states have (on average 1.5984251968503937) internal successors, (406), 272 states have internal predecessors, (406), 98 states have call successors, (98), 23 states have call predecessors, (98), 23 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:11:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:03,242 INFO L93 Difference]: Finished difference Result 1056 states and 1713 transitions. [2022-12-14 05:11:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-12-14 05:11:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:03,260 INFO L225 Difference]: With dead ends: 1056 [2022-12-14 05:11:03,260 INFO L226 Difference]: Without dead ends: 681 [2022-12-14 05:11:03,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:03,270 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 552 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:03,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1121 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:11:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-12-14 05:11:03,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 669. [2022-12-14 05:11:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 456 states have (on average 1.5921052631578947) internal successors, (726), 487 states have internal predecessors, (726), 172 states have call successors, (172), 41 states have call predecessors, (172), 40 states have return successors, (174), 166 states have call predecessors, (174), 169 states have call successors, (174) [2022-12-14 05:11:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1072 transitions. [2022-12-14 05:11:03,372 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1072 transitions. Word has length 63 [2022-12-14 05:11:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:03,373 INFO L495 AbstractCegarLoop]: Abstraction has 669 states and 1072 transitions. [2022-12-14 05:11:03,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 05:11:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1072 transitions. [2022-12-14 05:11:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 05:11:03,377 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:03,377 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 05:11:03,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:11:03,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 05:11:03,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 933667468, now seen corresponding path program 1 times [2022-12-14 05:11:03,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:03,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345274504] [2022-12-14 05:11:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:03,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:03,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:11:03,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:03,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345274504] [2022-12-14 05:11:03,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345274504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:03,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:11:03,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:11:03,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626878349] [2022-12-14 05:11:03,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:03,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:11:03,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:03,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:11:03,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:11:03,770 INFO L87 Difference]: Start difference. First operand 669 states and 1072 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 05:11:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:04,060 INFO L93 Difference]: Finished difference Result 1528 states and 2495 transitions. [2022-12-14 05:11:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:11:04,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 64 [2022-12-14 05:11:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:04,067 INFO L225 Difference]: With dead ends: 1528 [2022-12-14 05:11:04,068 INFO L226 Difference]: Without dead ends: 871 [2022-12-14 05:11:04,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:11:04,073 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 210 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:04,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 2275 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:11:04,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-12-14 05:11:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 673. [2022-12-14 05:11:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 460 states have (on average 1.5869565217391304) internal successors, (730), 491 states have internal predecessors, (730), 172 states have call successors, (172), 41 states have call predecessors, (172), 40 states have return successors, (174), 166 states have call predecessors, (174), 169 states have call successors, (174) [2022-12-14 05:11:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1076 transitions. [2022-12-14 05:11:04,123 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1076 transitions. Word has length 64 [2022-12-14 05:11:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:04,123 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 1076 transitions. [2022-12-14 05:11:04,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-14 05:11:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1076 transitions. [2022-12-14 05:11:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 05:11:04,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:04,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:04,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:11:04,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash -78413645, now seen corresponding path program 1 times [2022-12-14 05:11:04,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:04,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421600455] [2022-12-14 05:11:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:04,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:11:04,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421600455] [2022-12-14 05:11:04,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421600455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724043322] [2022-12-14 05:11:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:04,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:04,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:04,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:04,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:11:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:04,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 05:11:04,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:11:04,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:04,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724043322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:04,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:04,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 05:11:04,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422166702] [2022-12-14 05:11:04,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:04,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:04,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:04,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:04,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:11:04,679 INFO L87 Difference]: Start difference. First operand 673 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 05:11:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:04,914 INFO L93 Difference]: Finished difference Result 1917 states and 3100 transitions. [2022-12-14 05:11:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:04,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2022-12-14 05:11:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:04,921 INFO L225 Difference]: With dead ends: 1917 [2022-12-14 05:11:04,921 INFO L226 Difference]: Without dead ends: 1256 [2022-12-14 05:11:04,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:11:04,925 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 471 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:04,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1156 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:11:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-12-14 05:11:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1236. [2022-12-14 05:11:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 841 states have (on average 1.5422116527942924) internal successors, (1297), 901 states have internal predecessors, (1297), 321 states have call successors, (321), 76 states have call predecessors, (321), 73 states have return successors, (340), 308 states have call predecessors, (340), 317 states have call successors, (340) [2022-12-14 05:11:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1958 transitions. [2022-12-14 05:11:05,005 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1958 transitions. Word has length 68 [2022-12-14 05:11:05,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:05,006 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 1958 transitions. [2022-12-14 05:11:05,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 05:11:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1958 transitions. [2022-12-14 05:11:05,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 05:11:05,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:05,009 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:05,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:11:05,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 05:11:05,210 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:05,211 INFO L85 PathProgramCache]: Analyzing trace with hash -644137624, now seen corresponding path program 1 times [2022-12-14 05:11:05,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:05,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477279782] [2022-12-14 05:11:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:05,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:11:05,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:05,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477279782] [2022-12-14 05:11:05,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477279782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:05,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748094712] [2022-12-14 05:11:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:05,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:05,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:05,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:05,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:11:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:05,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:11:05,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:11:05,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:05,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748094712] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:05,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:05,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-12-14 05:11:05,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3305475] [2022-12-14 05:11:05,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:05,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:11:05,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:11:05,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:05,840 INFO L87 Difference]: Start difference. First operand 1236 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 05:11:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:06,358 INFO L93 Difference]: Finished difference Result 2177 states and 3426 transitions. [2022-12-14 05:11:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:11:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2022-12-14 05:11:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:06,363 INFO L225 Difference]: With dead ends: 2177 [2022-12-14 05:11:06,363 INFO L226 Difference]: Without dead ends: 1394 [2022-12-14 05:11:06,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:11:06,367 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 533 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:06,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 1773 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:11:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-12-14 05:11:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1380. [2022-12-14 05:11:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 957 states have (on average 1.5245559038662486) internal successors, (1459), 1019 states have internal predecessors, (1459), 339 states have call successors, (339), 84 states have call predecessors, (339), 83 states have return successors, (360), 326 states have call predecessors, (360), 335 states have call successors, (360) [2022-12-14 05:11:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2158 transitions. [2022-12-14 05:11:06,422 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2158 transitions. Word has length 72 [2022-12-14 05:11:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:06,422 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2158 transitions. [2022-12-14 05:11:06,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 05:11:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2158 transitions. [2022-12-14 05:11:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 05:11:06,424 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:06,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:06,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:11:06,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:06,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:06,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1428151693, now seen corresponding path program 1 times [2022-12-14 05:11:06,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:06,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315219507] [2022-12-14 05:11:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:06,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:11:06,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:06,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315219507] [2022-12-14 05:11:06,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315219507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:06,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91812444] [2022-12-14 05:11:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:06,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:06,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:06,957 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:06,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:11:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:11:07,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:11:07,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:07,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91812444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:07,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:07,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 05:11:07,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772009684] [2022-12-14 05:11:07,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:07,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:11:07,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:07,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:11:07,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:11:07,211 INFO L87 Difference]: Start difference. First operand 1380 states and 2158 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 05:11:07,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:07,425 INFO L93 Difference]: Finished difference Result 2565 states and 4059 transitions. [2022-12-14 05:11:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:11:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-12-14 05:11:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:07,430 INFO L225 Difference]: With dead ends: 2565 [2022-12-14 05:11:07,430 INFO L226 Difference]: Without dead ends: 1380 [2022-12-14 05:11:07,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:07,435 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 273 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:07,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1540 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:11:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2022-12-14 05:11:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1380. [2022-12-14 05:11:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 957 states have (on average 1.4869383490073145) internal successors, (1423), 1019 states have internal predecessors, (1423), 339 states have call successors, (339), 84 states have call predecessors, (339), 83 states have return successors, (360), 326 states have call predecessors, (360), 335 states have call successors, (360) [2022-12-14 05:11:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2122 transitions. [2022-12-14 05:11:07,509 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2122 transitions. Word has length 73 [2022-12-14 05:11:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:07,510 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2122 transitions. [2022-12-14 05:11:07,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 05:11:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2122 transitions. [2022-12-14 05:11:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 05:11:07,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:07,512 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:07,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:11:07,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:07,712 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:07,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2008015319, now seen corresponding path program 1 times [2022-12-14 05:11:07,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:07,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570120397] [2022-12-14 05:11:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:07,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:11:08,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:08,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570120397] [2022-12-14 05:11:08,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570120397] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:08,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158389899] [2022-12-14 05:11:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:08,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:08,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:08,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:08,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:11:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:08,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:11:08,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:11:08,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:11:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:11:08,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158389899] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:08,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:11:08,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 16 [2022-12-14 05:11:08,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922952082] [2022-12-14 05:11:08,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:08,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:11:08,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:08,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:11:08,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:11:08,596 INFO L87 Difference]: Start difference. First operand 1380 states and 2122 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:11:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:11,043 INFO L93 Difference]: Finished difference Result 3293 states and 5261 transitions. [2022-12-14 05:11:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 05:11:11,043 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 75 [2022-12-14 05:11:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:11,054 INFO L225 Difference]: With dead ends: 3293 [2022-12-14 05:11:11,054 INFO L226 Difference]: Without dead ends: 2511 [2022-12-14 05:11:11,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-12-14 05:11:11,058 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 2259 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 1014 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2338 SdHoareTripleChecker+Valid, 3175 SdHoareTripleChecker+Invalid, 3726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1014 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:11,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2338 Valid, 3175 Invalid, 3726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1014 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 05:11:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2022-12-14 05:11:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2419. [2022-12-14 05:11:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 1720 states have (on average 1.4924418604651162) internal successors, (2567), 1815 states have internal predecessors, (2567), 548 states have call successors, (548), 145 states have call predecessors, (548), 150 states have return successors, (656), 530 states have call predecessors, (656), 543 states have call successors, (656) [2022-12-14 05:11:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3771 transitions. [2022-12-14 05:11:11,155 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3771 transitions. Word has length 75 [2022-12-14 05:11:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:11,156 INFO L495 AbstractCegarLoop]: Abstraction has 2419 states and 3771 transitions. [2022-12-14 05:11:11,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 05:11:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3771 transitions. [2022-12-14 05:11:11,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 05:11:11,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:11,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:11,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:11:11,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:11,358 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash 690767649, now seen corresponding path program 1 times [2022-12-14 05:11:11,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:11,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184078680] [2022-12-14 05:11:11,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:11,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:11:11,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184078680] [2022-12-14 05:11:11,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184078680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937520448] [2022-12-14 05:11:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:11,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:11,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:11,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:11,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:11:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:11,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:11:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:11:11,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:11,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937520448] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:11,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:11,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 05:11:11,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598971563] [2022-12-14 05:11:11,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:11,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:11,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:11,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:11,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:11,798 INFO L87 Difference]: Start difference. First operand 2419 states and 3771 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 05:11:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:12,068 INFO L93 Difference]: Finished difference Result 5980 states and 9479 transitions. [2022-12-14 05:11:12,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:12,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2022-12-14 05:11:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:12,084 INFO L225 Difference]: With dead ends: 5980 [2022-12-14 05:11:12,084 INFO L226 Difference]: Without dead ends: 3573 [2022-12-14 05:11:12,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:12,094 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 522 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:12,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1280 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:11:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3573 states. [2022-12-14 05:11:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3573 to 3505. [2022-12-14 05:11:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3505 states, 2502 states have (on average 1.4900079936051158) internal successors, (3728), 2645 states have internal predecessors, (3728), 784 states have call successors, (784), 207 states have call predecessors, (784), 218 states have return successors, (955), 760 states have call predecessors, (955), 779 states have call successors, (955) [2022-12-14 05:11:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3505 states to 3505 states and 5467 transitions. [2022-12-14 05:11:12,250 INFO L78 Accepts]: Start accepts. Automaton has 3505 states and 5467 transitions. Word has length 75 [2022-12-14 05:11:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:12,251 INFO L495 AbstractCegarLoop]: Abstraction has 3505 states and 5467 transitions. [2022-12-14 05:11:12,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 05:11:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3505 states and 5467 transitions. [2022-12-14 05:11:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 05:11:12,254 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:12,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:12,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:11:12,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:12,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash 933660363, now seen corresponding path program 1 times [2022-12-14 05:11:12,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:12,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29183127] [2022-12-14 05:11:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:11:12,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29183127] [2022-12-14 05:11:12,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29183127] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052589785] [2022-12-14 05:11:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:12,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:12,745 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:12,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:11:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:12,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1543 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:11:12,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:11:12,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:12,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052589785] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:12,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:12,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 05:11:12,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761602664] [2022-12-14 05:11:12,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:12,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:11:12,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:11:12,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:11:12,999 INFO L87 Difference]: Start difference. First operand 3505 states and 5467 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 05:11:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:13,605 INFO L93 Difference]: Finished difference Result 7281 states and 11525 transitions. [2022-12-14 05:11:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:11:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-12-14 05:11:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:13,626 INFO L225 Difference]: With dead ends: 7281 [2022-12-14 05:11:13,626 INFO L226 Difference]: Without dead ends: 3788 [2022-12-14 05:11:13,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:11:13,643 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 569 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:13,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1889 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:11:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2022-12-14 05:11:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3420. [2022-12-14 05:11:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 2429 states have (on average 1.4804446274186909) internal successors, (3596), 2574 states have internal predecessors, (3596), 784 states have call successors, (784), 193 states have call predecessors, (784), 206 states have return successors, (1017), 748 states have call predecessors, (1017), 779 states have call successors, (1017) [2022-12-14 05:11:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 5397 transitions. [2022-12-14 05:11:13,825 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 5397 transitions. Word has length 76 [2022-12-14 05:11:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:13,826 INFO L495 AbstractCegarLoop]: Abstraction has 3420 states and 5397 transitions. [2022-12-14 05:11:13,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 05:11:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 5397 transitions. [2022-12-14 05:11:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 05:11:13,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:13,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:13,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:11:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 05:11:14,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:14,029 INFO L85 PathProgramCache]: Analyzing trace with hash -667586725, now seen corresponding path program 1 times [2022-12-14 05:11:14,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:14,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393096182] [2022-12-14 05:11:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:14,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:11:14,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393096182] [2022-12-14 05:11:14,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393096182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349794679] [2022-12-14 05:11:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:14,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:14,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:14,427 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:14,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:11:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 1558 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:11:14,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:11:14,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:14,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349794679] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:14,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:14,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-12-14 05:11:14,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708395121] [2022-12-14 05:11:14,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:14,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:11:14,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:14,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:11:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:14,741 INFO L87 Difference]: Start difference. First operand 3420 states and 5397 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 05:11:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:15,229 INFO L93 Difference]: Finished difference Result 6280 states and 9942 transitions. [2022-12-14 05:11:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:11:15,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) Word has length 79 [2022-12-14 05:11:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:15,242 INFO L225 Difference]: With dead ends: 6280 [2022-12-14 05:11:15,242 INFO L226 Difference]: Without dead ends: 3441 [2022-12-14 05:11:15,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:11:15,252 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 407 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 2539 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:15,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 2539 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:11:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2022-12-14 05:11:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 3424. [2022-12-14 05:11:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 2429 states have (on average 1.4804446274186909) internal successors, (3596), 2578 states have internal predecessors, (3596), 788 states have call successors, (788), 193 states have call predecessors, (788), 206 states have return successors, (1021), 748 states have call predecessors, (1021), 783 states have call successors, (1021) [2022-12-14 05:11:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 5405 transitions. [2022-12-14 05:11:15,389 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 5405 transitions. Word has length 79 [2022-12-14 05:11:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:15,390 INFO L495 AbstractCegarLoop]: Abstraction has 3424 states and 5405 transitions. [2022-12-14 05:11:15,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 05:11:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 5405 transitions. [2022-12-14 05:11:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 05:11:15,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:15,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:15,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:11:15,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:15,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash 779214768, now seen corresponding path program 1 times [2022-12-14 05:11:15,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:15,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764671654] [2022-12-14 05:11:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:15,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 05:11:15,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764671654] [2022-12-14 05:11:15,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764671654] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377585946] [2022-12-14 05:11:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:15,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:15,827 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:15,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:11:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:16,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:11:16,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 05:11:16,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:16,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377585946] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:16,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:16,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-12-14 05:11:16,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788702800] [2022-12-14 05:11:16,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:16,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:11:16,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:16,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:11:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:16,047 INFO L87 Difference]: Start difference. First operand 3424 states and 5405 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 05:11:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:16,291 INFO L93 Difference]: Finished difference Result 6597 states and 10654 transitions. [2022-12-14 05:11:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:11:16,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 99 [2022-12-14 05:11:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:16,316 INFO L225 Difference]: With dead ends: 6597 [2022-12-14 05:11:16,316 INFO L226 Difference]: Without dead ends: 3615 [2022-12-14 05:11:16,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:16,327 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 13 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2208 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:16,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2208 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:11:16,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2022-12-14 05:11:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3498. [2022-12-14 05:11:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 2479 states have (on average 1.4707543364259783) internal successors, (3646), 2637 states have internal predecessors, (3646), 792 states have call successors, (792), 193 states have call predecessors, (792), 226 states have return successors, (1143), 763 states have call predecessors, (1143), 787 states have call successors, (1143) [2022-12-14 05:11:16,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 5581 transitions. [2022-12-14 05:11:16,531 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 5581 transitions. Word has length 99 [2022-12-14 05:11:16,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:16,531 INFO L495 AbstractCegarLoop]: Abstraction has 3498 states and 5581 transitions. [2022-12-14 05:11:16,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 05:11:16,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 5581 transitions. [2022-12-14 05:11:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 05:11:16,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:16,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:16,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:11:16,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:16,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1881442963, now seen corresponding path program 1 times [2022-12-14 05:11:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:16,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612814850] [2022-12-14 05:11:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:16,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 05:11:17,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:17,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612814850] [2022-12-14 05:11:17,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612814850] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:17,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177133439] [2022-12-14 05:11:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:17,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:17,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:17,083 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:17,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:11:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:17,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:11:17,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:11:17,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:17,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177133439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:17,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:17,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-12-14 05:11:17,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478208557] [2022-12-14 05:11:17,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:17,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:11:17,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:17,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:11:17,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:11:17,364 INFO L87 Difference]: Start difference. First operand 3498 states and 5581 transitions. Second operand has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-12-14 05:11:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:19,396 INFO L93 Difference]: Finished difference Result 7783 states and 12613 transitions. [2022-12-14 05:11:19,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 05:11:19,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 117 [2022-12-14 05:11:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:19,423 INFO L225 Difference]: With dead ends: 7783 [2022-12-14 05:11:19,423 INFO L226 Difference]: Without dead ends: 4181 [2022-12-14 05:11:19,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-12-14 05:11:19,449 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1621 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 3646 mSolverCounterSat, 1061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 4707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1061 IncrementalHoareTripleChecker+Valid, 3646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:19,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 1518 Invalid, 4707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1061 Valid, 3646 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 05:11:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2022-12-14 05:11:19,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3493. [2022-12-14 05:11:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3493 states, 2474 states have (on average 1.471301535974131) internal successors, (3640), 2632 states have internal predecessors, (3640), 792 states have call successors, (792), 193 states have call predecessors, (792), 226 states have return successors, (1143), 763 states have call predecessors, (1143), 787 states have call successors, (1143) [2022-12-14 05:11:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5575 transitions. [2022-12-14 05:11:19,610 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5575 transitions. Word has length 117 [2022-12-14 05:11:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:19,611 INFO L495 AbstractCegarLoop]: Abstraction has 3493 states and 5575 transitions. [2022-12-14 05:11:19,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 5 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-12-14 05:11:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5575 transitions. [2022-12-14 05:11:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 05:11:19,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:19,615 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:19,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:11:19,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:19,816 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:19,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1890352939, now seen corresponding path program 1 times [2022-12-14 05:11:19,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:19,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154479293] [2022-12-14 05:11:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:19,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:11:20,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:20,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154479293] [2022-12-14 05:11:20,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154479293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:20,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843726659] [2022-12-14 05:11:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:20,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:20,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:20,070 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:20,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:11:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:11:20,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:11:20,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:20,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843726659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:20,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:20,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-14 05:11:20,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132406499] [2022-12-14 05:11:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:11:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:20,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:11:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:20,308 INFO L87 Difference]: Start difference. First operand 3493 states and 5575 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-12-14 05:11:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:20,650 INFO L93 Difference]: Finished difference Result 8154 states and 13245 transitions. [2022-12-14 05:11:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:11:20,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 118 [2022-12-14 05:11:20,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:20,671 INFO L225 Difference]: With dead ends: 8154 [2022-12-14 05:11:20,671 INFO L226 Difference]: Without dead ends: 4673 [2022-12-14 05:11:20,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:20,685 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 459 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:20,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 1305 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:11:20,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4673 states. [2022-12-14 05:11:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4673 to 4605. [2022-12-14 05:11:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 3272 states have (on average 1.4734107579462103) internal successors, (4821), 3486 states have internal predecessors, (4821), 1033 states have call successors, (1033), 252 states have call predecessors, (1033), 299 states have return successors, (1482), 998 states have call predecessors, (1482), 1028 states have call successors, (1482) [2022-12-14 05:11:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 7336 transitions. [2022-12-14 05:11:20,918 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 7336 transitions. Word has length 118 [2022-12-14 05:11:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:20,918 INFO L495 AbstractCegarLoop]: Abstraction has 4605 states and 7336 transitions. [2022-12-14 05:11:20,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-12-14 05:11:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 7336 transitions. [2022-12-14 05:11:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 05:11:20,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:20,922 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:20,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 05:11:21,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 05:11:21,123 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1356031188, now seen corresponding path program 1 times [2022-12-14 05:11:21,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:21,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538936737] [2022-12-14 05:11:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:11:21,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538936737] [2022-12-14 05:11:21,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538936737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648831714] [2022-12-14 05:11:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:21,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:21,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:21,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:21,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:11:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:11:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 05:11:21,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:21,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648831714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:21,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:21,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 05:11:21,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033171042] [2022-12-14 05:11:21,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:21,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:11:21,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:11:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:11:21,614 INFO L87 Difference]: Start difference. First operand 4605 states and 7336 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:11:22,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:22,486 INFO L93 Difference]: Finished difference Result 9235 states and 15075 transitions. [2022-12-14 05:11:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:11:22,487 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), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 123 [2022-12-14 05:11:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:22,502 INFO L225 Difference]: With dead ends: 9235 [2022-12-14 05:11:22,503 INFO L226 Difference]: Without dead ends: 5475 [2022-12-14 05:11:22,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:11:22,515 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 671 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:22,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 1172 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:11:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2022-12-14 05:11:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 5359. [2022-12-14 05:11:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 3708 states have (on average 1.4684466019417475) internal successors, (5445), 3968 states have internal predecessors, (5445), 1288 states have call successors, (1288), 324 states have call predecessors, (1288), 362 states have return successors, (1784), 1246 states have call predecessors, (1784), 1281 states have call successors, (1784) [2022-12-14 05:11:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 8517 transitions. [2022-12-14 05:11:22,794 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 8517 transitions. Word has length 123 [2022-12-14 05:11:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:22,794 INFO L495 AbstractCegarLoop]: Abstraction has 5359 states and 8517 transitions. [2022-12-14 05:11:22,794 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), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:11:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 8517 transitions. [2022-12-14 05:11:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 05:11:22,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:22,799 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:22,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 05:11:22,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 05:11:23,000 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:23,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2118837800, now seen corresponding path program 1 times [2022-12-14 05:11:23,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:23,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752774833] [2022-12-14 05:11:23,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:23,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:11:23,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752774833] [2022-12-14 05:11:23,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752774833] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853855203] [2022-12-14 05:11:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:23,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:23,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:23,197 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:23,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:11:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:23,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1891 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:11:23,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 05:11:23,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:23,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853855203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:23,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:23,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 05:11:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352418714] [2022-12-14 05:11:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:23,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:11:23,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:11:23,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:11:23,462 INFO L87 Difference]: Start difference. First operand 5359 states and 8517 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:11:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:24,625 INFO L93 Difference]: Finished difference Result 12851 states and 20864 transitions. [2022-12-14 05:11:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:11:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 124 [2022-12-14 05:11:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:24,654 INFO L225 Difference]: With dead ends: 12851 [2022-12-14 05:11:24,654 INFO L226 Difference]: Without dead ends: 8315 [2022-12-14 05:11:24,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:11:24,677 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 551 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:24,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1609 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:11:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2022-12-14 05:11:25,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 8297. [2022-12-14 05:11:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8297 states, 5632 states have (on average 1.4723011363636365) internal successors, (8292), 6066 states have internal predecessors, (8292), 2106 states have call successors, (2106), 518 states have call predecessors, (2106), 558 states have return successors, (2790), 2036 states have call predecessors, (2790), 2095 states have call successors, (2790) [2022-12-14 05:11:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8297 states to 8297 states and 13188 transitions. [2022-12-14 05:11:25,133 INFO L78 Accepts]: Start accepts. Automaton has 8297 states and 13188 transitions. Word has length 124 [2022-12-14 05:11:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:25,134 INFO L495 AbstractCegarLoop]: Abstraction has 8297 states and 13188 transitions. [2022-12-14 05:11:25,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:11:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 8297 states and 13188 transitions. [2022-12-14 05:11:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 05:11:25,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:25,139 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:25,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 05:11:25,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:25,340 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1544294544, now seen corresponding path program 1 times [2022-12-14 05:11:25,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:25,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069188109] [2022-12-14 05:11:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:25,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 05:11:25,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:25,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069188109] [2022-12-14 05:11:25,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069188109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:25,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914363429] [2022-12-14 05:11:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:25,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:25,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:25,651 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:25,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:11:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:11:25,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 05:11:25,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:25,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914363429] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:25,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:25,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 15 [2022-12-14 05:11:25,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779713981] [2022-12-14 05:11:25,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:25,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:11:25,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:25,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:11:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:11:25,940 INFO L87 Difference]: Start difference. First operand 8297 states and 13188 transitions. Second operand has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:11:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:27,381 INFO L93 Difference]: Finished difference Result 20700 states and 33321 transitions. [2022-12-14 05:11:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:11:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 125 [2022-12-14 05:11:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:27,433 INFO L225 Difference]: With dead ends: 20700 [2022-12-14 05:11:27,434 INFO L226 Difference]: Without dead ends: 13248 [2022-12-14 05:11:27,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:11:27,493 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 655 mSDsluCounter, 4226 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 4913 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:27,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 4913 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:11:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13248 states. [2022-12-14 05:11:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13248 to 11769. [2022-12-14 05:11:28,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11769 states, 7932 states have (on average 1.4747856782652546) internal successors, (11698), 8561 states have internal predecessors, (11698), 3063 states have call successors, (3063), 720 states have call predecessors, (3063), 773 states have return successors, (4197), 2979 states have call predecessors, (4197), 3046 states have call successors, (4197) [2022-12-14 05:11:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11769 states to 11769 states and 18958 transitions. [2022-12-14 05:11:28,179 INFO L78 Accepts]: Start accepts. Automaton has 11769 states and 18958 transitions. Word has length 125 [2022-12-14 05:11:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:28,179 INFO L495 AbstractCegarLoop]: Abstraction has 11769 states and 18958 transitions. [2022-12-14 05:11:28,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 05:11:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 11769 states and 18958 transitions. [2022-12-14 05:11:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 05:11:28,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:28,184 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:28,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 05:11:28,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:11:28,385 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:28,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1229462170, now seen corresponding path program 1 times [2022-12-14 05:11:28,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:28,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596850464] [2022-12-14 05:11:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 05:11:28,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596850464] [2022-12-14 05:11:28,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596850464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946651736] [2022-12-14 05:11:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:28,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:28,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:28,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:28,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:11:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:29,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:11:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 05:11:29,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:29,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946651736] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:29,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:29,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-12-14 05:11:29,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708720160] [2022-12-14 05:11:29,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:29,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:11:29,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:11:29,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-12-14 05:11:29,232 INFO L87 Difference]: Start difference. First operand 11769 states and 18958 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 05:11:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:31,225 INFO L93 Difference]: Finished difference Result 23521 states and 38498 transitions. [2022-12-14 05:11:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:11:31,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 141 [2022-12-14 05:11:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:31,264 INFO L225 Difference]: With dead ends: 23521 [2022-12-14 05:11:31,265 INFO L226 Difference]: Without dead ends: 10887 [2022-12-14 05:11:31,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-12-14 05:11:31,324 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 684 mSDsluCounter, 2470 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 3092 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:31,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 3092 Invalid, 1748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 05:11:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2022-12-14 05:11:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 10337. [2022-12-14 05:11:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10337 states, 7028 states have (on average 1.4726807057484348) internal successors, (10350), 7538 states have internal predecessors, (10350), 2587 states have call successors, (2587), 675 states have call predecessors, (2587), 721 states have return successors, (3596), 2543 states have call predecessors, (3596), 2565 states have call successors, (3596) [2022-12-14 05:11:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10337 states to 10337 states and 16533 transitions. [2022-12-14 05:11:31,955 INFO L78 Accepts]: Start accepts. Automaton has 10337 states and 16533 transitions. Word has length 141 [2022-12-14 05:11:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:31,955 INFO L495 AbstractCegarLoop]: Abstraction has 10337 states and 16533 transitions. [2022-12-14 05:11:31,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2022-12-14 05:11:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10337 states and 16533 transitions. [2022-12-14 05:11:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 05:11:31,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:31,961 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:31,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 05:11:32,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:11:32,162 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:32,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2076159299, now seen corresponding path program 1 times [2022-12-14 05:11:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:32,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456534520] [2022-12-14 05:11:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:32,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 05:11:32,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:32,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456534520] [2022-12-14 05:11:32,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456534520] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684183120] [2022-12-14 05:11:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:32,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:32,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:32,375 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:32,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:11:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:32,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:11:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 05:11:32,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:11:32,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684183120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:11:32,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:11:32,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 05:11:32,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737404057] [2022-12-14 05:11:32,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:11:32,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:11:32,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:11:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:11:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:11:32,634 INFO L87 Difference]: Start difference. First operand 10337 states and 16533 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:11:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:33,582 INFO L93 Difference]: Finished difference Result 21274 states and 34612 transitions. [2022-12-14 05:11:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:11:33,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 130 [2022-12-14 05:11:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:33,629 INFO L225 Difference]: With dead ends: 21274 [2022-12-14 05:11:33,630 INFO L226 Difference]: Without dead ends: 10337 [2022-12-14 05:11:33,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:11:33,697 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 180 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:33,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 1551 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:11:33,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10337 states. [2022-12-14 05:11:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10337 to 10337. [2022-12-14 05:11:34,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10337 states, 7028 states have (on average 1.452191235059761) internal successors, (10206), 7538 states have internal predecessors, (10206), 2587 states have call successors, (2587), 675 states have call predecessors, (2587), 721 states have return successors, (3596), 2543 states have call predecessors, (3596), 2565 states have call successors, (3596) [2022-12-14 05:11:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10337 states to 10337 states and 16389 transitions. [2022-12-14 05:11:34,398 INFO L78 Accepts]: Start accepts. Automaton has 10337 states and 16389 transitions. Word has length 130 [2022-12-14 05:11:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:34,398 INFO L495 AbstractCegarLoop]: Abstraction has 10337 states and 16389 transitions. [2022-12-14 05:11:34,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-12-14 05:11:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 10337 states and 16389 transitions. [2022-12-14 05:11:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 05:11:34,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:34,403 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:11:34,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:11:34,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:34,605 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1568318310, now seen corresponding path program 1 times [2022-12-14 05:11:34,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:34,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568529595] [2022-12-14 05:11:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:11:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 05:11:34,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:11:34,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568529595] [2022-12-14 05:11:34,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568529595] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:11:34,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008655319] [2022-12-14 05:11:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:34,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:34,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:34,829 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:34,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:11:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:11:35,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:11:35,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:11:35,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:11:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 05:11:35,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008655319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:11:35,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656950229] [2022-12-14 05:11:35,347 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-12-14 05:11:35,347 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:11:35,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:11:35,354 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:11:35,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:11:40,522 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2022-12-14 05:12:21,353 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 36 for LOIs [2022-12-14 05:12:21,355 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 46 for LOIs [2022-12-14 05:12:21,452 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 454 for LOIs [2022-12-14 05:12:21,605 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 51 for LOIs [2022-12-14 05:12:21,617 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 05:12:23,504 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 05:12:23,690 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 50 for LOIs [2022-12-14 05:12:23,703 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 40 for LOIs [2022-12-14 05:12:23,707 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 05:12:26,795 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 05:12:27,341 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 05:12:27,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:12:53,095 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:13:12,231 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 683 DAG size of output: 649 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:13:20,537 WARN L233 SmtUtils]: Spent 8.00s on a formula simplification. DAG size of input: 639 DAG size of output: 612 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:13:29,846 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification. DAG size of input: 674 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:13:38,219 WARN L233 SmtUtils]: Spent 8.00s on a formula simplification. DAG size of input: 674 DAG size of output: 614 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:13:46,361 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 675 DAG size of output: 613 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:13:56,222 WARN L233 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 686 DAG size of output: 615 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:14:06,023 WARN L233 SmtUtils]: Spent 9.36s on a formula simplification. DAG size of input: 676 DAG size of output: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:14:11,478 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 677 DAG size of output: 587 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:14:26,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '315373#(and (not (= ~calls_0~0 0)) (= ~head~0.offset 0) (= ~currentHeading~0 1) (<= ~floorButtons_0~0 2147483647) (<= 0 (+ ~calls_0~0 2147483648)) (= ~head~0.base 0) (= |#NULL.offset| 0) (= 0 (+ ~expectedDirection~0 1)) (<= 0 (+ ~floorButtons_0~0 2147483648)) (not (= ~doorState~0 1)) (<= ~calls_0~0 2147483647) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 05:14:26,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:14:26,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:14:26,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-14 05:14:26,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031274319] [2022-12-14 05:14:26,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:14:26,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 05:14:26,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:14:26,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 05:14:26,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=4354, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 05:14:26,336 INFO L87 Difference]: Start difference. First operand 10337 states and 16389 transitions. Second operand has 18 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 7 states have call successors, (49), 4 states have call predecessors, (49), 9 states have return successors, (48), 10 states have call predecessors, (48), 7 states have call successors, (48) [2022-12-14 05:14:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:14:39,491 INFO L93 Difference]: Finished difference Result 44359 states and 76592 transitions. [2022-12-14 05:14:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-14 05:14:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 7 states have call successors, (49), 4 states have call predecessors, (49), 9 states have return successors, (48), 10 states have call predecessors, (48), 7 states have call successors, (48) Word has length 134 [2022-12-14 05:14:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:14:39,661 INFO L225 Difference]: With dead ends: 44359 [2022-12-14 05:14:39,661 INFO L226 Difference]: Without dead ends: 34017 [2022-12-14 05:14:39,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 352 SyntacticMatches, 14 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8766 ImplicationChecksByTransitivity, 120.7s TimeCoverageRelationStatistics Valid=1393, Invalid=20659, Unknown=0, NotChecked=0, Total=22052 [2022-12-14 05:14:39,766 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 4945 mSDsluCounter, 7318 mSDsCounter, 0 mSdLazyCounter, 20008 mSolverCounterSat, 3588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5107 SdHoareTripleChecker+Valid, 8105 SdHoareTripleChecker+Invalid, 23596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3588 IncrementalHoareTripleChecker+Valid, 20008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:14:39,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5107 Valid, 8105 Invalid, 23596 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3588 Valid, 20008 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-12-14 05:14:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34017 states. [2022-12-14 05:14:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34017 to 27250. [2022-12-14 05:14:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27250 states, 18257 states have (on average 1.4602070438735828) internal successors, (26659), 19916 states have internal predecessors, (26659), 7196 states have call successors, (7196), 1652 states have call predecessors, (7196), 1796 states have return successors, (10812), 6703 states have call predecessors, (10812), 7154 states have call successors, (10812) [2022-12-14 05:14:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27250 states to 27250 states and 44667 transitions. [2022-12-14 05:14:41,983 INFO L78 Accepts]: Start accepts. Automaton has 27250 states and 44667 transitions. Word has length 134 [2022-12-14 05:14:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:14:41,983 INFO L495 AbstractCegarLoop]: Abstraction has 27250 states and 44667 transitions. [2022-12-14 05:14:41,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 8.466666666666667) internal successors, (127), 15 states have internal predecessors, (127), 7 states have call successors, (49), 4 states have call predecessors, (49), 9 states have return successors, (48), 10 states have call predecessors, (48), 7 states have call successors, (48) [2022-12-14 05:14:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 27250 states and 44667 transitions. [2022-12-14 05:14:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 05:14:41,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:14:41,992 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:14:41,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 05:14:42,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:14:42,193 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:14:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:14:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash -702344895, now seen corresponding path program 1 times [2022-12-14 05:14:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:14:42,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133638438] [2022-12-14 05:14:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:14:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 05:14:42,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:14:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133638438] [2022-12-14 05:14:42,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133638438] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:14:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828810784] [2022-12-14 05:14:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:42,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:14:42,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:14:42,706 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:14:42,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:14:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:42,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1925 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:14:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:14:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 05:14:43,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:14:43,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828810784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:14:43,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:14:43,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-12-14 05:14:43,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391789093] [2022-12-14 05:14:43,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:14:43,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:14:43,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:14:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:14:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-12-14 05:14:43,049 INFO L87 Difference]: Start difference. First operand 27250 states and 44667 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 05:14:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:14:45,798 INFO L93 Difference]: Finished difference Result 51482 states and 84552 transitions. [2022-12-14 05:14:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:14:45,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2022-12-14 05:14:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:14:45,924 INFO L225 Difference]: With dead ends: 51482 [2022-12-14 05:14:45,924 INFO L226 Difference]: Without dead ends: 25631 [2022-12-14 05:14:46,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-12-14 05:14:46,149 INFO L413 NwaCegarLoop]: 936 mSDtfsCounter, 589 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 4502 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:14:46,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 4502 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1966 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:14:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25631 states. [2022-12-14 05:14:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25631 to 25288. [2022-12-14 05:14:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25288 states, 16931 states have (on average 1.4567361644321069) internal successors, (24664), 18489 states have internal predecessors, (24664), 6645 states have call successors, (6645), 1550 states have call predecessors, (6645), 1711 states have return successors, (9660), 6174 states have call predecessors, (9660), 6605 states have call successors, (9660) [2022-12-14 05:14:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25288 states to 25288 states and 40969 transitions. [2022-12-14 05:14:47,854 INFO L78 Accepts]: Start accepts. Automaton has 25288 states and 40969 transitions. Word has length 139 [2022-12-14 05:14:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:14:47,854 INFO L495 AbstractCegarLoop]: Abstraction has 25288 states and 40969 transitions. [2022-12-14 05:14:47,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 05:14:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 25288 states and 40969 transitions. [2022-12-14 05:14:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 05:14:47,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:14:47,862 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:14:47,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 05:14:48,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:14:48,064 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:14:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:14:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash -11398067, now seen corresponding path program 1 times [2022-12-14 05:14:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:14:48,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663138724] [2022-12-14 05:14:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:48,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:14:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 05:14:48,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:14:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663138724] [2022-12-14 05:14:48,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663138724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:14:48,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964369731] [2022-12-14 05:14:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:14:48,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:14:48,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:14:48,382 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:14:48,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 05:14:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:14:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:14:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:14:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 05:14:48,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:14:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 05:14:49,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964369731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:14:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208043595] [2022-12-14 05:14:49,010 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2022-12-14 05:14:49,011 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:14:49,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:14:49,011 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:14:49,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:14:52,628 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-12-14 05:14:57,503 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 491 for LOIs [2022-12-14 05:14:57,817 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 05:14:59,709 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 05:14:59,894 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-12-14 05:14:59,965 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 05:15:03,103 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 05:15:03,647 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 05:15:03,802 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:16:13,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [208043595] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:16:13,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:16:13,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [7, 6, 7] total 39 [2022-12-14 05:16:13,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145337822] [2022-12-14 05:16:13,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:16:13,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 05:16:13,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:16:13,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 05:16:13,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 05:16:13,297 INFO L87 Difference]: Start difference. First operand 25288 states and 40969 transitions. Second operand has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-12-14 05:16:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:16:51,335 INFO L93 Difference]: Finished difference Result 50686 states and 82112 transitions. [2022-12-14 05:16:51,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 05:16:51,336 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 140 [2022-12-14 05:16:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:16:51,439 INFO L225 Difference]: With dead ends: 50686 [2022-12-14 05:16:51,440 INFO L226 Difference]: Without dead ends: 25410 [2022-12-14 05:16:51,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 385 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 87.2s TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 05:16:51,547 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 270 mSDsluCounter, 3829 mSDsCounter, 0 mSdLazyCounter, 4577 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 4399 SdHoareTripleChecker+Invalid, 4645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:16:51,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 4399 Invalid, 4645 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 4577 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2022-12-14 05:16:51,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25410 states. [2022-12-14 05:16:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25410 to 25331. [2022-12-14 05:16:53,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25331 states, 16964 states have (on average 1.4560834708795096) internal successors, (24701), 18521 states have internal predecessors, (24701), 6651 states have call successors, (6651), 1555 states have call predecessors, (6651), 1715 states have return successors, (9664), 6180 states have call predecessors, (9664), 6611 states have call successors, (9664) [2022-12-14 05:16:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25331 states to 25331 states and 41016 transitions. [2022-12-14 05:16:53,364 INFO L78 Accepts]: Start accepts. Automaton has 25331 states and 41016 transitions. Word has length 140 [2022-12-14 05:16:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:16:53,364 INFO L495 AbstractCegarLoop]: Abstraction has 25331 states and 41016 transitions. [2022-12-14 05:16:53,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 4.15) internal successors, (83), 15 states have internal predecessors, (83), 10 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-12-14 05:16:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 25331 states and 41016 transitions. [2022-12-14 05:16:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 05:16:53,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:16:53,372 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:16:53,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 05:16:53,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:53,574 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:16:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:16:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash 131219234, now seen corresponding path program 1 times [2022-12-14 05:16:53,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:16:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701221188] [2022-12-14 05:16:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:16:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 05:16:54,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:16:54,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701221188] [2022-12-14 05:16:54,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701221188] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:16:54,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774383289] [2022-12-14 05:16:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:54,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:54,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:16:54,199 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:16:54,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 05:16:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:54,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:16:54,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:16:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:16:54,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:16:54,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774383289] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:16:54,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:16:54,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2022-12-14 05:16:54,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553094016] [2022-12-14 05:16:54,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:16:54,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:16:54,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:16:54,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:16:54,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-12-14 05:16:54,496 INFO L87 Difference]: Start difference. First operand 25331 states and 41016 transitions. Second operand has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 05:16:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:16:57,487 INFO L93 Difference]: Finished difference Result 49269 states and 79469 transitions. [2022-12-14 05:16:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:16:57,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) Word has length 142 [2022-12-14 05:16:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:16:57,592 INFO L225 Difference]: With dead ends: 49269 [2022-12-14 05:16:57,592 INFO L226 Difference]: Without dead ends: 25412 [2022-12-14 05:16:57,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-12-14 05:16:57,702 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 551 mSDsluCounter, 3950 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 4891 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:16:57,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 4891 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:16:57,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25412 states. [2022-12-14 05:16:59,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25412 to 25391. [2022-12-14 05:16:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25391 states, 17024 states have (on average 1.4544760338345866) internal successors, (24761), 18551 states have internal predecessors, (24761), 6651 states have call successors, (6651), 1585 states have call predecessors, (6651), 1715 states have return successors, (9604), 6180 states have call predecessors, (9604), 6611 states have call successors, (9604) [2022-12-14 05:16:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25391 states to 25391 states and 41016 transitions. [2022-12-14 05:16:59,552 INFO L78 Accepts]: Start accepts. Automaton has 25391 states and 41016 transitions. Word has length 142 [2022-12-14 05:16:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:16:59,553 INFO L495 AbstractCegarLoop]: Abstraction has 25391 states and 41016 transitions. [2022-12-14 05:16:59,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 3 states have call successors, (25), 3 states have call predecessors, (25), 5 states have return successors, (24), 4 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 05:16:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 25391 states and 41016 transitions. [2022-12-14 05:16:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 05:16:59,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:16:59,561 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:16:59,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 05:16:59,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:59,762 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:16:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:16:59,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1389558448, now seen corresponding path program 1 times [2022-12-14 05:16:59,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:16:59,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353564063] [2022-12-14 05:16:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:59,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:16:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:17:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 05:17:00,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:17:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353564063] [2022-12-14 05:17:00,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353564063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:17:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166978465] [2022-12-14 05:17:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:17:00,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:17:00,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:17:00,331 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:17:00,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 05:17:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:17:00,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1957 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:17:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:17:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 05:17:00,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:17:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 05:17:01,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166978465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:17:01,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571644954] [2022-12-14 05:17:01,028 INFO L159 IcfgInterpreter]: Started Sifa with 98 locations of interest [2022-12-14 05:17:01,028 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:17:01,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:17:01,028 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:17:01,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:17:06,252 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 663 for LOIs [2022-12-14 05:17:13,127 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 26 for LOIs [2022-12-14 05:17:13,129 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 39 for LOIs [2022-12-14 05:17:13,245 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 61 for LOIs [2022-12-14 05:17:13,258 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 54 for LOIs [2022-12-14 05:17:13,272 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 05:17:15,175 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 05:17:15,363 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 36 for LOIs [2022-12-14 05:17:15,416 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 54 for LOIs [2022-12-14 05:17:15,422 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 40 for LOIs [2022-12-14 05:17:15,426 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 05:17:18,613 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 05:17:19,172 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 05:17:19,305 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:18:23,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '742183#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (<= ~floorButtons_0~0 2147483647) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (<= 0 (+ ~floorButtons_0~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 05:18:23,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:18:23,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:18:23,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 10] total 29 [2022-12-14 05:18:23,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901353289] [2022-12-14 05:18:23,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:18:23,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 05:18:23,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:18:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 05:18:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=10918, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 05:18:23,635 INFO L87 Difference]: Start difference. First operand 25391 states and 41016 transitions. Second operand has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2022-12-14 05:18:40,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:18:40,630 INFO L93 Difference]: Finished difference Result 69681 states and 118442 transitions. [2022-12-14 05:18:40,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 05:18:40,631 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) Word has length 146 [2022-12-14 05:18:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:18:40,834 INFO L225 Difference]: With dead ends: 69681 [2022-12-14 05:18:40,834 INFO L226 Difference]: Without dead ends: 45180 [2022-12-14 05:18:41,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 375 SyntacticMatches, 7 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16748 ImplicationChecksByTransitivity, 66.8s TimeCoverageRelationStatistics Valid=3338, Invalid=37264, Unknown=0, NotChecked=0, Total=40602 [2022-12-14 05:18:41,010 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 6918 mSDsluCounter, 7076 mSDsCounter, 0 mSdLazyCounter, 20890 mSolverCounterSat, 5524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6918 SdHoareTripleChecker+Valid, 7597 SdHoareTripleChecker+Invalid, 26414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5524 IncrementalHoareTripleChecker+Valid, 20890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:18:41,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6918 Valid, 7597 Invalid, 26414 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5524 Valid, 20890 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-12-14 05:18:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45180 states. [2022-12-14 05:18:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45180 to 40837. [2022-12-14 05:18:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40837 states, 27158 states have (on average 1.4587966713307312) internal successors, (39618), 29718 states have internal predecessors, (39618), 10990 states have call successors, (10990), 2498 states have call predecessors, (10990), 2688 states have return successors, (16193), 10264 states have call predecessors, (16193), 10928 states have call successors, (16193) [2022-12-14 05:18:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40837 states to 40837 states and 66801 transitions. [2022-12-14 05:18:44,824 INFO L78 Accepts]: Start accepts. Automaton has 40837 states and 66801 transitions. Word has length 146 [2022-12-14 05:18:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:18:44,824 INFO L495 AbstractCegarLoop]: Abstraction has 40837 states and 66801 transitions. [2022-12-14 05:18:44,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 8.523809523809524) internal successors, (179), 26 states have internal predecessors, (179), 15 states have call successors, (67), 9 states have call predecessors, (67), 15 states have return successors, (66), 16 states have call predecessors, (66), 15 states have call successors, (66) [2022-12-14 05:18:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 40837 states and 66801 transitions. [2022-12-14 05:18:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 05:18:44,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:18:44,829 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:18:44,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 05:18:45,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:18:45,030 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:18:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:18:45,031 INFO L85 PathProgramCache]: Analyzing trace with hash 241563953, now seen corresponding path program 1 times [2022-12-14 05:18:45,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:18:45,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437411295] [2022-12-14 05:18:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:45,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:18:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 05:18:45,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:18:45,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437411295] [2022-12-14 05:18:45,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437411295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:18:45,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:18:45,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:18:45,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138729076] [2022-12-14 05:18:45,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:18:45,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:18:45,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:18:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:18:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:18:45,165 INFO L87 Difference]: Start difference. First operand 40837 states and 66801 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:18:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:18:49,895 INFO L93 Difference]: Finished difference Result 80038 states and 133875 transitions. [2022-12-14 05:18:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:18:49,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 146 [2022-12-14 05:18:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:18:50,152 INFO L225 Difference]: With dead ends: 80038 [2022-12-14 05:18:50,152 INFO L226 Difference]: Without dead ends: 41222 [2022-12-14 05:18:50,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:18:50,378 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 13 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:18:50,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2196 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:18:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41222 states. [2022-12-14 05:18:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41222 to 40627. [2022-12-14 05:18:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40627 states, 27078 states have (on average 1.4573085161385626) internal successors, (39461), 29642 states have internal predecessors, (39461), 10825 states have call successors, (10825), 2403 states have call predecessors, (10825), 2723 states have return successors, (16038), 10225 states have call predecessors, (16038), 10768 states have call successors, (16038) [2022-12-14 05:18:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40627 states to 40627 states and 66324 transitions. [2022-12-14 05:18:54,849 INFO L78 Accepts]: Start accepts. Automaton has 40627 states and 66324 transitions. Word has length 146 [2022-12-14 05:18:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:18:54,849 INFO L495 AbstractCegarLoop]: Abstraction has 40627 states and 66324 transitions. [2022-12-14 05:18:54,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:18:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 40627 states and 66324 transitions. [2022-12-14 05:18:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 05:18:54,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:18:54,855 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:18:54,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 05:18:54,855 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:18:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:18:54,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1586980011, now seen corresponding path program 1 times [2022-12-14 05:18:54,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:18:54,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121875912] [2022-12-14 05:18:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:54,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:18:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 05:18:55,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:18:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121875912] [2022-12-14 05:18:55,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121875912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:18:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613607577] [2022-12-14 05:18:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:55,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:18:55,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:18:55,075 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:18:55,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 05:18:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:55,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:18:55,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:18:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 05:18:55,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:18:55,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613607577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:18:55,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:18:55,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-14 05:18:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688824800] [2022-12-14 05:18:55,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:18:55,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:18:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:18:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:18:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:18:55,297 INFO L87 Difference]: Start difference. First operand 40627 states and 66324 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:19:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:19:00,477 INFO L93 Difference]: Finished difference Result 79510 states and 131992 transitions. [2022-12-14 05:19:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:19:00,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 156 [2022-12-14 05:19:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:19:00,722 INFO L225 Difference]: With dead ends: 79510 [2022-12-14 05:19:00,723 INFO L226 Difference]: Without dead ends: 40910 [2022-12-14 05:19:00,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:19:00,982 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 464 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 3005 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:19:00,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 3005 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:19:01,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40910 states. [2022-12-14 05:19:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40910 to 40574. [2022-12-14 05:19:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40574 states, 27045 states have (on average 1.4575707154742097) internal successors, (39420), 29603 states have internal predecessors, (39420), 10818 states have call successors, (10818), 2399 states have call predecessors, (10818), 2710 states have return successors, (16008), 10215 states have call predecessors, (16008), 10761 states have call successors, (16008) [2022-12-14 05:19:04,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40574 states to 40574 states and 66246 transitions. [2022-12-14 05:19:04,656 INFO L78 Accepts]: Start accepts. Automaton has 40574 states and 66246 transitions. Word has length 156 [2022-12-14 05:19:04,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:19:04,656 INFO L495 AbstractCegarLoop]: Abstraction has 40574 states and 66246 transitions. [2022-12-14 05:19:04,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 05:19:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 40574 states and 66246 transitions. [2022-12-14 05:19:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 05:19:04,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:19:04,662 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:19:04,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 05:19:04,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 05:19:04,863 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:19:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:19:04,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1094484595, now seen corresponding path program 1 times [2022-12-14 05:19:04,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:19:04,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589053704] [2022-12-14 05:19:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:19:04,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:19:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:19:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 05:19:05,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:19:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589053704] [2022-12-14 05:19:05,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589053704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:19:05,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618019370] [2022-12-14 05:19:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:19:05,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:19:05,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:19:05,245 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:19:05,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 05:19:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:19:05,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:19:05,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:19:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 05:19:05,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:19:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 05:19:05,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618019370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:19:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [691011023] [2022-12-14 05:19:05,996 INFO L159 IcfgInterpreter]: Started Sifa with 120 locations of interest [2022-12-14 05:19:05,997 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:19:05,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:19:05,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:19:05,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:19:09,637 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-12-14 05:19:16,464 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 55 for LOIs [2022-12-14 05:19:16,483 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 05:19:19,491 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 05:19:19,860 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-12-14 05:19:20,005 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 05:19:23,575 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 05:19:24,120 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 05:19:24,252 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:20:37,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [691011023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:20:37,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:20:37,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [8, 6, 7] total 43 [2022-12-14 05:20:37,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664297364] [2022-12-14 05:20:37,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:20:37,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 05:20:37,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:20:37,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 05:20:37,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 05:20:37,579 INFO L87 Difference]: Start difference. First operand 40574 states and 66246 transitions. Second operand has 29 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 16 states have internal predecessors, (84), 11 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-12-14 05:21:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:21:29,642 INFO L93 Difference]: Finished difference Result 81103 states and 132025 transitions. [2022-12-14 05:21:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 05:21:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 16 states have internal predecessors, (84), 11 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 159 [2022-12-14 05:21:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:21:29,863 INFO L225 Difference]: With dead ends: 81103 [2022-12-14 05:21:29,863 INFO L226 Difference]: Without dead ends: 40643 [2022-12-14 05:21:30,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 439 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 89.8s TimeCoverageRelationStatistics Valid=221, Invalid=2035, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 05:21:30,050 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 114 mSDsluCounter, 5119 mSDsCounter, 0 mSdLazyCounter, 7555 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 5686 SdHoareTripleChecker+Invalid, 7577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 7555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:21:30,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 5686 Invalid, 7577 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 7555 Invalid, 0 Unknown, 0 Unchecked, 31.6s Time] [2022-12-14 05:21:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40643 states. [2022-12-14 05:21:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40643 to 40576. [2022-12-14 05:21:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40576 states, 27046 states have (on average 1.4575168231901205) internal successors, (39420), 29604 states have internal predecessors, (39420), 10818 states have call successors, (10818), 2400 states have call predecessors, (10818), 2711 states have return successors, (16008), 10215 states have call predecessors, (16008), 10761 states have call successors, (16008) [2022-12-14 05:21:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40576 states to 40576 states and 66246 transitions. [2022-12-14 05:21:33,810 INFO L78 Accepts]: Start accepts. Automaton has 40576 states and 66246 transitions. Word has length 159 [2022-12-14 05:21:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:21:33,810 INFO L495 AbstractCegarLoop]: Abstraction has 40576 states and 66246 transitions. [2022-12-14 05:21:33,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 16 states have internal predecessors, (84), 11 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-12-14 05:21:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 40576 states and 66246 transitions. [2022-12-14 05:21:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-12-14 05:21:33,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:21:33,816 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:21:33,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 05:21:34,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 05:21:34,017 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:21:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:21:34,018 INFO L85 PathProgramCache]: Analyzing trace with hash -103985959, now seen corresponding path program 1 times [2022-12-14 05:21:34,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:21:34,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902520913] [2022-12-14 05:21:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:34,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:21:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 05:21:34,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:21:34,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902520913] [2022-12-14 05:21:34,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902520913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:21:34,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925962921] [2022-12-14 05:21:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:21:34,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:21:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:21:34,413 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:21:34,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 05:21:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:21:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:21:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:21:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 05:21:34,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:21:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 05:21:35,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925962921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:21:35,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1375038200] [2022-12-14 05:21:35,089 INFO L159 IcfgInterpreter]: Started Sifa with 124 locations of interest [2022-12-14 05:21:35,089 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:21:35,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:21:35,090 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:21:35,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:21:38,626 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 566 for LOIs [2022-12-14 05:21:47,110 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 103 for LOIs [2022-12-14 05:21:47,135 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 595 for LOIs [2022-12-14 05:21:49,030 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 569 for LOIs [2022-12-14 05:21:49,218 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 433 for LOIs [2022-12-14 05:21:49,285 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 569 for LOIs [2022-12-14 05:21:52,449 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-12-14 05:21:53,029 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-12-14 05:21:53,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:23:11,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1375038200] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:23:11,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:23:11,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [8, 6, 7] total 45 [2022-12-14 05:23:11,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109653174] [2022-12-14 05:23:11,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:23:11,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 05:23:11,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:23:11,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 05:23:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 05:23:11,572 INFO L87 Difference]: Start difference. First operand 40576 states and 66246 transitions. Second operand has 31 states, 24 states have (on average 3.625) internal successors, (87), 17 states have internal predecessors, (87), 12 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-14 05:23:59,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:23:59,897 INFO L93 Difference]: Finished difference Result 81102 states and 131950 transitions. [2022-12-14 05:23:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 05:23:59,898 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 3.625) internal successors, (87), 17 states have internal predecessors, (87), 12 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) Word has length 165 [2022-12-14 05:23:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:24:00,122 INFO L225 Difference]: With dead ends: 81102 [2022-12-14 05:24:00,122 INFO L226 Difference]: Without dead ends: 40642 [2022-12-14 05:24:00,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 451 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 95.7s TimeCoverageRelationStatistics Valid=241, Invalid=2209, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 05:24:00,386 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 144 mSDsluCounter, 4591 mSDsCounter, 0 mSdLazyCounter, 6557 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 5062 SdHoareTripleChecker+Invalid, 6588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 6557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:24:00,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 5062 Invalid, 6588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 6557 Invalid, 0 Unknown, 0 Unchecked, 27.1s Time] [2022-12-14 05:24:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40642 states. [2022-12-14 05:24:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40642 to 40575. [2022-12-14 05:24:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40575 states, 27047 states have (on average 1.4574629348911154) internal successors, (39420), 29605 states have internal predecessors, (39420), 10815 states have call successors, (10815), 2401 states have call predecessors, (10815), 2712 states have return successors, (15936), 10212 states have call predecessors, (15936), 10758 states have call successors, (15936) [2022-12-14 05:24:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40575 states to 40575 states and 66171 transitions. [2022-12-14 05:24:03,956 INFO L78 Accepts]: Start accepts. Automaton has 40575 states and 66171 transitions. Word has length 165 [2022-12-14 05:24:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:24:03,956 INFO L495 AbstractCegarLoop]: Abstraction has 40575 states and 66171 transitions. [2022-12-14 05:24:03,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 3.625) internal successors, (87), 17 states have internal predecessors, (87), 12 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-14 05:24:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 40575 states and 66171 transitions. [2022-12-14 05:24:03,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 05:24:03,960 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:24:03,961 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:24:03,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 05:24:04,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:24:04,161 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:24:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:24:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2121284113, now seen corresponding path program 1 times [2022-12-14 05:24:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:24:04,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615806376] [2022-12-14 05:24:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:24:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:24:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:24:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 05:24:04,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:24:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615806376] [2022-12-14 05:24:04,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615806376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:24:04,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897022703] [2022-12-14 05:24:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:24:04,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:24:04,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:24:04,834 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:24:04,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 05:24:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:24:05,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:24:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:24:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 05:24:05,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:24:05,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897022703] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:24:05,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:24:05,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-12-14 05:24:05,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345173525] [2022-12-14 05:24:05,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:24:05,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:24:05,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:24:05,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:24:05,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:24:05,119 INFO L87 Difference]: Start difference. First operand 40575 states and 66171 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:24:09,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:24:09,321 INFO L93 Difference]: Finished difference Result 79504 states and 132136 transitions. [2022-12-14 05:24:09,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:24:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 166 [2022-12-14 05:24:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:24:09,502 INFO L225 Difference]: With dead ends: 79504 [2022-12-14 05:24:09,502 INFO L226 Difference]: Without dead ends: 40763 [2022-12-14 05:24:09,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:24:09,729 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 110 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:24:09,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1035 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:24:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40763 states. [2022-12-14 05:24:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40763 to 40592. [2022-12-14 05:24:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40592 states, 27082 states have (on average 1.4426556384314304) internal successors, (39070), 29615 states have internal predecessors, (39070), 10811 states have call successors, (10811), 2424 states have call predecessors, (10811), 2698 states have return successors, (15512), 10196 states have call predecessors, (15512), 10754 states have call successors, (15512) [2022-12-14 05:24:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40592 states to 40592 states and 65393 transitions. [2022-12-14 05:24:13,374 INFO L78 Accepts]: Start accepts. Automaton has 40592 states and 65393 transitions. Word has length 166 [2022-12-14 05:24:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:24:13,375 INFO L495 AbstractCegarLoop]: Abstraction has 40592 states and 65393 transitions. [2022-12-14 05:24:13,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 05:24:13,375 INFO L276 IsEmpty]: Start isEmpty. Operand 40592 states and 65393 transitions. [2022-12-14 05:24:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 05:24:13,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:24:13,379 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:24:13,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 05:24:13,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 05:24:13,580 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:24:13,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:24:13,580 INFO L85 PathProgramCache]: Analyzing trace with hash -92413861, now seen corresponding path program 1 times [2022-12-14 05:24:13,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:24:13,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277377338] [2022-12-14 05:24:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:24:13,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:24:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:24:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 18 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 05:24:14,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:24:14,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277377338] [2022-12-14 05:24:14,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277377338] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:24:14,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636227131] [2022-12-14 05:24:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:24:14,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:24:14,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:24:14,333 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:24:14,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1950a6c1-f518-44a2-9544-12885868c32d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 05:24:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:24:14,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1997 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 05:24:14,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:24:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 05:24:14,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:24:14,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636227131] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:24:14,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 05:24:14,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 20 [2022-12-14 05:24:14,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384376930] [2022-12-14 05:24:14,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:24:14,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:24:14,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:24:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:24:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:24:14,540 INFO L87 Difference]: Start difference. First operand 40592 states and 65393 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26)