./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem04_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem04_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 70a723347c995e7e314d216fc05cfac14389fb76f31fa273b09514d7bf2a1a92 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:10:26,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:10:26,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:10:26,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:10:26,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:10:26,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:10:26,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:10:26,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:10:26,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:10:26,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:10:26,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:10:26,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:10:26,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:10:26,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:10:26,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:10:26,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:10:26,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:10:26,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:10:26,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:10:26,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:10:26,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:10:26,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:10:26,947 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:10:26,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:10:26,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:10:26,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:10:26,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:10:26,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:10:26,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:10:26,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:10:26,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:10:26,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:10:26,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:10:26,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:10:26,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:10:26,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:10:26,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:10:26,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:10:26,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:10:26,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:10:26,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:10:26,982 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:10:27,034 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:10:27,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:10:27,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:10:27,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:10:27,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:10:27,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:10:27,037 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:10:27,037 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:10:27,038 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:10:27,038 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:10:27,039 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:10:27,039 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:10:27,039 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:10:27,040 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:10:27,040 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:10:27,040 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:10:27,040 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:10:27,041 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:10:27,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:10:27,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:10:27,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:10:27,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:10:27,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:10:27,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:10:27,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:10:27,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:10:27,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:10:27,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:10:27,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:10:27,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:10:27,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:10:27,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:10:27,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:10:27,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:10:27,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:10:27,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:10:27,047 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:10:27,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:10:27,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:10:27,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:10:27,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:10:27,048 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 70a723347c995e7e314d216fc05cfac14389fb76f31fa273b09514d7bf2a1a92 [2021-11-23 03:10:27,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:10:27,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:10:27,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:10:27,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:10:27,423 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:10:27,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/eca-rers2012/Problem04_label06.c [2021-11-23 03:10:27,495 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/data/8065b6515/dbf7c3a9b4384f29b280e17744f0ac16/FLAG62ae14df3 [2021-11-23 03:10:28,488 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:10:28,489 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/sv-benchmarks/c/eca-rers2012/Problem04_label06.c [2021-11-23 03:10:28,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/data/8065b6515/dbf7c3a9b4384f29b280e17744f0ac16/FLAG62ae14df3 [2021-11-23 03:10:28,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/data/8065b6515/dbf7c3a9b4384f29b280e17744f0ac16 [2021-11-23 03:10:28,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:10:28,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:10:28,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:10:28,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:10:28,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:10:28,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:10:28" (1/1) ... [2021-11-23 03:10:28,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1574f1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:28, skipping insertion in model container [2021-11-23 03:10:28,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:10:28" (1/1) ... [2021-11-23 03:10:28,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:10:29,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:10:30,578 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/sv-benchmarks/c/eca-rers2012/Problem04_label06.c[177050,177063] [2021-11-23 03:10:30,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:10:30,631 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:10:31,404 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/sv-benchmarks/c/eca-rers2012/Problem04_label06.c[177050,177063] [2021-11-23 03:10:31,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:10:31,456 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:10:31,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31 WrapperNode [2021-11-23 03:10:31,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:10:31,458 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:10:31,458 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:10:31,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:10:31,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:31,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:31,750 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5572 [2021-11-23 03:10:31,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:10:31,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:10:31,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:10:31,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:10:31,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:31,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:31,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:31,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:31,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:31,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:32,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:32,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:10:32,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:10:32,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:10:32,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:10:32,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (1/1) ... [2021-11-23 03:10:32,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:10:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:10:32,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:10:32,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:10:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:10:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:10:32,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:10:32,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:10:32,376 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:10:32,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:10:36,889 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:10:37,231 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:10:37,232 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:10:37,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:10:37 BoogieIcfgContainer [2021-11-23 03:10:37,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:10:37,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:10:37,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:10:37,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:10:37,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:10:28" (1/3) ... [2021-11-23 03:10:37,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382bdb51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:10:37, skipping insertion in model container [2021-11-23 03:10:37,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:10:31" (2/3) ... [2021-11-23 03:10:37,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382bdb51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:10:37, skipping insertion in model container [2021-11-23 03:10:37,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:10:37" (3/3) ... [2021-11-23 03:10:37,250 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label06.c [2021-11-23 03:10:37,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:10:37,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:10:37,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:10:37,343 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:10:37,343 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:10:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 763 states, 761 states have (on average 1.9908015768725362) internal successors, (1515), 762 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2021-11-23 03:10:37,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:37,455 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:37,456 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2067663984, now seen corresponding path program 1 times [2021-11-23 03:10:37,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:37,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113491658] [2021-11-23 03:10:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:37,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:40,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113491658] [2021-11-23 03:10:40,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113491658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:10:40,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:10:40,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 03:10:40,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914584279] [2021-11-23 03:10:40,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:10:40,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:10:40,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:10:40,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:10:40,127 INFO L87 Difference]: Start difference. First operand has 763 states, 761 states have (on average 1.9908015768725362) internal successors, (1515), 762 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 12 states, 12 states have (on average 62.916666666666664) internal successors, (755), 11 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:49,289 INFO L93 Difference]: Finished difference Result 2246 states and 4468 transitions. [2021-11-23 03:10:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:10:49,292 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 62.916666666666664) internal successors, (755), 11 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 755 [2021-11-23 03:10:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:49,332 INFO L225 Difference]: With dead ends: 2246 [2021-11-23 03:10:49,332 INFO L226 Difference]: Without dead ends: 1480 [2021-11-23 03:10:49,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:10:49,344 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1333 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 11379 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 12092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 11379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:49,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1333 Valid, 843 Invalid, 12092 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [713 Valid, 11379 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 03:10:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-11-23 03:10:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1480. [2021-11-23 03:10:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 1.511156186612576) internal successors, (2235), 1479 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 2235 transitions. [2021-11-23 03:10:49,474 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 2235 transitions. Word has length 755 [2021-11-23 03:10:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 1480 states and 2235 transitions. [2021-11-23 03:10:49,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.916666666666664) internal successors, (755), 11 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 2235 transitions. [2021-11-23 03:10:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-11-23 03:10:49,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:49,510 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:49,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:10:49,511 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:49,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:49,516 INFO L85 PathProgramCache]: Analyzing trace with hash 541616923, now seen corresponding path program 1 times [2021-11-23 03:10:49,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:49,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557405468] [2021-11-23 03:10:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:49,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:51,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:51,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557405468] [2021-11-23 03:10:51,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557405468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:10:51,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:10:51,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-23 03:10:51,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223186980] [2021-11-23 03:10:51,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:10:51,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:10:51,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:51,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:10:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:10:51,169 INFO L87 Difference]: Start difference. First operand 1480 states and 2235 transitions. Second operand has 13 states, 13 states have (on average 59.23076923076923) internal successors, (770), 12 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:58,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:10:58,863 INFO L93 Difference]: Finished difference Result 3684 states and 6623 transitions. [2021-11-23 03:10:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:10:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 59.23076923076923) internal successors, (770), 12 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 770 [2021-11-23 03:10:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:10:58,887 INFO L225 Difference]: With dead ends: 3684 [2021-11-23 03:10:58,887 INFO L226 Difference]: Without dead ends: 2924 [2021-11-23 03:10:58,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:10:58,891 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 3002 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7927 mSolverCounterSat, 1408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3002 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 9335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1408 IncrementalHoareTripleChecker+Valid, 7927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:10:58,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3002 Valid, 823 Invalid, 9335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1408 Valid, 7927 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 03:10:58,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-11-23 03:10:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2924. [2021-11-23 03:10:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 1.2706123845364352) internal successors, (3714), 2923 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 3714 transitions. [2021-11-23 03:10:58,973 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 3714 transitions. Word has length 770 [2021-11-23 03:10:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:10:58,975 INFO L470 AbstractCegarLoop]: Abstraction has 2924 states and 3714 transitions. [2021-11-23 03:10:58,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.23076923076923) internal successors, (770), 12 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:10:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 3714 transitions. [2021-11-23 03:10:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2021-11-23 03:10:58,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:10:58,987 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:10:58,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:10:58,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:10:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:10:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash 906191869, now seen corresponding path program 1 times [2021-11-23 03:10:58,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:10:58,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265511305] [2021-11-23 03:10:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:10:58,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:10:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:10:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:10:59,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:10:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265511305] [2021-11-23 03:10:59,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265511305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:10:59,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:10:59,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:10:59,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086987275] [2021-11-23 03:10:59,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:10:59,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:10:59,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:10:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:10:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:10:59,543 INFO L87 Difference]: Start difference. First operand 2924 states and 3714 transitions. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:02,413 INFO L93 Difference]: Finished difference Result 5886 states and 8212 transitions. [2021-11-23 03:11:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:02,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 777 [2021-11-23 03:11:02,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:02,444 INFO L225 Difference]: With dead ends: 5886 [2021-11-23 03:11:02,444 INFO L226 Difference]: Without dead ends: 3682 [2021-11-23 03:11:02,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:02,457 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 1177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1177 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:02,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 979 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1177 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 03:11:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-11-23 03:11:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3682. [2021-11-23 03:11:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.351806574300462) internal successors, (4976), 3681 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4976 transitions. [2021-11-23 03:11:02,568 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4976 transitions. Word has length 777 [2021-11-23 03:11:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:02,570 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4976 transitions. [2021-11-23 03:11:02,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4976 transitions. [2021-11-23 03:11:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-23 03:11:02,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:02,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:02,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:11:02,589 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:02,590 INFO L85 PathProgramCache]: Analyzing trace with hash 865368519, now seen corresponding path program 1 times [2021-11-23 03:11:02,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:02,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095678392] [2021-11-23 03:11:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:02,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:11:02,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:02,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095678392] [2021-11-23 03:11:02,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095678392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:02,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:02,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:11:02,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224943873] [2021-11-23 03:11:02,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:02,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:02,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:02,828 INFO L87 Difference]: Start difference. First operand 3682 states and 4976 transitions. Second operand has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 2 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:05,795 INFO L93 Difference]: Finished difference Result 8918 states and 12786 transitions. [2021-11-23 03:11:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:05,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 2 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 782 [2021-11-23 03:11:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:05,828 INFO L225 Difference]: With dead ends: 8918 [2021-11-23 03:11:05,828 INFO L226 Difference]: Without dead ends: 5956 [2021-11-23 03:11:05,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:05,834 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 840 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 3266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:05,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 382 Invalid, 3266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 03:11:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5956 states. [2021-11-23 03:11:05,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5956 to 5956. [2021-11-23 03:11:05,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5956 states, 5955 states have (on average 1.3808564231738034) internal successors, (8223), 5955 states have internal predecessors, (8223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 8223 transitions. [2021-11-23 03:11:05,982 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 8223 transitions. Word has length 782 [2021-11-23 03:11:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:05,983 INFO L470 AbstractCegarLoop]: Abstraction has 5956 states and 8223 transitions. [2021-11-23 03:11:05,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 2 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 8223 transitions. [2021-11-23 03:11:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2021-11-23 03:11:06,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:06,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:06,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:11:06,001 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash -886816347, now seen corresponding path program 1 times [2021-11-23 03:11:06,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835216647] [2021-11-23 03:11:06,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:06,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 03:11:06,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:06,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835216647] [2021-11-23 03:11:06,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835216647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:06,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:06,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:11:06,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097307865] [2021-11-23 03:11:06,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:06,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:06,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:06,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:06,234 INFO L87 Difference]: Start difference. First operand 5956 states and 8223 transitions. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:08,944 INFO L93 Difference]: Finished difference Result 14224 states and 20963 transitions. [2021-11-23 03:11:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 801 [2021-11-23 03:11:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:09,000 INFO L225 Difference]: With dead ends: 14224 [2021-11-23 03:11:09,000 INFO L226 Difference]: Without dead ends: 8988 [2021-11-23 03:11:09,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:09,010 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 818 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:09,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 620 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1077 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 03:11:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8988 states. [2021-11-23 03:11:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8988 to 8988. [2021-11-23 03:11:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8988 states, 8987 states have (on average 1.3453877823522866) internal successors, (12091), 8987 states have internal predecessors, (12091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8988 states to 8988 states and 12091 transitions. [2021-11-23 03:11:09,271 INFO L78 Accepts]: Start accepts. Automaton has 8988 states and 12091 transitions. Word has length 801 [2021-11-23 03:11:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:09,272 INFO L470 AbstractCegarLoop]: Abstraction has 8988 states and 12091 transitions. [2021-11-23 03:11:09,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 8988 states and 12091 transitions. [2021-11-23 03:11:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2021-11-23 03:11:09,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:09,307 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:09,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:11:09,308 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 701218264, now seen corresponding path program 1 times [2021-11-23 03:11:09,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:09,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620473182] [2021-11-23 03:11:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:09,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 03:11:09,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:09,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620473182] [2021-11-23 03:11:09,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620473182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:09,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:09,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:11:09,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540097202] [2021-11-23 03:11:09,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:09,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:09,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:09,600 INFO L87 Difference]: Start difference. First operand 8988 states and 12091 transitions. Second operand has 3 states, 3 states have (on average 272.0) internal successors, (816), 2 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:12,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:12,536 INFO L93 Difference]: Finished difference Result 23320 states and 32567 transitions. [2021-11-23 03:11:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:12,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 272.0) internal successors, (816), 2 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 859 [2021-11-23 03:11:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:12,606 INFO L225 Difference]: With dead ends: 23320 [2021-11-23 03:11:12,606 INFO L226 Difference]: Without dead ends: 15052 [2021-11-23 03:11:12,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:12,622 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 727 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:12,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 647 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 03:11:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15052 states. [2021-11-23 03:11:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15052 to 15052. [2021-11-23 03:11:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15052 states, 15051 states have (on average 1.3652913427679223) internal successors, (20549), 15051 states have internal predecessors, (20549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15052 states to 15052 states and 20549 transitions. [2021-11-23 03:11:12,924 INFO L78 Accepts]: Start accepts. Automaton has 15052 states and 20549 transitions. Word has length 859 [2021-11-23 03:11:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:12,925 INFO L470 AbstractCegarLoop]: Abstraction has 15052 states and 20549 transitions. [2021-11-23 03:11:12,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.0) internal successors, (816), 2 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 15052 states and 20549 transitions. [2021-11-23 03:11:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 864 [2021-11-23 03:11:13,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:13,017 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:13,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:11:13,018 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash -363083150, now seen corresponding path program 1 times [2021-11-23 03:11:13,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:13,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139283049] [2021-11-23 03:11:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:13,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-23 03:11:13,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:13,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139283049] [2021-11-23 03:11:13,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139283049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:13,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:13,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:13,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562545059] [2021-11-23 03:11:13,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:13,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:13,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:13,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:13,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:13,299 INFO L87 Difference]: Start difference. First operand 15052 states and 20549 transitions. Second operand has 4 states, 4 states have (on average 195.75) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:18,160 INFO L93 Difference]: Finished difference Result 35448 states and 48773 transitions. [2021-11-23 03:11:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:11:18,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 195.75) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 863 [2021-11-23 03:11:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:18,204 INFO L225 Difference]: With dead ends: 35448 [2021-11-23 03:11:18,204 INFO L226 Difference]: Without dead ends: 21116 [2021-11-23 03:11:18,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:18,223 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 1517 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 5930 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 6376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 5930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:18,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1517 Valid, 437 Invalid, 6376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 5930 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-23 03:11:18,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21116 states. [2021-11-23 03:11:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21116 to 21116. [2021-11-23 03:11:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21116 states, 21115 states have (on average 1.2891783092588207) internal successors, (27221), 21115 states have internal predecessors, (27221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21116 states to 21116 states and 27221 transitions. [2021-11-23 03:11:18,578 INFO L78 Accepts]: Start accepts. Automaton has 21116 states and 27221 transitions. Word has length 863 [2021-11-23 03:11:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:18,579 INFO L470 AbstractCegarLoop]: Abstraction has 21116 states and 27221 transitions. [2021-11-23 03:11:18,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.75) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 21116 states and 27221 transitions. [2021-11-23 03:11:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2021-11-23 03:11:18,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:18,620 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:18,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:11:18,621 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash -179002320, now seen corresponding path program 1 times [2021-11-23 03:11:18,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:18,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100203913] [2021-11-23 03:11:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:18,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 03:11:18,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:18,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100203913] [2021-11-23 03:11:18,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100203913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:18,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:18,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:18,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34116076] [2021-11-23 03:11:18,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:18,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:18,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:18,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:18,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:18,874 INFO L87 Difference]: Start difference. First operand 21116 states and 27221 transitions. Second operand has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:21,841 INFO L93 Difference]: Finished difference Result 58188 states and 76159 transitions. [2021-11-23 03:11:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 865 [2021-11-23 03:11:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:21,915 INFO L225 Difference]: With dead ends: 58188 [2021-11-23 03:11:21,915 INFO L226 Difference]: Without dead ends: 37792 [2021-11-23 03:11:21,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:21,946 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 741 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 919 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 3138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:21,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 668 Invalid, 3138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [919 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 03:11:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37792 states. [2021-11-23 03:11:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37792 to 37792. [2021-11-23 03:11:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37792 states, 37791 states have (on average 1.2793786880474187) internal successors, (48349), 37791 states have internal predecessors, (48349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37792 states to 37792 states and 48349 transitions. [2021-11-23 03:11:22,698 INFO L78 Accepts]: Start accepts. Automaton has 37792 states and 48349 transitions. Word has length 865 [2021-11-23 03:11:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:22,701 INFO L470 AbstractCegarLoop]: Abstraction has 37792 states and 48349 transitions. [2021-11-23 03:11:22,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 37792 states and 48349 transitions. [2021-11-23 03:11:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2021-11-23 03:11:22,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:22,759 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:22,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:11:22,759 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:22,761 INFO L85 PathProgramCache]: Analyzing trace with hash 42024451, now seen corresponding path program 1 times [2021-11-23 03:11:22,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688919725] [2021-11-23 03:11:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:22,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 03:11:23,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:23,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688919725] [2021-11-23 03:11:23,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688919725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:23,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:23,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:23,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81186130] [2021-11-23 03:11:23,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:23,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:23,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:23,072 INFO L87 Difference]: Start difference. First operand 37792 states and 48349 transitions. Second operand has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:26,643 INFO L93 Difference]: Finished difference Result 74864 states and 95973 transitions. [2021-11-23 03:11:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 907 [2021-11-23 03:11:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:26,697 INFO L225 Difference]: With dead ends: 74864 [2021-11-23 03:11:26,697 INFO L226 Difference]: Without dead ends: 37792 [2021-11-23 03:11:26,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:26,726 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 778 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2775 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:26,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1059 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2775 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 03:11:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37792 states. [2021-11-23 03:11:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37792 to 37792. [2021-11-23 03:11:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37792 states, 37791 states have (on average 1.2455611124341774) internal successors, (47071), 37791 states have internal predecessors, (47071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:27,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37792 states to 37792 states and 47071 transitions. [2021-11-23 03:11:27,519 INFO L78 Accepts]: Start accepts. Automaton has 37792 states and 47071 transitions. Word has length 907 [2021-11-23 03:11:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:27,520 INFO L470 AbstractCegarLoop]: Abstraction has 37792 states and 47071 transitions. [2021-11-23 03:11:27,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 37792 states and 47071 transitions. [2021-11-23 03:11:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 941 [2021-11-23 03:11:27,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:27,735 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:27,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:11:27,736 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:27,737 INFO L85 PathProgramCache]: Analyzing trace with hash 567576972, now seen corresponding path program 1 times [2021-11-23 03:11:27,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:27,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413644676] [2021-11-23 03:11:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:27,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:11:28,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:28,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413644676] [2021-11-23 03:11:28,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413644676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:28,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:28,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:28,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844575118] [2021-11-23 03:11:28,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:28,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:28,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:28,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:28,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:28,191 INFO L87 Difference]: Start difference. First operand 37792 states and 47071 transitions. Second operand has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:31,611 INFO L93 Difference]: Finished difference Result 74864 states and 93417 transitions. [2021-11-23 03:11:31,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:31,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 940 [2021-11-23 03:11:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:31,648 INFO L225 Difference]: With dead ends: 74864 [2021-11-23 03:11:31,648 INFO L226 Difference]: Without dead ends: 37792 [2021-11-23 03:11:31,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:31,661 INFO L933 BasicCegarLoop]: 1332 mSDtfsCounter, 773 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:31,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1338 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1006 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 03:11:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37792 states. [2021-11-23 03:11:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37792 to 37792. [2021-11-23 03:11:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37792 states, 37791 states have (on average 1.1436320817125771) internal successors, (43219), 37791 states have internal predecessors, (43219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37792 states to 37792 states and 43219 transitions. [2021-11-23 03:11:32,186 INFO L78 Accepts]: Start accepts. Automaton has 37792 states and 43219 transitions. Word has length 940 [2021-11-23 03:11:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:32,186 INFO L470 AbstractCegarLoop]: Abstraction has 37792 states and 43219 transitions. [2021-11-23 03:11:32,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.0) internal successors, (915), 3 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 37792 states and 43219 transitions. [2021-11-23 03:11:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2021-11-23 03:11:32,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:32,234 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:32,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:11:32,234 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:32,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1514374937, now seen corresponding path program 1 times [2021-11-23 03:11:32,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:32,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273096039] [2021-11-23 03:11:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:32,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-23 03:11:32,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:32,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273096039] [2021-11-23 03:11:32,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273096039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:32,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:32,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:11:32,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567596754] [2021-11-23 03:11:32,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:32,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:32,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:32,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:32,694 INFO L87 Difference]: Start difference. First operand 37792 states and 43219 transitions. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 2 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:35,852 INFO L93 Difference]: Finished difference Result 101394 states and 117047 transitions. [2021-11-23 03:11:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 2 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 946 [2021-11-23 03:11:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:35,914 INFO L225 Difference]: With dead ends: 101394 [2021-11-23 03:11:35,914 INFO L226 Difference]: Without dead ends: 61290 [2021-11-23 03:11:35,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:35,935 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 911 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:35,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 470 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1063 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 03:11:35,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61290 states. [2021-11-23 03:11:36,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61290 to 51436. [2021-11-23 03:11:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51436 states, 51435 states have (on average 1.142082239720035) internal successors, (58743), 51435 states have internal predecessors, (58743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51436 states to 51436 states and 58743 transitions. [2021-11-23 03:11:36,864 INFO L78 Accepts]: Start accepts. Automaton has 51436 states and 58743 transitions. Word has length 946 [2021-11-23 03:11:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:36,864 INFO L470 AbstractCegarLoop]: Abstraction has 51436 states and 58743 transitions. [2021-11-23 03:11:36,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 2 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 51436 states and 58743 transitions. [2021-11-23 03:11:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1049 [2021-11-23 03:11:36,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:36,920 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:36,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:11:36,920 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1810672577, now seen corresponding path program 1 times [2021-11-23 03:11:36,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:36,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933224224] [2021-11-23 03:11:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:36,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-23 03:11:37,544 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:37,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933224224] [2021-11-23 03:11:37,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933224224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:37,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:37,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:11:37,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098287033] [2021-11-23 03:11:37,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:37,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:37,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:37,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:37,548 INFO L87 Difference]: Start difference. First operand 51436 states and 58743 transitions. Second operand has 3 states, 3 states have (on average 305.0) internal successors, (915), 2 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:40,870 INFO L93 Difference]: Finished difference Result 124134 states and 143371 transitions. [2021-11-23 03:11:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:40,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 305.0) internal successors, (915), 2 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1048 [2021-11-23 03:11:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:40,946 INFO L225 Difference]: With dead ends: 124134 [2021-11-23 03:11:40,946 INFO L226 Difference]: Without dead ends: 73418 [2021-11-23 03:11:40,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:40,965 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 815 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:40,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 303 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [996 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 03:11:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73418 states. [2021-11-23 03:11:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73418 to 72660. [2021-11-23 03:11:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72660 states, 72659 states have (on average 1.1310229978392217) internal successors, (82179), 72659 states have internal predecessors, (82179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72660 states to 72660 states and 82179 transitions. [2021-11-23 03:11:42,284 INFO L78 Accepts]: Start accepts. Automaton has 72660 states and 82179 transitions. Word has length 1048 [2021-11-23 03:11:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:42,285 INFO L470 AbstractCegarLoop]: Abstraction has 72660 states and 82179 transitions. [2021-11-23 03:11:42,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.0) internal successors, (915), 2 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 72660 states and 82179 transitions. [2021-11-23 03:11:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1258 [2021-11-23 03:11:42,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:42,340 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:42,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:11:42,341 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:42,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1746089181, now seen corresponding path program 1 times [2021-11-23 03:11:42,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:42,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967551827] [2021-11-23 03:11:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:42,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 823 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 03:11:42,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:42,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967551827] [2021-11-23 03:11:42,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967551827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:42,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:42,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:42,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620126016] [2021-11-23 03:11:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:42,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:42,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:42,819 INFO L87 Difference]: Start difference. First operand 72660 states and 82179 transitions. Second operand has 3 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:46,590 INFO L93 Difference]: Finished difference Result 161276 states and 182957 transitions. [2021-11-23 03:11:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:46,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1257 [2021-11-23 03:11:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:46,681 INFO L225 Difference]: With dead ends: 161276 [2021-11-23 03:11:46,681 INFO L226 Difference]: Without dead ends: 89336 [2021-11-23 03:11:46,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:11:46,704 INFO L933 BasicCegarLoop]: 1414 mSDtfsCounter, 606 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 3079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:46,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 1421 Invalid, 3079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 2538 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 03:11:46,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89336 states. [2021-11-23 03:11:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89336 to 86304. [2021-11-23 03:11:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86304 states, 86303 states have (on average 1.1100656987590234) internal successors, (95802), 86303 states have internal predecessors, (95802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86304 states to 86304 states and 95802 transitions. [2021-11-23 03:11:48,257 INFO L78 Accepts]: Start accepts. Automaton has 86304 states and 95802 transitions. Word has length 1257 [2021-11-23 03:11:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:48,258 INFO L470 AbstractCegarLoop]: Abstraction has 86304 states and 95802 transitions. [2021-11-23 03:11:48,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 380.6666666666667) internal successors, (1142), 3 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand 86304 states and 95802 transitions. [2021-11-23 03:11:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1273 [2021-11-23 03:11:48,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:48,319 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:48,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:11:48,319 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:48,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1591391455, now seen corresponding path program 1 times [2021-11-23 03:11:48,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:48,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914094979] [2021-11-23 03:11:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:48,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 791 proven. 89 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 03:11:48,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:48,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914094979] [2021-11-23 03:11:48,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914094979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:11:48,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629586854] [2021-11-23 03:11:48,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:48,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:11:48,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:11:48,997 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:11:49,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:11:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:49,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:11:49,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:11:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 633 proven. 0 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-11-23 03:11:52,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:11:52,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629586854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:52,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:11:52,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-23 03:11:52,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559684978] [2021-11-23 03:11:52,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:52,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:11:52,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:11:52,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:11:52,436 INFO L87 Difference]: Start difference. First operand 86304 states and 95802 transitions. Second operand has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:11:55,570 INFO L93 Difference]: Finished difference Result 173404 states and 192408 transitions. [2021-11-23 03:11:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:11:55,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1272 [2021-11-23 03:11:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:11:55,658 INFO L225 Difference]: With dead ends: 173404 [2021-11-23 03:11:55,658 INFO L226 Difference]: Without dead ends: 87062 [2021-11-23 03:11:55,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1276 GetRequests, 1271 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:11:55,686 INFO L933 BasicCegarLoop]: 1227 mSDtfsCounter, 168 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:11:55,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1234 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 03:11:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87062 states. [2021-11-23 03:11:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87062 to 84788. [2021-11-23 03:11:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84788 states, 84787 states have (on average 1.0952386568695673) internal successors, (92862), 84787 states have internal predecessors, (92862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84788 states to 84788 states and 92862 transitions. [2021-11-23 03:11:56,826 INFO L78 Accepts]: Start accepts. Automaton has 84788 states and 92862 transitions. Word has length 1272 [2021-11-23 03:11:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:11:56,827 INFO L470 AbstractCegarLoop]: Abstraction has 84788 states and 92862 transitions. [2021-11-23 03:11:56,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.6666666666667) internal successors, (986), 3 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:11:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 84788 states and 92862 transitions. [2021-11-23 03:11:57,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1398 [2021-11-23 03:11:57,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:11:57,329 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:11:57,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:11:57,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 03:11:57,530 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:11:57,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:11:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1343260285, now seen corresponding path program 1 times [2021-11-23 03:11:57,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:11:57,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750268498] [2021-11-23 03:11:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:11:57,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:11:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:11:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 666 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:11:58,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:11:58,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750268498] [2021-11-23 03:11:58,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750268498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:11:58,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:11:58,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:11:58,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41206554] [2021-11-23 03:11:58,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:11:58,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:11:58,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:11:58,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:11:58,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:11:58,232 INFO L87 Difference]: Start difference. First operand 84788 states and 92862 transitions. Second operand has 4 states, 4 states have (on average 346.5) internal successors, (1386), 3 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:02,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:02,743 INFO L93 Difference]: Finished difference Result 171130 states and 187345 transitions. [2021-11-23 03:12:02,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:12:02,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 346.5) internal successors, (1386), 3 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1397 [2021-11-23 03:12:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:02,847 INFO L225 Difference]: With dead ends: 171130 [2021-11-23 03:12:02,847 INFO L226 Difference]: Without dead ends: 86304 [2021-11-23 03:12:02,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:12:02,883 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 1918 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 1431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1918 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 4312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1431 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:02,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1918 Valid, 473 Invalid, 4312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1431 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 03:12:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86304 states. [2021-11-23 03:12:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86304 to 85546. [2021-11-23 03:12:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85546 states, 85545 states have (on average 1.0285931381144426) internal successors, (87991), 85545 states have internal predecessors, (87991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85546 states to 85546 states and 87991 transitions. [2021-11-23 03:12:04,041 INFO L78 Accepts]: Start accepts. Automaton has 85546 states and 87991 transitions. Word has length 1397 [2021-11-23 03:12:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:04,042 INFO L470 AbstractCegarLoop]: Abstraction has 85546 states and 87991 transitions. [2021-11-23 03:12:04,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 346.5) internal successors, (1386), 3 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 85546 states and 87991 transitions. [2021-11-23 03:12:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1409 [2021-11-23 03:12:04,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:04,104 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:04,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:12:04,104 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1339532111, now seen corresponding path program 1 times [2021-11-23 03:12:04,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:04,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680938651] [2021-11-23 03:12:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:04,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 1181 proven. 89 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-23 03:12:05,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680938651] [2021-11-23 03:12:05,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680938651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:12:05,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099858606] [2021-11-23 03:12:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:05,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:05,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:05,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:12:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:05,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:12:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 905 proven. 0 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-11-23 03:12:08,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:12:08,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099858606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:08,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:12:08,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-23 03:12:08,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23085530] [2021-11-23 03:12:08,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:08,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:12:08,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:08,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:12:08,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:12:08,784 INFO L87 Difference]: Start difference. First operand 85546 states and 87991 transitions. Second operand has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:11,389 INFO L93 Difference]: Finished difference Result 170372 states and 175259 transitions. [2021-11-23 03:12:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:12:11,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1408 [2021-11-23 03:12:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:11,470 INFO L225 Difference]: With dead ends: 170372 [2021-11-23 03:12:11,470 INFO L226 Difference]: Without dead ends: 85546 [2021-11-23 03:12:11,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1412 GetRequests, 1407 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:12:11,513 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 137 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:11,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 854 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 03:12:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85546 states. [2021-11-23 03:12:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85546 to 84788. [2021-11-23 03:12:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84788 states, 84787 states have (on average 1.0201328033778763) internal successors, (86494), 84787 states have internal predecessors, (86494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:12,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84788 states to 84788 states and 86494 transitions. [2021-11-23 03:12:12,727 INFO L78 Accepts]: Start accepts. Automaton has 84788 states and 86494 transitions. Word has length 1408 [2021-11-23 03:12:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:12,728 INFO L470 AbstractCegarLoop]: Abstraction has 84788 states and 86494 transitions. [2021-11-23 03:12:12,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.0) internal successors, (987), 3 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 84788 states and 86494 transitions. [2021-11-23 03:12:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3109 [2021-11-23 03:12:12,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:12,843 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:12,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:13,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:12:13,044 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:13,045 INFO L85 PathProgramCache]: Analyzing trace with hash 676450102, now seen corresponding path program 1 times [2021-11-23 03:12:13,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:13,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269355271] [2021-11-23 03:12:13,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:13,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8988 backedges. 3861 proven. 89 refuted. 0 times theorem prover too weak. 5038 trivial. 0 not checked. [2021-11-23 03:12:15,606 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:15,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269355271] [2021-11-23 03:12:15,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269355271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:12:15,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321020409] [2021-11-23 03:12:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:15,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:15,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:15,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:15,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:12:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:16,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 3652 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:12:16,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8988 backedges. 5635 proven. 0 refuted. 0 times theorem prover too weak. 3353 trivial. 0 not checked. [2021-11-23 03:12:21,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:12:21,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321020409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:21,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:12:21,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-23 03:12:21,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985714711] [2021-11-23 03:12:21,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:21,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:12:21,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:21,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:12:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:12:21,204 INFO L87 Difference]: Start difference. First operand 84788 states and 86494 transitions. Second operand has 3 states, 3 states have (on average 444.0) internal successors, (1332), 3 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:23,621 INFO L93 Difference]: Finished difference Result 169614 states and 173024 transitions. [2021-11-23 03:12:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:12:23,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 444.0) internal successors, (1332), 3 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3108 [2021-11-23 03:12:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:23,701 INFO L225 Difference]: With dead ends: 169614 [2021-11-23 03:12:23,701 INFO L226 Difference]: Without dead ends: 85546 [2021-11-23 03:12:23,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3112 GetRequests, 3107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:12:23,742 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 576 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:23,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 85 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 03:12:23,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85546 states. [2021-11-23 03:12:24,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85546 to 84788. [2021-11-23 03:12:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84788 states, 84787 states have (on average 1.0164294054513074) internal successors, (86180), 84787 states have internal predecessors, (86180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84788 states to 84788 states and 86180 transitions. [2021-11-23 03:12:24,865 INFO L78 Accepts]: Start accepts. Automaton has 84788 states and 86180 transitions. Word has length 3108 [2021-11-23 03:12:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:24,867 INFO L470 AbstractCegarLoop]: Abstraction has 84788 states and 86180 transitions. [2021-11-23 03:12:24,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 444.0) internal successors, (1332), 3 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 84788 states and 86180 transitions. [2021-11-23 03:12:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4492 [2021-11-23 03:12:25,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:25,548 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:12:25,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 03:12:25,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:25,762 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:25,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1440947201, now seen corresponding path program 1 times [2021-11-23 03:12:25,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:25,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540158087] [2021-11-23 03:12:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:25,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18380 backedges. 5583 proven. 89 refuted. 0 times theorem prover too weak. 12708 trivial. 0 not checked. [2021-11-23 03:12:30,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:30,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540158087] [2021-11-23 03:12:30,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540158087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:12:30,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858397772] [2021-11-23 03:12:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:30,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:30,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:30,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:30,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:12:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:32,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 5153 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:12:32,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:12:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18380 backedges. 11053 proven. 0 refuted. 0 times theorem prover too weak. 7327 trivial. 0 not checked. [2021-11-23 03:12:38,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:12:38,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858397772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:12:38,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:12:38,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-23 03:12:38,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189890241] [2021-11-23 03:12:38,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:12:38,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:12:38,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:12:38,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:12:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:12:38,545 INFO L87 Difference]: Start difference. First operand 84788 states and 86180 transitions. Second operand has 3 states, 3 states have (on average 577.3333333333334) internal successors, (1732), 3 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:12:41,181 INFO L93 Difference]: Finished difference Result 192354 states and 195592 transitions. [2021-11-23 03:12:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:12:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 577.3333333333334) internal successors, (1732), 3 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4491 [2021-11-23 03:12:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:12:41,287 INFO L225 Difference]: With dead ends: 192354 [2021-11-23 03:12:41,287 INFO L226 Difference]: Without dead ends: 107528 [2021-11-23 03:12:41,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4495 GetRequests, 4490 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:12:41,333 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 133 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:12:41,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 963 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 03:12:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107528 states. [2021-11-23 03:12:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107528 to 98432. [2021-11-23 03:12:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98432 states, 98431 states have (on average 1.0160620129837146) internal successors, (100012), 98431 states have internal predecessors, (100012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98432 states to 98432 states and 100012 transitions. [2021-11-23 03:12:43,014 INFO L78 Accepts]: Start accepts. Automaton has 98432 states and 100012 transitions. Word has length 4491 [2021-11-23 03:12:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:12:43,016 INFO L470 AbstractCegarLoop]: Abstraction has 98432 states and 100012 transitions. [2021-11-23 03:12:43,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 577.3333333333334) internal successors, (1732), 3 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:12:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 98432 states and 100012 transitions. [2021-11-23 03:12:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5325 [2021-11-23 03:12:43,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:12:43,990 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:12:44,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:12:44,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 03:12:44,218 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:12:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:12:44,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1541568473, now seen corresponding path program 1 times [2021-11-23 03:12:44,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:12:44,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485509567] [2021-11-23 03:12:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:44,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:12:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 26463 backedges. 6718 proven. 89 refuted. 0 times theorem prover too weak. 19656 trivial. 0 not checked. [2021-11-23 03:12:50,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:12:50,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485509567] [2021-11-23 03:12:50,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485509567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:12:50,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721715577] [2021-11-23 03:12:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:12:50,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:12:50,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:12:50,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:12:50,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bbef8c9-1a3d-44e2-b0a9-1b4654b65712/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:12:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:12:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 6078 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:12:52,342 INFO L286 TraceCheckSpWp]: Computing forward predicates...