./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:21:40,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:21:40,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:21:40,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:21:40,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:21:40,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:21:40,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:21:40,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:21:40,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:21:40,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:21:40,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:21:40,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:21:40,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:21:40,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:21:40,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:21:40,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:21:40,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:21:40,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:21:40,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:21:40,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:21:40,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:21:40,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:21:40,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:21:40,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:21:40,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:21:40,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:21:40,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:21:40,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:21:40,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:21:40,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:21:40,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:21:40,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:21:40,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:21:40,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:21:40,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:21:40,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:21:40,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:21:40,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:21:40,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:21:40,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:21:40,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:21:40,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:21:40,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:21:40,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:21:40,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:21:40,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:21:40,438 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:21:40,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:21:40,438 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:21:40,439 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:21:40,439 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:21:40,439 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:21:40,439 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:21:40,439 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:21:40,439 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:21:40,440 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:21:40,440 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:21:40,440 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:21:40,440 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:21:40,440 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:21:40,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:21:40,441 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:21:40,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:21:40,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:21:40,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:21:40,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:21:40,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:21:40,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:21:40,442 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:21:40,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:21:40,442 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:21:40,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:21:40,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:21:40,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:21:40,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:21:40,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:21:40,443 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:21:40,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:21:40,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:21:40,444 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:21:40,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:21:40,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:21:40,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:21:40,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff [2022-12-14 14:21:40,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:21:40,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:21:40,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:21:40,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:21:40,644 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:21:40,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2022-12-14 14:21:43,197 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:21:43,442 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:21:43,443 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2022-12-14 14:21:43,459 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/data/ee0a511b8/65b7ec33d64746b7b3aa604b6c45e05e/FLAGa290f1f72 [2022-12-14 14:21:43,469 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/data/ee0a511b8/65b7ec33d64746b7b3aa604b6c45e05e [2022-12-14 14:21:43,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:21:43,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:21:43,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:21:43,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:21:43,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:21:43,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:43,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ad9700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43, skipping insertion in model container [2022-12-14 14:21:43,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:43,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:21:43,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:21:43,822 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2022-12-14 14:21:43,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:21:43,833 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:21:43,898 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2022-12-14 14:21:43,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:21:43,915 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:21:43,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43 WrapperNode [2022-12-14 14:21:43,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:21:43,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:21:43,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:21:43,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:21:43,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:43,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:43,979 INFO L138 Inliner]: procedures = 89, calls = 327, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 771 [2022-12-14 14:21:43,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:21:43,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:21:43,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:21:43,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:21:43,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:43,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:43,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:43,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:44,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:44,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:44,025 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:44,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:44,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:21:44,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:21:44,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:21:44,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:21:44,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (1/1) ... [2022-12-14 14:21:44,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:21:44,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:21:44,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:21:44,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:21:44,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:21:44,105 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 14:21:44,105 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 14:21:44,105 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 14:21:44,105 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 14:21:44,105 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 14:21:44,105 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 14:21:44,105 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 14:21:44,106 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 14:21:44,106 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 14:21:44,106 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 14:21:44,106 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 14:21:44,106 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 14:21:44,106 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 14:21:44,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 14:21:44,107 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 14:21:44,107 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 14:21:44,107 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 14:21:44,107 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 14:21:44,107 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 14:21:44,107 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 14:21:44,107 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 14:21:44,120 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 14:21:44,120 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 14:21:44,121 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 14:21:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 14:21:44,122 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 14:21:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 14:21:44,122 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 14:21:44,122 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 14:21:44,122 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 14:21:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-12-14 14:21:44,123 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-12-14 14:21:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:21:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 14:21:44,123 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 14:21:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 14:21:44,123 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 14:21:44,123 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 14:21:44,124 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 14:21:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:21:44,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:21:44,124 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 14:21:44,124 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 14:21:44,242 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:21:44,244 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:21:45,004 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:21:45,407 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:21:45,407 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 14:21:45,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:21:45 BoogieIcfgContainer [2022-12-14 14:21:45,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:21:45,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:21:45,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:21:45,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:21:45,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:21:43" (1/3) ... [2022-12-14 14:21:45,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f8466a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:21:45, skipping insertion in model container [2022-12-14 14:21:45,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:21:43" (2/3) ... [2022-12-14 14:21:45,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f8466a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:21:45, skipping insertion in model container [2022-12-14 14:21:45,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:21:45" (3/3) ... [2022-12-14 14:21:45,415 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product09.cil.c [2022-12-14 14:21:45,440 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:21:45,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:21:45,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:21:45,501 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@73e1bf83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:21:45,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:21:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 332 states, 227 states have (on average 1.6299559471365639) internal successors, (370), 248 states have internal predecessors, (370), 83 states have call successors, (83), 20 states have call predecessors, (83), 20 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) [2022-12-14 14:21:45,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 14:21:45,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:45,523 INFO L195 NwaCegarLoop]: 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] [2022-12-14 14:21:45,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:45,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:45,529 INFO L85 PathProgramCache]: Analyzing trace with hash 816034651, now seen corresponding path program 1 times [2022-12-14 14:21:45,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:45,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076311968] [2022-12-14 14:21:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:45,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:21:45,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:45,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076311968] [2022-12-14 14:21:45,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076311968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:45,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:45,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:21:45,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465417721] [2022-12-14 14:21:45,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 14:21:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:45,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 14:21:45,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:21:45,838 INFO L87 Difference]: Start difference. First operand has 332 states, 227 states have (on average 1.6299559471365639) internal successors, (370), 248 states have internal predecessors, (370), 83 states have call successors, (83), 20 states have call predecessors, (83), 20 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 14:21:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:45,952 INFO L93 Difference]: Finished difference Result 350 states and 563 transitions. [2022-12-14 14:21:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 14:21:45,955 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 51 [2022-12-14 14:21:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:45,964 INFO L225 Difference]: With dead ends: 350 [2022-12-14 14:21:45,964 INFO L226 Difference]: Without dead ends: 328 [2022-12-14 14:21:45,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:21:45,969 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:45,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 495 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:21:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-12-14 14:21:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-12-14 14:21:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 225 states have (on average 1.6177777777777778) internal successors, (364), 244 states have internal predecessors, (364), 83 states have call successors, (83), 20 states have call predecessors, (83), 19 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 14:21:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 525 transitions. [2022-12-14 14:21:46,018 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 525 transitions. Word has length 51 [2022-12-14 14:21:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:46,019 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 525 transitions. [2022-12-14 14:21:46,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 14:21:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 525 transitions. [2022-12-14 14:21:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 14:21:46,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:46,022 INFO L195 NwaCegarLoop]: 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] [2022-12-14 14:21:46,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:21:46,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2013095101, now seen corresponding path program 1 times [2022-12-14 14:21:46,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:46,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795009014] [2022-12-14 14:21:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:46,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:21:46,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:46,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795009014] [2022-12-14 14:21:46,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795009014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:46,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:46,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 14:21:46,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222552385] [2022-12-14 14:21:46,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:46,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:21:46,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:46,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:21:46,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:21:46,310 INFO L87 Difference]: Start difference. First operand 328 states and 525 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-14 14:21:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:47,836 INFO L93 Difference]: Finished difference Result 1093 states and 1782 transitions. [2022-12-14 14:21:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 14:21:47,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2022-12-14 14:21:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:47,843 INFO L225 Difference]: With dead ends: 1093 [2022-12-14 14:21:47,843 INFO L226 Difference]: Without dead ends: 781 [2022-12-14 14:21:47,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:21:47,846 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1578 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:47,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1631 Valid, 1417 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 14:21:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-12-14 14:21:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 743. [2022-12-14 14:21:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 530 states have (on average 1.6471698113207547) internal successors, (873), 565 states have internal predecessors, (873), 171 states have call successors, (171), 39 states have call predecessors, (171), 41 states have return successors, (172), 163 states have call predecessors, (172), 166 states have call successors, (172) [2022-12-14 14:21:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1216 transitions. [2022-12-14 14:21:47,921 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1216 transitions. Word has length 52 [2022-12-14 14:21:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:47,922 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1216 transitions. [2022-12-14 14:21:47,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-14 14:21:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1216 transitions. [2022-12-14 14:21:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 14:21:47,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:47,925 INFO L195 NwaCegarLoop]: 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] [2022-12-14 14:21:47,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:21:47,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1416825966, now seen corresponding path program 1 times [2022-12-14 14:21:47,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:47,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814410864] [2022-12-14 14:21:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:47,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:21:48,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:48,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814410864] [2022-12-14 14:21:48,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814410864] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:48,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:48,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:21:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878653306] [2022-12-14 14:21:48,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:48,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:21:48,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:21:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:21:48,148 INFO L87 Difference]: Start difference. First operand 743 states and 1216 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:21:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:48,308 INFO L93 Difference]: Finished difference Result 1231 states and 2018 transitions. [2022-12-14 14:21:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:21:48,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2022-12-14 14:21:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:48,314 INFO L225 Difference]: With dead ends: 1231 [2022-12-14 14:21:48,315 INFO L226 Difference]: Without dead ends: 791 [2022-12-14 14:21:48,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:21:48,318 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 30 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2005 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:48,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2005 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:21:48,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-12-14 14:21:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 755. [2022-12-14 14:21:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 539 states have (on average 1.6363636363636365) internal successors, (882), 574 states have internal predecessors, (882), 171 states have call successors, (171), 39 states have call predecessors, (171), 44 states have return successors, (178), 166 states have call predecessors, (178), 166 states have call successors, (178) [2022-12-14 14:21:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1231 transitions. [2022-12-14 14:21:48,377 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1231 transitions. Word has length 56 [2022-12-14 14:21:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:48,377 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1231 transitions. [2022-12-14 14:21:48,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:21:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1231 transitions. [2022-12-14 14:21:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 14:21:48,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:48,380 INFO L195 NwaCegarLoop]: 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] [2022-12-14 14:21:48,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:21:48,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:48,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1860564922, now seen corresponding path program 1 times [2022-12-14 14:21:48,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:48,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835301663] [2022-12-14 14:21:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:48,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:21:48,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:48,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835301663] [2022-12-14 14:21:48,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835301663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:48,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:48,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 14:21:48,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698742411] [2022-12-14 14:21:48,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:48,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:21:48,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:48,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:21:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:21:48,670 INFO L87 Difference]: Start difference. First operand 755 states and 1231 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 14:21:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:50,150 INFO L93 Difference]: Finished difference Result 1689 states and 2743 transitions. [2022-12-14 14:21:50,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:21:50,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2022-12-14 14:21:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:50,158 INFO L225 Difference]: With dead ends: 1689 [2022-12-14 14:21:50,158 INFO L226 Difference]: Without dead ends: 1141 [2022-12-14 14:21:50,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:21:50,162 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 2331 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 970 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 970 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:50,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2459 Valid, 960 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [970 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 14:21:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-12-14 14:21:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1069. [2022-12-14 14:21:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 752 states have (on average 1.5890957446808511) internal successors, (1195), 804 states have internal predecessors, (1195), 246 states have call successors, (246), 62 states have call predecessors, (246), 70 states have return successors, (262), 239 states have call predecessors, (262), 241 states have call successors, (262) [2022-12-14 14:21:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1703 transitions. [2022-12-14 14:21:50,244 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1703 transitions. Word has length 60 [2022-12-14 14:21:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:50,244 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1703 transitions. [2022-12-14 14:21:50,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 14:21:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1703 transitions. [2022-12-14 14:21:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 14:21:50,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:50,246 INFO L195 NwaCegarLoop]: 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] [2022-12-14 14:21:50,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:21:50,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1532795641, now seen corresponding path program 1 times [2022-12-14 14:21:50,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:50,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107910225] [2022-12-14 14:21:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:50,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:21:50,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:50,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107910225] [2022-12-14 14:21:50,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107910225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:50,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:50,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:21:50,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380021169] [2022-12-14 14:21:50,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:50,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:21:50,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:21:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:21:50,383 INFO L87 Difference]: Start difference. First operand 1069 states and 1703 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:21:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:50,571 INFO L93 Difference]: Finished difference Result 2075 states and 3361 transitions. [2022-12-14 14:21:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:21:50,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2022-12-14 14:21:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:50,579 INFO L225 Difference]: With dead ends: 2075 [2022-12-14 14:21:50,579 INFO L226 Difference]: Without dead ends: 1069 [2022-12-14 14:21:50,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:21:50,584 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 210 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:50,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1326 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:21:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-12-14 14:21:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1069. [2022-12-14 14:21:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 752 states have (on average 1.5465425531914894) internal successors, (1163), 804 states have internal predecessors, (1163), 246 states have call successors, (246), 62 states have call predecessors, (246), 70 states have return successors, (262), 239 states have call predecessors, (262), 241 states have call successors, (262) [2022-12-14 14:21:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1671 transitions. [2022-12-14 14:21:50,668 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1671 transitions. Word has length 63 [2022-12-14 14:21:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:50,669 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 1671 transitions. [2022-12-14 14:21:50,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:21:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1671 transitions. [2022-12-14 14:21:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 14:21:50,670 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:50,671 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:21:50,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:21:50,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1656935645, now seen corresponding path program 1 times [2022-12-14 14:21:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:50,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786624332] [2022-12-14 14:21:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:50,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:21:50,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:50,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786624332] [2022-12-14 14:21:50,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786624332] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:50,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:50,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 14:21:50,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725512319] [2022-12-14 14:21:50,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:50,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:21:50,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:50,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:21:50,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:21:50,857 INFO L87 Difference]: Start difference. First operand 1069 states and 1671 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:21:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:52,063 INFO L93 Difference]: Finished difference Result 2007 states and 3144 transitions. [2022-12-14 14:21:52,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:21:52,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2022-12-14 14:21:52,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:52,070 INFO L225 Difference]: With dead ends: 2007 [2022-12-14 14:21:52,070 INFO L226 Difference]: Without dead ends: 1202 [2022-12-14 14:21:52,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:21:52,075 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 869 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:52,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 1276 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2165 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 14:21:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-12-14 14:21:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1096. [2022-12-14 14:21:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 770 states have (on average 1.5389610389610389) internal successors, (1185), 826 states have internal predecessors, (1185), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-12-14 14:21:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1705 transitions. [2022-12-14 14:21:52,154 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1705 transitions. Word has length 65 [2022-12-14 14:21:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:52,154 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1705 transitions. [2022-12-14 14:21:52,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 14:21:52,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1705 transitions. [2022-12-14 14:21:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 14:21:52,156 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:52,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:21:52,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:21:52,156 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:52,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1580418719, now seen corresponding path program 1 times [2022-12-14 14:21:52,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:52,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158496496] [2022-12-14 14:21:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:52,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:21:52,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:52,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158496496] [2022-12-14 14:21:52,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158496496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:52,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:52,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:21:52,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026750424] [2022-12-14 14:21:52,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:52,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:21:52,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:21:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:21:52,306 INFO L87 Difference]: Start difference. First operand 1096 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 14:21:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:52,637 INFO L93 Difference]: Finished difference Result 1168 states and 1818 transitions. [2022-12-14 14:21:52,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:21:52,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 72 [2022-12-14 14:21:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:52,642 INFO L225 Difference]: With dead ends: 1168 [2022-12-14 14:21:52,642 INFO L226 Difference]: Without dead ends: 1153 [2022-12-14 14:21:52,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:21:52,643 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 608 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:52,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1279 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:21:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-12-14 14:21:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1100. [2022-12-14 14:21:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 774 states have (on average 1.5361757105943152) internal successors, (1189), 830 states have internal predecessors, (1189), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-12-14 14:21:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1709 transitions. [2022-12-14 14:21:52,693 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1709 transitions. Word has length 72 [2022-12-14 14:21:52,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:52,693 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1709 transitions. [2022-12-14 14:21:52,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-14 14:21:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1709 transitions. [2022-12-14 14:21:52,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 14:21:52,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:52,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:21:52,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:21:52,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:52,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2073861318, now seen corresponding path program 1 times [2022-12-14 14:21:52,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:52,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494772923] [2022-12-14 14:21:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:52,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:21:52,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:52,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494772923] [2022-12-14 14:21:52,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494772923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:52,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:52,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 14:21:52,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557673760] [2022-12-14 14:21:52,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:52,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:21:52,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:52,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:21:52,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:21:52,861 INFO L87 Difference]: Start difference. First operand 1100 states and 1709 transitions. Second operand has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 14:21:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:53,078 INFO L93 Difference]: Finished difference Result 1119 states and 1733 transitions. [2022-12-14 14:21:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:21:53,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 74 [2022-12-14 14:21:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:53,084 INFO L225 Difference]: With dead ends: 1119 [2022-12-14 14:21:53,084 INFO L226 Difference]: Without dead ends: 1104 [2022-12-14 14:21:53,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:21:53,085 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 257 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:53,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2550 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:21:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-12-14 14:21:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1100. [2022-12-14 14:21:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 774 states have (on average 1.5322997416020672) internal successors, (1186), 830 states have internal predecessors, (1186), 247 states have call successors, (247), 67 states have call predecessors, (247), 78 states have return successors, (273), 239 states have call predecessors, (273), 242 states have call successors, (273) [2022-12-14 14:21:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1706 transitions. [2022-12-14 14:21:53,143 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1706 transitions. Word has length 74 [2022-12-14 14:21:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:53,144 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1706 transitions. [2022-12-14 14:21:53,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2022-12-14 14:21:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1706 transitions. [2022-12-14 14:21:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 14:21:53,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:53,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:21:53,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:21:53,146 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:53,147 INFO L85 PathProgramCache]: Analyzing trace with hash -881375227, now seen corresponding path program 1 times [2022-12-14 14:21:53,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:53,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644200160] [2022-12-14 14:21:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:53,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:21:53,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:53,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644200160] [2022-12-14 14:21:53,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644200160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:53,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:53,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:21:53,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997501674] [2022-12-14 14:21:53,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:53,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:21:53,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:21:53,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:21:53,223 INFO L87 Difference]: Start difference. First operand 1100 states and 1706 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 14:21:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:53,432 INFO L93 Difference]: Finished difference Result 3229 states and 5050 transitions. [2022-12-14 14:21:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:21:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2022-12-14 14:21:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:53,452 INFO L225 Difference]: With dead ends: 3229 [2022-12-14 14:21:53,452 INFO L226 Difference]: Without dead ends: 2145 [2022-12-14 14:21:53,456 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:21:53,457 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 473 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:53,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1049 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:21:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2022-12-14 14:21:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 2104. [2022-12-14 14:21:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1508 states have (on average 1.539787798408488) internal successors, (2322), 1616 states have internal predecessors, (2322), 448 states have call successors, (448), 123 states have call predecessors, (448), 147 states have return successors, (517), 420 states have call predecessors, (517), 443 states have call successors, (517) [2022-12-14 14:21:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3287 transitions. [2022-12-14 14:21:53,574 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3287 transitions. Word has length 84 [2022-12-14 14:21:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:53,575 INFO L495 AbstractCegarLoop]: Abstraction has 2104 states and 3287 transitions. [2022-12-14 14:21:53,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 14:21:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3287 transitions. [2022-12-14 14:21:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 14:21:53,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:53,576 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:21:53,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:21:53,576 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1513861911, now seen corresponding path program 1 times [2022-12-14 14:21:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:53,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404026387] [2022-12-14 14:21:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:53,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:21:53,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:53,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404026387] [2022-12-14 14:21:53,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404026387] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:53,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:53,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:21:53,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960665700] [2022-12-14 14:21:53,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:53,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:21:53,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:53,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:21:53,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:21:53,637 INFO L87 Difference]: Start difference. First operand 2104 states and 3287 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:21:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:53,951 INFO L93 Difference]: Finished difference Result 6240 states and 9836 transitions. [2022-12-14 14:21:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:21:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2022-12-14 14:21:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:53,973 INFO L225 Difference]: With dead ends: 6240 [2022-12-14 14:21:53,973 INFO L226 Difference]: Without dead ends: 4155 [2022-12-14 14:21:53,982 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:21:53,983 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 472 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:53,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1055 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:21:53,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2022-12-14 14:21:54,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 4113. [2022-12-14 14:21:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 2977 states have (on average 1.5418206247900572) internal successors, (4590), 3189 states have internal predecessors, (4590), 850 states have call successors, (850), 235 states have call predecessors, (850), 285 states have return successors, (1033), 782 states have call predecessors, (1033), 845 states have call successors, (1033) [2022-12-14 14:21:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 6473 transitions. [2022-12-14 14:21:54,185 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 6473 transitions. Word has length 82 [2022-12-14 14:21:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:54,185 INFO L495 AbstractCegarLoop]: Abstraction has 4113 states and 6473 transitions. [2022-12-14 14:21:54,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:21:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 6473 transitions. [2022-12-14 14:21:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 14:21:54,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:54,187 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:21:54,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 14:21:54,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:54,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:54,188 INFO L85 PathProgramCache]: Analyzing trace with hash 314515836, now seen corresponding path program 1 times [2022-12-14 14:21:54,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:54,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240508634] [2022-12-14 14:21:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:21:54,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:54,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240508634] [2022-12-14 14:21:54,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240508634] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:54,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:54,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:21:54,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033645679] [2022-12-14 14:21:54,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:54,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:21:54,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:54,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:21:54,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:21:54,247 INFO L87 Difference]: Start difference. First operand 4113 states and 6473 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:21:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:54,696 INFO L93 Difference]: Finished difference Result 12263 states and 19539 transitions. [2022-12-14 14:21:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:21:54,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2022-12-14 14:21:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:54,727 INFO L225 Difference]: With dead ends: 12263 [2022-12-14 14:21:54,727 INFO L226 Difference]: Without dead ends: 8175 [2022-12-14 14:21:54,738 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:21:54,739 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 471 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:54,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1061 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:21:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2022-12-14 14:21:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8132. [2022-12-14 14:21:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8132 states, 5916 states have (on average 1.5409060175794456) internal successors, (9116), 6336 states have internal predecessors, (9116), 1654 states have call successors, (1654), 459 states have call predecessors, (1654), 561 states have return successors, (2167), 1506 states have call predecessors, (2167), 1649 states have call successors, (2167) [2022-12-14 14:21:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8132 states to 8132 states and 12937 transitions. [2022-12-14 14:21:55,139 INFO L78 Accepts]: Start accepts. Automaton has 8132 states and 12937 transitions. Word has length 83 [2022-12-14 14:21:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:55,139 INFO L495 AbstractCegarLoop]: Abstraction has 8132 states and 12937 transitions. [2022-12-14 14:21:55,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:21:55,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8132 states and 12937 transitions. [2022-12-14 14:21:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 14:21:55,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:55,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:21:55,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 14:21:55,142 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:55,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1974567680, now seen corresponding path program 1 times [2022-12-14 14:21:55,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:55,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928368477] [2022-12-14 14:21:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:55,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:21:55,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:55,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928368477] [2022-12-14 14:21:55,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928368477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:55,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:55,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:21:55,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781031326] [2022-12-14 14:21:55,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:55,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:21:55,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:55,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:21:55,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:21:55,207 INFO L87 Difference]: Start difference. First operand 8132 states and 12937 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 14:21:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:55,982 INFO L93 Difference]: Finished difference Result 24310 states and 39440 transitions. [2022-12-14 14:21:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:21:55,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2022-12-14 14:21:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:56,052 INFO L225 Difference]: With dead ends: 24310 [2022-12-14 14:21:56,052 INFO L226 Difference]: Without dead ends: 16215 [2022-12-14 14:21:56,074 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:21:56,075 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 470 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:56,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1067 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:21:56,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16215 states. [2022-12-14 14:21:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16215 to 16171. [2022-12-14 14:21:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16171 states, 11795 states have (on average 1.538448495125053) internal successors, (18146), 12631 states have internal predecessors, (18146), 3262 states have call successors, (3262), 907 states have call predecessors, (3262), 1113 states have return successors, (4813), 2954 states have call predecessors, (4813), 3257 states have call successors, (4813) [2022-12-14 14:21:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16171 states to 16171 states and 26221 transitions. [2022-12-14 14:21:57,042 INFO L78 Accepts]: Start accepts. Automaton has 16171 states and 26221 transitions. Word has length 87 [2022-12-14 14:21:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:57,042 INFO L495 AbstractCegarLoop]: Abstraction has 16171 states and 26221 transitions. [2022-12-14 14:21:57,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 14:21:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 16171 states and 26221 transitions. [2022-12-14 14:21:57,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 14:21:57,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:57,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:21:57,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 14:21:57,045 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:57,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:57,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1081658569, now seen corresponding path program 1 times [2022-12-14 14:21:57,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:57,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080168469] [2022-12-14 14:21:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:57,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:21:57,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:57,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080168469] [2022-12-14 14:21:57,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080168469] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:57,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:21:57,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:21:57,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684794642] [2022-12-14 14:21:57,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:57,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:21:57,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:57,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:21:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:21:57,119 INFO L87 Difference]: Start difference. First operand 16171 states and 26221 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 14:21:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:21:57,771 INFO L93 Difference]: Finished difference Result 17221 states and 28012 transitions. [2022-12-14 14:21:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:21:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2022-12-14 14:21:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:21:57,827 INFO L225 Difference]: With dead ends: 17221 [2022-12-14 14:21:57,827 INFO L226 Difference]: Without dead ends: 17210 [2022-12-14 14:21:57,833 INFO L412 NwaCegarLoop]: 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 [2022-12-14 14:21:57,834 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 456 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:21:57,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1065 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:21:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17210 states. [2022-12-14 14:21:58,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17210 to 17167. [2022-12-14 14:21:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17167 states, 12522 states have (on average 1.537374221370388) internal successors, (19251), 13410 states have internal predecessors, (19251), 3463 states have call successors, (3463), 963 states have call predecessors, (3463), 1181 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-12-14 14:21:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17167 states to 17167 states and 27935 transitions. [2022-12-14 14:21:58,564 INFO L78 Accepts]: Start accepts. Automaton has 17167 states and 27935 transitions. Word has length 88 [2022-12-14 14:21:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:21:58,564 INFO L495 AbstractCegarLoop]: Abstraction has 17167 states and 27935 transitions. [2022-12-14 14:21:58,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 14:21:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 17167 states and 27935 transitions. [2022-12-14 14:21:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 14:21:58,568 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:21:58,568 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:21:58,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 14:21:58,569 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:21:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:21:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1448580118, now seen corresponding path program 1 times [2022-12-14 14:21:58,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:21:58,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844404197] [2022-12-14 14:21:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:21:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 14:21:58,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:21:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844404197] [2022-12-14 14:21:58,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844404197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:21:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281161939] [2022-12-14 14:21:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:21:58,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:21:58,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:21:58,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:21:58,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:21:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:21:58,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:21:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:21:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 14:21:59,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:21:59,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281161939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:21:59,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:21:59,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 14:21:59,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909980597] [2022-12-14 14:21:59,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:21:59,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:21:59,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:21:59,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:21:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:21:59,054 INFO L87 Difference]: Start difference. First operand 17167 states and 27935 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 14:22:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:22:00,288 INFO L93 Difference]: Finished difference Result 36306 states and 60697 transitions. [2022-12-14 14:22:00,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:22:00,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2022-12-14 14:22:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:22:00,381 INFO L225 Difference]: With dead ends: 36306 [2022-12-14 14:22:00,381 INFO L226 Difference]: Without dead ends: 19156 [2022-12-14 14:22:00,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:22:00,451 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 213 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:22:00,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1221 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:22:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19156 states. [2022-12-14 14:22:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19156 to 19156. [2022-12-14 14:22:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19156 states, 14460 states have (on average 1.5887966804979252) internal successors, (22974), 15348 states have internal predecessors, (22974), 3463 states have call successors, (3463), 1014 states have call predecessors, (3463), 1232 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-12-14 14:22:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19156 states to 19156 states and 31658 transitions. [2022-12-14 14:22:01,257 INFO L78 Accepts]: Start accepts. Automaton has 19156 states and 31658 transitions. Word has length 128 [2022-12-14 14:22:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:22:01,258 INFO L495 AbstractCegarLoop]: Abstraction has 19156 states and 31658 transitions. [2022-12-14 14:22:01,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 14:22:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 19156 states and 31658 transitions. [2022-12-14 14:22:01,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 14:22:01,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:22:01,262 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:22:01,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:22:01,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 14:22:01,464 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:22:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:22:01,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2090036788, now seen corresponding path program 1 times [2022-12-14 14:22:01,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:22:01,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921059754] [2022-12-14 14:22:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:22:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 14:22:02,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:22:02,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921059754] [2022-12-14 14:22:02,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921059754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:22:02,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698196315] [2022-12-14 14:22:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:02,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:02,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:22:02,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:22:02,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:22:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:22:02,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:22:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:22:02,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:22:02,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698196315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:22:02,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:22:02,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:22:02,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987881339] [2022-12-14 14:22:02,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:22:02,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:22:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:22:02,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:22:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:22:02,502 INFO L87 Difference]: Start difference. First operand 19156 states and 31658 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 14:22:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:22:03,250 INFO L93 Difference]: Finished difference Result 40284 states and 68092 transitions. [2022-12-14 14:22:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:22:03,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 133 [2022-12-14 14:22:03,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:22:03,319 INFO L225 Difference]: With dead ends: 40284 [2022-12-14 14:22:03,319 INFO L226 Difference]: Without dead ends: 21145 [2022-12-14 14:22:03,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:22:03,369 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 211 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:22:03,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1221 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:22:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21145 states. [2022-12-14 14:22:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21145 to 21145. [2022-12-14 14:22:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21145 states, 16398 states have (on average 1.6280643980973288) internal successors, (26697), 17286 states have internal predecessors, (26697), 3463 states have call successors, (3463), 1065 states have call predecessors, (3463), 1283 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-12-14 14:22:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21145 states to 21145 states and 35381 transitions. [2022-12-14 14:22:04,137 INFO L78 Accepts]: Start accepts. Automaton has 21145 states and 35381 transitions. Word has length 133 [2022-12-14 14:22:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:22:04,138 INFO L495 AbstractCegarLoop]: Abstraction has 21145 states and 35381 transitions. [2022-12-14 14:22:04,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 14:22:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 21145 states and 35381 transitions. [2022-12-14 14:22:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 14:22:04,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:22:04,141 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:22:04,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 14:22:04,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 14:22:04,342 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:22:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:22:04,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1895547908, now seen corresponding path program 1 times [2022-12-14 14:22:04,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:22:04,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423415768] [2022-12-14 14:22:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:04,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:22:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 14:22:05,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:22:05,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423415768] [2022-12-14 14:22:05,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423415768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:22:05,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636150579] [2022-12-14 14:22:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:05,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:05,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:22:05,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:22:05,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:22:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:05,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:22:05,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:22:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:22:05,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:22:05,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636150579] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:22:05,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:22:05,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:22:05,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832095565] [2022-12-14 14:22:05,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:22:05,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:22:05,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:22:05,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:22:05,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:22:05,363 INFO L87 Difference]: Start difference. First operand 21145 states and 35381 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 14:22:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:22:06,570 INFO L93 Difference]: Finished difference Result 44262 states and 75487 transitions. [2022-12-14 14:22:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:22:06,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 137 [2022-12-14 14:22:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:22:06,655 INFO L225 Difference]: With dead ends: 44262 [2022-12-14 14:22:06,655 INFO L226 Difference]: Without dead ends: 23134 [2022-12-14 14:22:06,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:22:06,716 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 209 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:22:06,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1221 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:22:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2022-12-14 14:22:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 23134. [2022-12-14 14:22:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23134 states, 18336 states have (on average 1.6590314136125655) internal successors, (30420), 19224 states have internal predecessors, (30420), 3463 states have call successors, (3463), 1116 states have call predecessors, (3463), 1334 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-12-14 14:22:07,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23134 states to 23134 states and 39104 transitions. [2022-12-14 14:22:07,718 INFO L78 Accepts]: Start accepts. Automaton has 23134 states and 39104 transitions. Word has length 137 [2022-12-14 14:22:07,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:22:07,718 INFO L495 AbstractCegarLoop]: Abstraction has 23134 states and 39104 transitions. [2022-12-14 14:22:07,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 14:22:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 23134 states and 39104 transitions. [2022-12-14 14:22:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 14:22:07,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:22:07,721 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:22:07,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:22:07,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:07,922 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:22:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:22:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash 587299136, now seen corresponding path program 1 times [2022-12-14 14:22:07,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:22:07,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650129218] [2022-12-14 14:22:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:07,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:22:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 14:22:08,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:22:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650129218] [2022-12-14 14:22:08,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650129218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:22:08,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065055296] [2022-12-14 14:22:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:08,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:08,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:22:08,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:22:08,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:22:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:08,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:22:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:22:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 14:22:08,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:22:08,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065055296] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:22:08,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:22:08,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:22:08,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007640193] [2022-12-14 14:22:08,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:22:08,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:22:08,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:22:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:22:08,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:22:08,767 INFO L87 Difference]: Start difference. First operand 23134 states and 39104 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 14:22:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:22:09,598 INFO L93 Difference]: Finished difference Result 48240 states and 82882 transitions. [2022-12-14 14:22:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:22:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 140 [2022-12-14 14:22:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:22:09,677 INFO L225 Difference]: With dead ends: 48240 [2022-12-14 14:22:09,677 INFO L226 Difference]: Without dead ends: 25123 [2022-12-14 14:22:09,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:22:09,726 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 207 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:22:09,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1221 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:22:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25123 states. [2022-12-14 14:22:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25123 to 25123. [2022-12-14 14:22:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25123 states, 20274 states have (on average 1.6840781296241492) internal successors, (34143), 21162 states have internal predecessors, (34143), 3463 states have call successors, (3463), 1167 states have call predecessors, (3463), 1385 states have return successors, (5221), 3134 states have call predecessors, (5221), 3458 states have call successors, (5221) [2022-12-14 14:22:10,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25123 states to 25123 states and 42827 transitions. [2022-12-14 14:22:10,562 INFO L78 Accepts]: Start accepts. Automaton has 25123 states and 42827 transitions. Word has length 140 [2022-12-14 14:22:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:22:10,562 INFO L495 AbstractCegarLoop]: Abstraction has 25123 states and 42827 transitions. [2022-12-14 14:22:10,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 14:22:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 25123 states and 42827 transitions. [2022-12-14 14:22:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 14:22:10,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:22:10,566 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 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] [2022-12-14 14:22:10,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:22:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 14:22:10,768 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:22:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:22:10,769 INFO L85 PathProgramCache]: Analyzing trace with hash 325309778, now seen corresponding path program 1 times [2022-12-14 14:22:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:22:10,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233668240] [2022-12-14 14:22:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:10,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:22:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 14:22:11,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:22:11,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233668240] [2022-12-14 14:22:11,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233668240] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:22:11,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545568912] [2022-12-14 14:22:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:11,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:11,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:22:11,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:22:11,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:22:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:22:11,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:22:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 14:22:11,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:22:11,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545568912] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:22:11,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:22:11,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:22:11,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870104041] [2022-12-14 14:22:11,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:22:11,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:22:11,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:22:11,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:22:11,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:22:11,641 INFO L87 Difference]: Start difference. First operand 25123 states and 42827 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 14:22:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:22:12,444 INFO L93 Difference]: Finished difference Result 51840 states and 89203 transitions. [2022-12-14 14:22:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:22:12,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 142 [2022-12-14 14:22:12,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:22:12,513 INFO L225 Difference]: With dead ends: 51840 [2022-12-14 14:22:12,514 INFO L226 Difference]: Without dead ends: 26779 [2022-12-14 14:22:12,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:22:12,550 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 286 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:22:12,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1327 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:22:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26779 states. [2022-12-14 14:22:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26779 to 26625. [2022-12-14 14:22:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26625 states, 21348 states have (on average 1.669289863219037) internal successors, (35636), 22239 states have internal predecessors, (35636), 3752 states have call successors, (3752), 1320 states have call predecessors, (3752), 1524 states have return successors, (6648), 3389 states have call predecessors, (6648), 3747 states have call successors, (6648) [2022-12-14 14:22:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26625 states to 26625 states and 46036 transitions. [2022-12-14 14:22:13,426 INFO L78 Accepts]: Start accepts. Automaton has 26625 states and 46036 transitions. Word has length 142 [2022-12-14 14:22:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:22:13,426 INFO L495 AbstractCegarLoop]: Abstraction has 26625 states and 46036 transitions. [2022-12-14 14:22:13,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-12-14 14:22:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 26625 states and 46036 transitions. [2022-12-14 14:22:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 14:22:13,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:22:13,430 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:22:13,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:22:13,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 14:22:13,632 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:22:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:22:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1477122230, now seen corresponding path program 1 times [2022-12-14 14:22:13,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:22:13,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452880063] [2022-12-14 14:22:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:13,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:22:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 14:22:14,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:22:14,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452880063] [2022-12-14 14:22:14,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452880063] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:22:14,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958536062] [2022-12-14 14:22:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:14,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:14,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:22:14,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:22:14,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:22:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 14:22:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:22:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 14:22:14,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:22:14,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958536062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:22:14,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:22:14,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2022-12-14 14:22:14,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080055818] [2022-12-14 14:22:14,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:22:14,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:22:14,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:22:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:22:14,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:22:14,419 INFO L87 Difference]: Start difference. First operand 26625 states and 46036 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-12-14 14:22:15,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:22:15,197 INFO L93 Difference]: Finished difference Result 27958 states and 50408 transitions. [2022-12-14 14:22:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:22:15,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) Word has length 145 [2022-12-14 14:22:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:22:15,297 INFO L225 Difference]: With dead ends: 27958 [2022-12-14 14:22:15,297 INFO L226 Difference]: Without dead ends: 27872 [2022-12-14 14:22:15,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:22:15,315 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 44 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:22:15,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1500 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:22:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27872 states. [2022-12-14 14:22:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27872 to 26785. [2022-12-14 14:22:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26785 states, 21508 states have (on average 1.6643109540636043) internal successors, (35796), 22399 states have internal predecessors, (35796), 3752 states have call successors, (3752), 1320 states have call predecessors, (3752), 1524 states have return successors, (6648), 3389 states have call predecessors, (6648), 3747 states have call successors, (6648) [2022-12-14 14:22:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26785 states to 26785 states and 46196 transitions. [2022-12-14 14:22:16,267 INFO L78 Accepts]: Start accepts. Automaton has 26785 states and 46196 transitions. Word has length 145 [2022-12-14 14:22:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:22:16,267 INFO L495 AbstractCegarLoop]: Abstraction has 26785 states and 46196 transitions. [2022-12-14 14:22:16,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 2 states have call predecessors, (21), 1 states have call successors, (21) [2022-12-14 14:22:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 26785 states and 46196 transitions. [2022-12-14 14:22:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 14:22:16,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:22:16,275 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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] [2022-12-14 14:22:16,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:22:16,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:16,477 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:22:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:22:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1856453154, now seen corresponding path program 1 times [2022-12-14 14:22:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:22:16,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528466552] [2022-12-14 14:22:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:16,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:22:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 14:22:17,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:22:17,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528466552] [2022-12-14 14:22:17,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528466552] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:22:17,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795047522] [2022-12-14 14:22:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:22:17,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:22:17,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:22:17,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:22:17,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f650ccc3-a7fe-40ef-adfb-d6de423931fc/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:22:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:22:17,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 14:22:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:22:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 14:22:18,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:22:19,902 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 14:22:25,987 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 14:22:26,085 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 14:24:55,190 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-12-14 14:24:55,574 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 14:25:02,311 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.