./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:31:06,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:31:06,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:31:06,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:31:06,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:31:06,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:31:06,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:31:06,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:31:06,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:31:06,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:31:06,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:31:06,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:31:06,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:31:06,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:31:06,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:31:06,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:31:06,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:31:06,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:31:06,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:31:06,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:31:06,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:31:06,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:31:06,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:31:06,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:31:06,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:31:06,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:31:06,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:31:06,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:31:06,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:31:06,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:31:06,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:31:06,437 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:31:06,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:31:06,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:31:06,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:31:06,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:31:06,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:31:06,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:31:06,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:31:06,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:31:06,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:31:06,445 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:31:06,467 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:31:06,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:31:06,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:31:06,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:31:06,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:31:06,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:31:06,469 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:31:06,469 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:31:06,469 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:31:06,469 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:31:06,469 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:31:06,470 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:31:06,470 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:31:06,470 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:31:06,470 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:31:06,470 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:31:06,470 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:31:06,471 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:31:06,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:31:06,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:31:06,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:31:06,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:31:06,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:31:06,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:31:06,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:31:06,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:31:06,474 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:31:06,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:31:06,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:31:06,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:31:06,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:31:06,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:31:06,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:31:06,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:31:06,475 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:31:06,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:31:06,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:31:06,476 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:31:06,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:31:06,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:31:06,476 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:31:06,477 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_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68493680033c9035e39b01d00eb3730662e9195bee3c7e3d4b2805e2b52b60ec [2022-11-22 00:31:06,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:31:06,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:31:06,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:31:06,813 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:31:06,814 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:31:06,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2022-11-22 00:31:09,845 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:31:10,239 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:31:10,241 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c [2022-11-22 00:31:10,260 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/data/2bf07a24f/c3b04067f07d438487367b756dad3bda/FLAGf063fb76d [2022-11-22 00:31:10,274 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/data/2bf07a24f/c3b04067f07d438487367b756dad3bda [2022-11-22 00:31:10,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:31:10,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:31:10,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:31:10,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:31:10,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:31:10,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:31:10" (1/1) ... [2022-11-22 00:31:10,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a35f6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:10, skipping insertion in model container [2022-11-22 00:31:10,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:31:10" (1/1) ... [2022-11-22 00:31:10,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:31:10,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:31:11,018 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_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2022-11-22 00:31:11,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:31:11,070 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:31:11,192 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_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/sv-benchmarks/c/product-lines/elevator_spec2_product25.cil.c[66231,66244] [2022-11-22 00:31:11,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:31:11,230 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:31:11,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11 WrapperNode [2022-11-22 00:31:11,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:31:11,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:31:11,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:31:11,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:31:11,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,330 INFO L138 Inliner]: procedures = 91, calls = 334, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 846 [2022-11-22 00:31:11,331 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:31:11,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:31:11,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:31:11,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:31:11,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,423 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:31:11,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:31:11,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:31:11,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:31:11,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (1/1) ... [2022-11-22 00:31:11,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:31:11,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:11,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:31:11,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:31:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:31:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 00:31:11,536 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 00:31:11,536 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-22 00:31:11,537 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-22 00:31:11,537 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 00:31:11,537 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 00:31:11,537 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 00:31:11,537 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 00:31:11,537 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 00:31:11,537 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 00:31:11,538 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 00:31:11,538 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 00:31:11,538 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 00:31:11,538 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 00:31:11,538 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-22 00:31:11,538 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-22 00:31:11,538 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 00:31:11,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 00:31:11,539 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 00:31:11,539 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 00:31:11,539 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 00:31:11,540 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 00:31:11,540 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 00:31:11,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 00:31:11,541 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 00:31:11,541 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 00:31:11,542 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 00:31:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 00:31:11,542 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 00:31:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 00:31:11,542 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 00:31:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 00:31:11,542 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 00:31:11,543 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 00:31:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:31:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 00:31:11,543 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 00:31:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 00:31:11,543 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 00:31:11,543 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 00:31:11,544 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 00:31:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:31:11,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:31:11,544 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 00:31:11,544 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 00:31:11,753 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:31:11,755 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:31:13,006 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:31:13,836 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:31:13,837 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 00:31:13,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:31:13 BoogieIcfgContainer [2022-11-22 00:31:13,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:31:13,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:31:13,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:31:13,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:31:13,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:31:10" (1/3) ... [2022-11-22 00:31:13,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff2d534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:31:13, skipping insertion in model container [2022-11-22 00:31:13,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:31:11" (2/3) ... [2022-11-22 00:31:13,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff2d534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:31:13, skipping insertion in model container [2022-11-22 00:31:13,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:31:13" (3/3) ... [2022-11-22 00:31:13,854 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product25.cil.c [2022-11-22 00:31:13,877 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:31:13,877 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:31:13,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:31:13,955 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;@2c893a47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:31:13,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:31:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) [2022-11-22 00:31:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 00:31:13,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:13,996 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] [2022-11-22 00:31:13,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:14,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1959347446, now seen corresponding path program 1 times [2022-11-22 00:31:14,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:14,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819452764] [2022-11-22 00:31:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:14,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:14,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:14,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819452764] [2022-11-22 00:31:14,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819452764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:14,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:14,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:31:14,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891166898] [2022-11-22 00:31:14,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:14,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 00:31:14,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 00:31:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 00:31:14,568 INFO L87 Difference]: Start difference. First operand has 347 states, 236 states have (on average 1.6228813559322033) internal successors, (383), 257 states have internal predecessors, (383), 88 states have call successors, (88), 21 states have call predecessors, (88), 21 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 00:31:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:14,784 INFO L93 Difference]: Finished difference Result 365 states and 586 transitions. [2022-11-22 00:31:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 00:31:14,790 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 51 [2022-11-22 00:31:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:14,810 INFO L225 Difference]: With dead ends: 365 [2022-11-22 00:31:14,810 INFO L226 Difference]: Without dead ends: 343 [2022-11-22 00:31:14,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 00:31:14,818 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:14,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 517 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-22 00:31:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2022-11-22 00:31:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 234 states have (on average 1.6111111111111112) internal successors, (377), 253 states have internal predecessors, (377), 88 states have call successors, (88), 21 states have call predecessors, (88), 20 states have return successors, (83), 81 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-22 00:31:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 548 transitions. [2022-11-22 00:31:14,913 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 548 transitions. Word has length 51 [2022-11-22 00:31:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:14,914 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 548 transitions. [2022-11-22 00:31:14,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 00:31:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 548 transitions. [2022-11-22 00:31:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 00:31:14,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:14,920 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] [2022-11-22 00:31:14,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:31:14,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:14,921 INFO L85 PathProgramCache]: Analyzing trace with hash -349694760, now seen corresponding path program 1 times [2022-11-22 00:31:14,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:14,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622501507] [2022-11-22 00:31:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:14,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:15,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:15,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622501507] [2022-11-22 00:31:15,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622501507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:15,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:15,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:31:15,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665851882] [2022-11-22 00:31:15,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:15,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:31:15,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:15,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:31:15,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:31:15,449 INFO L87 Difference]: Start difference. First operand 343 states and 548 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:31:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:18,323 INFO L93 Difference]: Finished difference Result 1160 states and 1889 transitions. [2022-11-22 00:31:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 00:31:18,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-22 00:31:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:18,345 INFO L225 Difference]: With dead ends: 1160 [2022-11-22 00:31:18,345 INFO L226 Difference]: Without dead ends: 833 [2022-11-22 00:31:18,350 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 [2022-11-22 00:31:18,351 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1625 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:18,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1688 Valid, 1657 Invalid, 2978 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [502 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-22 00:31:18,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-11-22 00:31:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 784. [2022-11-22 00:31:18,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 555 states have (on average 1.6396396396396395) internal successors, (910), 590 states have internal predecessors, (910), 185 states have call successors, (185), 41 states have call predecessors, (185), 43 states have return successors, (186), 177 states have call predecessors, (186), 180 states have call successors, (186) [2022-11-22 00:31:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1281 transitions. [2022-11-22 00:31:18,498 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1281 transitions. Word has length 52 [2022-11-22 00:31:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:18,498 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1281 transitions. [2022-11-22 00:31:18,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 00:31:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1281 transitions. [2022-11-22 00:31:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-22 00:31:18,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:18,507 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] [2022-11-22 00:31:18,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:31:18,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1533630219, now seen corresponding path program 1 times [2022-11-22 00:31:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:18,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928960463] [2022-11-22 00:31:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:18,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:18,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:18,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928960463] [2022-11-22 00:31:18,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928960463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:18,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:18,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:31:18,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124502253] [2022-11-22 00:31:18,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:18,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:31:18,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:31:18,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:18,822 INFO L87 Difference]: Start difference. First operand 784 states and 1281 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-22 00:31:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:19,065 INFO L93 Difference]: Finished difference Result 1320 states and 2163 transitions. [2022-11-22 00:31:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:19,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-11-22 00:31:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:19,078 INFO L225 Difference]: With dead ends: 1320 [2022-11-22 00:31:19,078 INFO L226 Difference]: Without dead ends: 854 [2022-11-22 00:31:19,088 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 [2022-11-22 00:31:19,092 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 41 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:19,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 2157 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-11-22 00:31:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 796. [2022-11-22 00:31:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 564 states have (on average 1.6294326241134751) internal successors, (919), 599 states have internal predecessors, (919), 185 states have call successors, (185), 41 states have call predecessors, (185), 46 states have return successors, (192), 180 states have call predecessors, (192), 180 states have call successors, (192) [2022-11-22 00:31:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1296 transitions. [2022-11-22 00:31:19,174 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1296 transitions. Word has length 56 [2022-11-22 00:31:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:19,176 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 1296 transitions. [2022-11-22 00:31:19,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-22 00:31:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1296 transitions. [2022-11-22 00:31:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 00:31:19,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:19,180 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] [2022-11-22 00:31:19,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:31:19,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:19,191 INFO L85 PathProgramCache]: Analyzing trace with hash 994573149, now seen corresponding path program 1 times [2022-11-22 00:31:19,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:19,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295756689] [2022-11-22 00:31:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:19,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:19,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:19,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295756689] [2022-11-22 00:31:19,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295756689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:19,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:19,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:31:19,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834878917] [2022-11-22 00:31:19,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:19,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:31:19,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:19,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:31:19,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:31:19,595 INFO L87 Difference]: Start difference. First operand 796 states and 1296 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-22 00:31:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:21,972 INFO L93 Difference]: Finished difference Result 1815 states and 2949 transitions. [2022-11-22 00:31:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:31:21,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 60 [2022-11-22 00:31:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:21,982 INFO L225 Difference]: With dead ends: 1815 [2022-11-22 00:31:21,983 INFO L226 Difference]: Without dead ends: 1241 [2022-11-22 00:31:21,986 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 [2022-11-22 00:31:21,997 INFO L413 NwaCegarLoop]: 491 mSDtfsCounter, 1926 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:21,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 1335 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-22 00:31:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2022-11-22 00:31:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1147. [2022-11-22 00:31:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 800 states have (on average 1.58375) internal successors, (1267), 852 states have internal predecessors, (1267), 273 states have call successors, (273), 65 states have call predecessors, (273), 73 states have return successors, (289), 266 states have call predecessors, (289), 268 states have call successors, (289) [2022-11-22 00:31:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1829 transitions. [2022-11-22 00:31:22,123 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1829 transitions. Word has length 60 [2022-11-22 00:31:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:22,124 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1829 transitions. [2022-11-22 00:31:22,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-22 00:31:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1829 transitions. [2022-11-22 00:31:22,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 00:31:22,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:22,135 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] [2022-11-22 00:31:22,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:31:22,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -522031787, now seen corresponding path program 1 times [2022-11-22 00:31:22,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:22,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352776324] [2022-11-22 00:31:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:22,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:22,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352776324] [2022-11-22 00:31:22,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352776324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:22,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:22,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:22,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716113972] [2022-11-22 00:31:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:22,330 INFO L87 Difference]: Start difference. First operand 1147 states and 1829 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 00:31:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:22,601 INFO L93 Difference]: Finished difference Result 2216 states and 3590 transitions. [2022-11-22 00:31:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:31:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 63 [2022-11-22 00:31:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:22,611 INFO L225 Difference]: With dead ends: 2216 [2022-11-22 00:31:22,611 INFO L226 Difference]: Without dead ends: 1147 [2022-11-22 00:31:22,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:22,641 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 210 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:22,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1392 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:31:22,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-22 00:31:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-11-22 00:31:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 800 states have (on average 1.54375) internal successors, (1235), 852 states have internal predecessors, (1235), 273 states have call successors, (273), 65 states have call predecessors, (273), 73 states have return successors, (289), 266 states have call predecessors, (289), 268 states have call successors, (289) [2022-11-22 00:31:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1797 transitions. [2022-11-22 00:31:22,724 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1797 transitions. Word has length 63 [2022-11-22 00:31:22,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:22,725 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1797 transitions. [2022-11-22 00:31:22,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 00:31:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1797 transitions. [2022-11-22 00:31:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 00:31:22,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:22,727 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] [2022-11-22 00:31:22,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:31:22,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1485351252, now seen corresponding path program 1 times [2022-11-22 00:31:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:22,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883425411] [2022-11-22 00:31:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:31:23,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:23,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883425411] [2022-11-22 00:31:23,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883425411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:23,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:23,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:31:23,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961525176] [2022-11-22 00:31:23,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:23,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:31:23,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:23,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:31:23,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:31:23,048 INFO L87 Difference]: Start difference. First operand 1147 states and 1797 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 00:31:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:25,056 INFO L93 Difference]: Finished difference Result 2203 states and 3468 transitions. [2022-11-22 00:31:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:31:25,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2022-11-22 00:31:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:25,068 INFO L225 Difference]: With dead ends: 2203 [2022-11-22 00:31:25,069 INFO L226 Difference]: Without dead ends: 1335 [2022-11-22 00:31:25,073 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 [2022-11-22 00:31:25,074 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 916 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:25,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [986 Valid, 1512 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 00:31:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-11-22 00:31:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1174. [2022-11-22 00:31:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 818 states have (on average 1.5366748166259168) internal successors, (1257), 874 states have internal predecessors, (1257), 274 states have call successors, (274), 70 states have call predecessors, (274), 81 states have return successors, (300), 266 states have call predecessors, (300), 269 states have call successors, (300) [2022-11-22 00:31:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1831 transitions. [2022-11-22 00:31:25,190 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1831 transitions. Word has length 65 [2022-11-22 00:31:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:25,192 INFO L495 AbstractCegarLoop]: Abstraction has 1174 states and 1831 transitions. [2022-11-22 00:31:25,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 00:31:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1831 transitions. [2022-11-22 00:31:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-22 00:31:25,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:25,194 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] [2022-11-22 00:31:25,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:31:25,195 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash -432782446, now seen corresponding path program 1 times [2022-11-22 00:31:25,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:25,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315146584] [2022-11-22 00:31:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:31:25,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:25,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315146584] [2022-11-22 00:31:25,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315146584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:25,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:25,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 00:31:25,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627035295] [2022-11-22 00:31:25,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:25,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:31:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:25,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:31:25,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:31:25,466 INFO L87 Difference]: Start difference. First operand 1174 states and 1831 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-22 00:31:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:26,078 INFO L93 Difference]: Finished difference Result 1246 states and 1944 transitions. [2022-11-22 00:31:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:26,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 69 [2022-11-22 00:31:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:26,109 INFO L225 Difference]: With dead ends: 1246 [2022-11-22 00:31:26,111 INFO L226 Difference]: Without dead ends: 1231 [2022-11-22 00:31:26,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:31:26,117 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 632 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:26,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 1664 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:31:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-11-22 00:31:26,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1178. [2022-11-22 00:31:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 822 states have (on average 1.5340632603406326) internal successors, (1261), 878 states have internal predecessors, (1261), 274 states have call successors, (274), 70 states have call predecessors, (274), 81 states have return successors, (300), 266 states have call predecessors, (300), 269 states have call successors, (300) [2022-11-22 00:31:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1835 transitions. [2022-11-22 00:31:26,254 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1835 transitions. Word has length 69 [2022-11-22 00:31:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:26,256 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1835 transitions. [2022-11-22 00:31:26,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-22 00:31:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1835 transitions. [2022-11-22 00:31:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-22 00:31:26,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:26,259 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] [2022-11-22 00:31:26,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:31:26,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:26,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:26,260 INFO L85 PathProgramCache]: Analyzing trace with hash 182675478, now seen corresponding path program 1 times [2022-11-22 00:31:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:26,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196374302] [2022-11-22 00:31:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 00:31:26,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:26,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196374302] [2022-11-22 00:31:26,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196374302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:26,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:26,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:31:26,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625179363] [2022-11-22 00:31:26,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:26,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:31:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:31:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:31:26,536 INFO L87 Difference]: Start difference. First operand 1178 states and 1835 transitions. Second operand has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 00:31:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:26,849 INFO L93 Difference]: Finished difference Result 1197 states and 1859 transitions. [2022-11-22 00:31:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:31:26,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-11-22 00:31:26,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:26,860 INFO L225 Difference]: With dead ends: 1197 [2022-11-22 00:31:26,860 INFO L226 Difference]: Without dead ends: 1182 [2022-11-22 00:31:26,861 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 [2022-11-22 00:31:26,862 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 257 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:26,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2682 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:31:26,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-11-22 00:31:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1178. [2022-11-22 00:31:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 822 states have (on average 1.5304136253041363) internal successors, (1258), 878 states have internal predecessors, (1258), 274 states have call successors, (274), 70 states have call predecessors, (274), 81 states have return successors, (300), 266 states have call predecessors, (300), 269 states have call successors, (300) [2022-11-22 00:31:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1832 transitions. [2022-11-22 00:31:26,975 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1832 transitions. Word has length 74 [2022-11-22 00:31:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:26,975 INFO L495 AbstractCegarLoop]: Abstraction has 1178 states and 1832 transitions. [2022-11-22 00:31:26,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-22 00:31:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1832 transitions. [2022-11-22 00:31:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-22 00:31:26,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:26,983 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] [2022-11-22 00:31:26,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:31:26,984 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1325457196, now seen corresponding path program 1 times [2022-11-22 00:31:26,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:26,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676807857] [2022-11-22 00:31:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:31:27,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:27,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676807857] [2022-11-22 00:31:27,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676807857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:27,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:27,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:27,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352774408] [2022-11-22 00:31:27,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:27,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:27,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:27,218 INFO L87 Difference]: Start difference. First operand 1178 states and 1832 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 00:31:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:28,747 INFO L93 Difference]: Finished difference Result 3783 states and 5989 transitions. [2022-11-22 00:31:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:28,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2022-11-22 00:31:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:28,768 INFO L225 Difference]: With dead ends: 3783 [2022-11-22 00:31:28,768 INFO L226 Difference]: Without dead ends: 2621 [2022-11-22 00:31:28,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:28,776 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1070 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:28,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 674 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 00:31:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2022-11-22 00:31:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2374. [2022-11-22 00:31:28,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 1688 states have (on average 1.5408767772511849) internal successors, (2601), 1799 states have internal predecessors, (2601), 526 states have call successors, (526), 129 states have call predecessors, (526), 159 states have return successors, (603), 498 states have call predecessors, (603), 521 states have call successors, (603) [2022-11-22 00:31:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3730 transitions. [2022-11-22 00:31:29,009 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3730 transitions. Word has length 84 [2022-11-22 00:31:29,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:29,010 INFO L495 AbstractCegarLoop]: Abstraction has 2374 states and 3730 transitions. [2022-11-22 00:31:29,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 00:31:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3730 transitions. [2022-11-22 00:31:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 00:31:29,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:29,014 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] [2022-11-22 00:31:29,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:31:29,014 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:29,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1407301014, now seen corresponding path program 1 times [2022-11-22 00:31:29,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:29,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909704207] [2022-11-22 00:31:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:31:29,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:29,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909704207] [2022-11-22 00:31:29,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909704207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:29,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:29,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:29,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063035025] [2022-11-22 00:31:29,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:29,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:29,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:29,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:29,296 INFO L87 Difference]: Start difference. First operand 2374 states and 3730 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 00:31:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:31,046 INFO L93 Difference]: Finished difference Result 7279 states and 11631 transitions. [2022-11-22 00:31:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:31,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 82 [2022-11-22 00:31:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:31,096 INFO L225 Difference]: With dead ends: 7279 [2022-11-22 00:31:31,097 INFO L226 Difference]: Without dead ends: 4924 [2022-11-22 00:31:31,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:31,114 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1063 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:31,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1128 Valid, 682 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 00:31:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4924 states. [2022-11-22 00:31:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4924 to 4608. [2022-11-22 00:31:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 3307 states have (on average 1.5439975808890234) internal successors, (5106), 3540 states have internal predecessors, (5106), 979 states have call successors, (979), 247 states have call predecessors, (979), 321 states have return successors, (1205), 911 states have call predecessors, (1205), 974 states have call successors, (1205) [2022-11-22 00:31:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 7290 transitions. [2022-11-22 00:31:31,652 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 7290 transitions. Word has length 82 [2022-11-22 00:31:31,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:31,653 INFO L495 AbstractCegarLoop]: Abstraction has 4608 states and 7290 transitions. [2022-11-22 00:31:31,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 00:31:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 7290 transitions. [2022-11-22 00:31:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 00:31:31,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:31,656 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] [2022-11-22 00:31:31,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 00:31:31,656 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:31,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1854365394, now seen corresponding path program 1 times [2022-11-22 00:31:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:31,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26581343] [2022-11-22 00:31:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:31,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:31:31,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:31,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26581343] [2022-11-22 00:31:31,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26581343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:31,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:31,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:31,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688935223] [2022-11-22 00:31:31,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:31,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:31,872 INFO L87 Difference]: Start difference. First operand 4608 states and 7290 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 00:31:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:34,209 INFO L93 Difference]: Finished difference Result 14041 states and 22771 transitions. [2022-11-22 00:31:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-11-22 00:31:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:34,286 INFO L225 Difference]: With dead ends: 14041 [2022-11-22 00:31:34,286 INFO L226 Difference]: Without dead ends: 9458 [2022-11-22 00:31:34,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:34,314 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1044 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:34,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 691 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 00:31:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9458 states. [2022-11-22 00:31:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9458 to 8990. [2022-11-22 00:31:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8990 states, 6474 states have (on average 1.5410874266295953) internal successors, (9977), 6963 states have internal predecessors, (9977), 1858 states have call successors, (1858), 483 states have call predecessors, (1858), 657 states have return successors, (2544), 1710 states have call predecessors, (2544), 1853 states have call successors, (2544) [2022-11-22 00:31:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8990 states to 8990 states and 14379 transitions. [2022-11-22 00:31:35,276 INFO L78 Accepts]: Start accepts. Automaton has 8990 states and 14379 transitions. Word has length 86 [2022-11-22 00:31:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:35,277 INFO L495 AbstractCegarLoop]: Abstraction has 8990 states and 14379 transitions. [2022-11-22 00:31:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 00:31:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 8990 states and 14379 transitions. [2022-11-22 00:31:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 00:31:35,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:35,281 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] [2022-11-22 00:31:35,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 00:31:35,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:35,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:35,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1651164796, now seen corresponding path program 1 times [2022-11-22 00:31:35,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:35,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850210424] [2022-11-22 00:31:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:35,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:31:35,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:35,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850210424] [2022-11-22 00:31:35,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850210424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:35,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:35,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:35,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187790506] [2022-11-22 00:31:35,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:35,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:35,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:35,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:35,481 INFO L87 Difference]: Start difference. First operand 8990 states and 14379 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 00:31:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:38,380 INFO L93 Difference]: Finished difference Result 27335 states and 45579 transitions. [2022-11-22 00:31:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:38,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2022-11-22 00:31:38,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:38,489 INFO L225 Difference]: With dead ends: 27335 [2022-11-22 00:31:38,490 INFO L226 Difference]: Without dead ends: 18382 [2022-11-22 00:31:38,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:38,538 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 1031 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:38,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1092 Valid, 703 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 00:31:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18382 states. [2022-11-22 00:31:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18382 to 17596. [2022-11-22 00:31:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17596 states, 12677 states have (on average 1.5350635008282716) internal successors, (19460), 13702 states have internal predecessors, (19460), 3565 states have call successors, (3565), 955 states have call predecessors, (3565), 1353 states have return successors, (5735), 3257 states have call predecessors, (5735), 3560 states have call successors, (5735) [2022-11-22 00:31:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17596 states to 17596 states and 28760 transitions. [2022-11-22 00:31:40,205 INFO L78 Accepts]: Start accepts. Automaton has 17596 states and 28760 transitions. Word has length 87 [2022-11-22 00:31:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:40,206 INFO L495 AbstractCegarLoop]: Abstraction has 17596 states and 28760 transitions. [2022-11-22 00:31:40,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-22 00:31:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 17596 states and 28760 transitions. [2022-11-22 00:31:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 00:31:40,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:40,209 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, 1, 1] [2022-11-22 00:31:40,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 00:31:40,209 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2142024568, now seen corresponding path program 1 times [2022-11-22 00:31:40,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:40,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616404094] [2022-11-22 00:31:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:31:40,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:40,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616404094] [2022-11-22 00:31:40,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616404094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:40,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:40,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:31:40,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926544333] [2022-11-22 00:31:40,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:40,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:40,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:40,409 INFO L87 Difference]: Start difference. First operand 17596 states and 28760 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 00:31:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:44,676 INFO L93 Difference]: Finished difference Result 53615 states and 94143 transitions. [2022-11-22 00:31:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:44,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 85 [2022-11-22 00:31:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:44,902 INFO L225 Difference]: With dead ends: 53615 [2022-11-22 00:31:44,902 INFO L226 Difference]: Without dead ends: 36070 [2022-11-22 00:31:44,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:44,982 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 1028 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:44,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 717 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 00:31:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36070 states. [2022-11-22 00:31:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36070 to 34434. [2022-11-22 00:31:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34434 states, 24860 states have (on average 1.5318986323411101) internal successors, (38083), 26912 states have internal predecessors, (38083), 6877 states have call successors, (6877), 1896 states have call predecessors, (6877), 2696 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-11-22 00:31:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34434 states to 34434 states and 58366 transitions. [2022-11-22 00:31:48,881 INFO L78 Accepts]: Start accepts. Automaton has 34434 states and 58366 transitions. Word has length 85 [2022-11-22 00:31:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:48,882 INFO L495 AbstractCegarLoop]: Abstraction has 34434 states and 58366 transitions. [2022-11-22 00:31:48,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-22 00:31:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 34434 states and 58366 transitions. [2022-11-22 00:31:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-22 00:31:48,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:48,890 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, 1, 1, 1] [2022-11-22 00:31:48,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:31:48,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:48,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash 117171356, now seen corresponding path program 1 times [2022-11-22 00:31:48,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:48,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295522361] [2022-11-22 00:31:48,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:48,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-22 00:31:49,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:49,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295522361] [2022-11-22 00:31:49,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295522361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:49,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271177299] [2022-11-22 00:31:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:49,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:49,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:49,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:49,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:31:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:31:49,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 00:31:49,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:31:49,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271177299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:49,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:31:49,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 00:31:49,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061490405] [2022-11-22 00:31:49,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:49,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:49,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:49,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:49,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:31:49,633 INFO L87 Difference]: Start difference. First operand 34434 states and 58366 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2022-11-22 00:31:52,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:52,745 INFO L93 Difference]: Finished difference Result 72595 states and 128120 transitions. [2022-11-22 00:31:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:52,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 131 [2022-11-22 00:31:52,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:53,106 INFO L225 Difference]: With dead ends: 72595 [2022-11-22 00:31:53,106 INFO L226 Difference]: Without dead ends: 38178 [2022-11-22 00:31:53,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:31:53,304 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 213 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:53,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1287 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:31:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38178 states. [2022-11-22 00:31:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38178 to 38178. [2022-11-22 00:31:56,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38178 states, 28508 states have (on average 1.58169636593237) internal successors, (45091), 30560 states have internal predecessors, (45091), 6877 states have call successors, (6877), 1992 states have call predecessors, (6877), 2792 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-11-22 00:31:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38178 states to 38178 states and 65374 transitions. [2022-11-22 00:31:56,640 INFO L78 Accepts]: Start accepts. Automaton has 38178 states and 65374 transitions. Word has length 131 [2022-11-22 00:31:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:56,641 INFO L495 AbstractCegarLoop]: Abstraction has 38178 states and 65374 transitions. [2022-11-22 00:31:56,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2022-11-22 00:31:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 38178 states and 65374 transitions. [2022-11-22 00:31:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-22 00:31:56,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:56,651 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, 1, 1, 1] [2022-11-22 00:31:56,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:31:56,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:31:56,870 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:31:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1718077385, now seen corresponding path program 1 times [2022-11-22 00:31:56,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:56,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220491541] [2022-11-22 00:31:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-22 00:31:57,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:57,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220491541] [2022-11-22 00:31:57,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220491541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:31:57,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853741168] [2022-11-22 00:31:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:57,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:31:57,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:31:57,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:31:57,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:31:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:57,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1813 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:31:57,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:31:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 00:31:57,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:31:57,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853741168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:57,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:31:57,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 00:31:57,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975520261] [2022-11-22 00:31:57,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:57,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:57,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:57,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:57,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:31:57,550 INFO L87 Difference]: Start difference. First operand 38178 states and 65374 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2022-11-22 00:32:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:00,989 INFO L93 Difference]: Finished difference Result 80083 states and 142037 transitions. [2022-11-22 00:32:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:32:00,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 136 [2022-11-22 00:32:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:01,295 INFO L225 Difference]: With dead ends: 80083 [2022-11-22 00:32:01,295 INFO L226 Difference]: Without dead ends: 41922 [2022-11-22 00:32:01,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:32:01,432 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 211 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:01,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1287 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:32:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41922 states. [2022-11-22 00:32:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41922 to 41922. [2022-11-22 00:32:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41922 states, 32156 states have (on average 1.6201952979226273) internal successors, (52099), 34208 states have internal predecessors, (52099), 6877 states have call successors, (6877), 2088 states have call predecessors, (6877), 2888 states have return successors, (13406), 6248 states have call predecessors, (13406), 6872 states have call successors, (13406) [2022-11-22 00:32:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41922 states to 41922 states and 72382 transitions. [2022-11-22 00:32:04,680 INFO L78 Accepts]: Start accepts. Automaton has 41922 states and 72382 transitions. Word has length 136 [2022-11-22 00:32:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:04,681 INFO L495 AbstractCegarLoop]: Abstraction has 41922 states and 72382 transitions. [2022-11-22 00:32:04,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2022-11-22 00:32:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 41922 states and 72382 transitions. [2022-11-22 00:32:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-22 00:32:04,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:04,690 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, 1, 1, 1] [2022-11-22 00:32:04,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:32:04,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:04,899 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:04,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1250562935, now seen corresponding path program 1 times [2022-11-22 00:32:04,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:04,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502872061] [2022-11-22 00:32:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:04,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-22 00:32:05,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:05,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502872061] [2022-11-22 00:32:05,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502872061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:05,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005874264] [2022-11-22 00:32:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:05,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:05,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:05,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:05,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9b5baf8-43e3-415d-863d-c4ad5a2d6736/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:32:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:05,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:32:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-22 00:32:05,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:05,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005874264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:05,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:32:05,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-22 00:32:05,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676149539] [2022-11-22 00:32:05,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:05,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:32:05,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:05,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:32:05,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:32:05,569 INFO L87 Difference]: Start difference. First operand 41922 states and 72382 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2022-11-22 00:32:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:08,743 INFO L93 Difference]: Finished difference Result 87571 states and 155954 transitions. [2022-11-22 00:32:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:32:08,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 [2022-11-22 00:32:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:08,964 INFO L225 Difference]: With dead ends: 87571 [2022-11-22 00:32:08,964 INFO L226 Difference]: Without dead ends: 45666 [2022-11-22 00:32:09,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:32:09,137 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 209 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:09,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1287 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:32:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45666 states.