./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:24:19,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:24:19,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:24:19,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:24:19,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:24:19,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:24:19,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:24:19,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:24:19,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:24:19,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:24:19,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:24:19,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:24:19,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:24:19,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:24:19,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:24:19,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:24:19,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:24:19,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:24:19,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:24:19,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:24:19,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:24:19,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:24:19,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:24:19,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:24:19,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:24:19,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:24:19,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:24:19,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:24:19,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:24:19,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:24:19,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:24:19,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:24:19,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:24:19,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:24:19,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:24:19,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:24:19,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:24:19,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:24:19,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:24:19,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:24:19,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:24:19,527 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:24:19,548 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:24:19,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:24:19,549 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:24:19,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:24:19,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:24:19,550 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:24:19,550 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:24:19,550 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:24:19,550 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:24:19,550 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:24:19,551 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:24:19,551 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:24:19,551 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:24:19,551 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:24:19,551 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:24:19,551 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:24:19,552 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:24:19,552 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:24:19,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:24:19,553 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:24:19,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:24:19,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:24:19,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:24:19,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:24:19,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:24:19,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:24:19,554 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:24:19,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:24:19,554 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:24:19,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:24:19,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:24:19,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:24:19,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:24:19,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:24:19,555 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:24:19,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:24:19,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:24:19,555 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:24:19,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:24:19,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:24:19,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:24:19,556 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_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f [2022-12-14 06:24:19,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:24:19,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:24:19,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:24:19,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:24:19,773 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:24:19,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2022-12-14 06:24:22,313 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:24:22,576 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:24:22,576 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2022-12-14 06:24:22,593 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/data/510681609/5af62df04aaf47838cd580b5544f2cc5/FLAG9a994d548 [2022-12-14 06:24:22,883 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/data/510681609/5af62df04aaf47838cd580b5544f2cc5 [2022-12-14 06:24:22,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:24:22,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:24:22,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:24:22,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:24:22,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:24:22,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:24:22" (1/1) ... [2022-12-14 06:24:22,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622ad110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:22, skipping insertion in model container [2022-12-14 06:24:22,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:24:22" (1/1) ... [2022-12-14 06:24:22,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:24:22,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:24:23,231 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_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2022-12-14 06:24:23,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:24:23,249 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:24:23,316 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_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2022-12-14 06:24:23,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:24:23,337 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:24:23,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23 WrapperNode [2022-12-14 06:24:23,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:24:23,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:24:23,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:24:23,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:24:23,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,390 INFO L138 Inliner]: procedures = 95, calls = 339, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1122 [2022-12-14 06:24:23,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:24:23,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:24:23,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:24:23,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:24:23,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,449 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:24:23,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:24:23,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:24:23,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:24:23,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (1/1) ... [2022-12-14 06:24:23,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:24:23,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:23,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:24:23,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:24:23,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:24:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 06:24:23,527 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 06:24:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 06:24:23,527 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 06:24:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 06:24:23,527 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 06:24:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-12-14 06:24:23,527 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-12-14 06:24:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 06:24:23,527 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 06:24:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 06:24:23,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 06:24:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 06:24:23,528 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 06:24:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 06:24:23,528 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 06:24:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 06:24:23,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 06:24:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 06:24:23,528 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 06:24:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 06:24:23,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 06:24:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 06:24:23,529 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 06:24:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 06:24:23,529 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 06:24:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 06:24:23,529 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 06:24:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 06:24:23,529 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-12-14 06:24:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 06:24:23,529 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 06:24:23,529 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 06:24:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 06:24:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 06:24:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 06:24:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 06:24:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 06:24:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-12-14 06:24:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-12-14 06:24:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:24:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 06:24:23,530 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 06:24:23,530 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 06:24:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 06:24:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 06:24:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 06:24:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:24:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:24:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 06:24:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 06:24:23,670 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:24:23,672 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:24:24,400 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:24:24,848 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:24:24,848 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:24:24,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:24:24 BoogieIcfgContainer [2022-12-14 06:24:24,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:24:24,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:24:24,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:24:24,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:24:24,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:24:22" (1/3) ... [2022-12-14 06:24:24,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190abfc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:24:24, skipping insertion in model container [2022-12-14 06:24:24,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:24:23" (2/3) ... [2022-12-14 06:24:24,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190abfc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:24:24, skipping insertion in model container [2022-12-14 06:24:24,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:24:24" (3/3) ... [2022-12-14 06:24:24,860 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product27.cil.c [2022-12-14 06:24:24,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:24:24,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:24:24,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:24:24,937 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;@1bf96dc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:24:24,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:24:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 365 states, 246 states have (on average 1.5934959349593496) internal successors, (392), 267 states have internal predecessors, (392), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-12-14 06:24:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 06:24:24,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:24,955 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:24,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1685455319, now seen corresponding path program 1 times [2022-12-14 06:24:24,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:24,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504277643] [2022-12-14 06:24:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:24,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:24:25,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:25,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504277643] [2022-12-14 06:24:25,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504277643] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:25,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:25,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:24:25,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583491944] [2022-12-14 06:24:25,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:25,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:24:25,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:25,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:24:25,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:24:25,245 INFO L87 Difference]: Start difference. First operand has 365 states, 246 states have (on average 1.5934959349593496) internal successors, (392), 267 states have internal predecessors, (392), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 06:24:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:25,372 INFO L93 Difference]: Finished difference Result 383 states and 605 transitions. [2022-12-14 06:24:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:24:25,375 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 77 [2022-12-14 06:24:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:25,385 INFO L225 Difference]: With dead ends: 383 [2022-12-14 06:24:25,385 INFO L226 Difference]: Without dead ends: 361 [2022-12-14 06:24:25,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:24:25,390 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:25,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 533 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-12-14 06:24:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2022-12-14 06:24:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 244 states have (on average 1.5819672131147542) internal successors, (386), 263 states have internal predecessors, (386), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2022-12-14 06:24:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 567 transitions. [2022-12-14 06:24:25,441 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 567 transitions. Word has length 77 [2022-12-14 06:24:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:25,442 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 567 transitions. [2022-12-14 06:24:25,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-12-14 06:24:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 567 transitions. [2022-12-14 06:24:25,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 06:24:25,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:25,446 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:25,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:24:25,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1228107108, now seen corresponding path program 1 times [2022-12-14 06:24:25,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:25,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822160243] [2022-12-14 06:24:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:25,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:24:25,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:25,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822160243] [2022-12-14 06:24:25,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822160243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:25,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:25,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:24:25,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923566858] [2022-12-14 06:24:25,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:25,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:24:25,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:25,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:24:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:24:25,774 INFO L87 Difference]: Start difference. First operand 361 states and 567 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 06:24:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:27,345 INFO L93 Difference]: Finished difference Result 1092 states and 1742 transitions. [2022-12-14 06:24:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:24:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2022-12-14 06:24:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:27,350 INFO L225 Difference]: With dead ends: 1092 [2022-12-14 06:24:27,350 INFO L226 Difference]: Without dead ends: 747 [2022-12-14 06:24:27,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:24:27,353 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1110 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 2835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:27,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 1370 Invalid, 2835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [412 Valid, 2423 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 06:24:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-12-14 06:24:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 709. [2022-12-14 06:24:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 488 states have (on average 1.5942622950819672) internal successors, (778), 521 states have internal predecessors, (778), 176 states have call successors, (176), 44 states have call predecessors, (176), 44 states have return successors, (177), 168 states have call predecessors, (177), 171 states have call successors, (177) [2022-12-14 06:24:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1131 transitions. [2022-12-14 06:24:27,394 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1131 transitions. Word has length 78 [2022-12-14 06:24:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:27,395 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 1131 transitions. [2022-12-14 06:24:27,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 06:24:27,395 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1131 transitions. [2022-12-14 06:24:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 06:24:27,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:27,397 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:27,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:24:27,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:27,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:27,398 INFO L85 PathProgramCache]: Analyzing trace with hash -677758014, now seen corresponding path program 1 times [2022-12-14 06:24:27,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:27,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935959187] [2022-12-14 06:24:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:27,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:24:27,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:27,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935959187] [2022-12-14 06:24:27,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935959187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:27,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:27,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:24:27,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237904305] [2022-12-14 06:24:27,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:27,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:24:27,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:27,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:24:27,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:24:27,590 INFO L87 Difference]: Start difference. First operand 709 states and 1131 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 06:24:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:27,950 INFO L93 Difference]: Finished difference Result 780 states and 1243 transitions. [2022-12-14 06:24:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:24:27,951 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-12-14 06:24:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:27,958 INFO L225 Difference]: With dead ends: 780 [2022-12-14 06:24:27,958 INFO L226 Difference]: Without dead ends: 765 [2022-12-14 06:24:27,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:24:27,960 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 660 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:27,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 1403 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:24:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-12-14 06:24:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 713. [2022-12-14 06:24:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 492 states have (on average 1.589430894308943) internal successors, (782), 525 states have internal predecessors, (782), 176 states have call successors, (176), 44 states have call predecessors, (176), 44 states have return successors, (177), 168 states have call predecessors, (177), 171 states have call successors, (177) [2022-12-14 06:24:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1135 transitions. [2022-12-14 06:24:28,018 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1135 transitions. Word has length 82 [2022-12-14 06:24:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:28,019 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 1135 transitions. [2022-12-14 06:24:28,019 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 06:24:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1135 transitions. [2022-12-14 06:24:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 06:24:28,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:28,022 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:28,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:24:28,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:28,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:28,023 INFO L85 PathProgramCache]: Analyzing trace with hash 343391352, now seen corresponding path program 1 times [2022-12-14 06:24:28,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:28,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246033493] [2022-12-14 06:24:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:28,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:24:28,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:28,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246033493] [2022-12-14 06:24:28,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246033493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:28,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:28,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:24:28,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740048582] [2022-12-14 06:24:28,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:28,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:24:28,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:28,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:24:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:24:28,295 INFO L87 Difference]: Start difference. First operand 713 states and 1135 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-12-14 06:24:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:28,443 INFO L93 Difference]: Finished difference Result 732 states and 1159 transitions. [2022-12-14 06:24:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:24:28,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 87 [2022-12-14 06:24:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:28,449 INFO L225 Difference]: With dead ends: 732 [2022-12-14 06:24:28,449 INFO L226 Difference]: Without dead ends: 717 [2022-12-14 06:24:28,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:24:28,451 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 41 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:28,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2610 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-12-14 06:24:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 713. [2022-12-14 06:24:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 492 states have (on average 1.5853658536585367) internal successors, (780), 525 states have internal predecessors, (780), 176 states have call successors, (176), 44 states have call predecessors, (176), 44 states have return successors, (177), 168 states have call predecessors, (177), 171 states have call successors, (177) [2022-12-14 06:24:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1133 transitions. [2022-12-14 06:24:28,512 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1133 transitions. Word has length 87 [2022-12-14 06:24:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:28,513 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 1133 transitions. [2022-12-14 06:24:28,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-12-14 06:24:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1133 transitions. [2022-12-14 06:24:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 06:24:28,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:28,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:28,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:24:28,518 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:28,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1540778606, now seen corresponding path program 1 times [2022-12-14 06:24:28,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:28,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956463976] [2022-12-14 06:24:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:24:28,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:28,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956463976] [2022-12-14 06:24:28,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956463976] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:28,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:28,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:24:28,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660513373] [2022-12-14 06:24:28,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:28,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:28,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:28,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:28,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:28,656 INFO L87 Difference]: Start difference. First operand 713 states and 1133 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:28,819 INFO L93 Difference]: Finished difference Result 2073 states and 3329 transitions. [2022-12-14 06:24:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:28,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-12-14 06:24:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:28,825 INFO L225 Difference]: With dead ends: 2073 [2022-12-14 06:24:28,825 INFO L226 Difference]: Without dead ends: 1376 [2022-12-14 06:24:28,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:28,829 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 522 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:28,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1154 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2022-12-14 06:24:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1348. [2022-12-14 06:24:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 950 states have (on average 1.5989473684210527) internal successors, (1519), 1012 states have internal predecessors, (1519), 316 states have call successors, (316), 79 states have call predecessors, (316), 81 states have return successors, (330), 294 states have call predecessors, (330), 311 states have call successors, (330) [2022-12-14 06:24:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2165 transitions. [2022-12-14 06:24:28,895 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2165 transitions. Word has length 94 [2022-12-14 06:24:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:28,896 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 2165 transitions. [2022-12-14 06:24:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2165 transitions. [2022-12-14 06:24:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 06:24:28,898 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:28,898 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:28,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:24:28,898 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash 519365610, now seen corresponding path program 1 times [2022-12-14 06:24:28,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:28,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199002159] [2022-12-14 06:24:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:28,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:24:28,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:28,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199002159] [2022-12-14 06:24:28,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199002159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:28,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:28,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:24:28,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173811789] [2022-12-14 06:24:28,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:28,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:28,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:28,964 INFO L87 Difference]: Start difference. First operand 1348 states and 2165 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:29,183 INFO L93 Difference]: Finished difference Result 3977 states and 6448 transitions. [2022-12-14 06:24:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2022-12-14 06:24:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:29,196 INFO L225 Difference]: With dead ends: 3977 [2022-12-14 06:24:29,196 INFO L226 Difference]: Without dead ends: 2648 [2022-12-14 06:24:29,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:29,202 INFO L413 NwaCegarLoop]: 648 mSDtfsCounter, 521 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:29,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1160 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2022-12-14 06:24:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2619. [2022-12-14 06:24:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 1867 states have (on average 1.604713444027852) internal successors, (2996), 1987 states have internal predecessors, (2996), 596 states have call successors, (596), 149 states have call predecessors, (596), 155 states have return successors, (652), 546 states have call predecessors, (652), 591 states have call successors, (652) [2022-12-14 06:24:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 4244 transitions. [2022-12-14 06:24:29,319 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 4244 transitions. Word has length 95 [2022-12-14 06:24:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:29,320 INFO L495 AbstractCegarLoop]: Abstraction has 2619 states and 4244 transitions. [2022-12-14 06:24:29,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 4244 transitions. [2022-12-14 06:24:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 06:24:29,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:29,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:29,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:24:29,322 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:29,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1079662288, now seen corresponding path program 1 times [2022-12-14 06:24:29,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:29,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111907665] [2022-12-14 06:24:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:29,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:24:29,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:29,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111907665] [2022-12-14 06:24:29,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111907665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:29,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:29,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:24:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701235586] [2022-12-14 06:24:29,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:29,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:29,390 INFO L87 Difference]: Start difference. First operand 2619 states and 4244 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:29,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:29,686 INFO L93 Difference]: Finished difference Result 7786 states and 12764 transitions. [2022-12-14 06:24:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:29,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2022-12-14 06:24:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:29,730 INFO L225 Difference]: With dead ends: 7786 [2022-12-14 06:24:29,730 INFO L226 Difference]: Without dead ends: 5192 [2022-12-14 06:24:29,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:29,740 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 520 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:29,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1166 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:29,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5192 states. [2022-12-14 06:24:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5192 to 5162. [2022-12-14 06:24:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 3702 states have (on average 1.606158833063209) internal successors, (5946), 3938 states have internal predecessors, (5946), 1156 states have call successors, (1156), 289 states have call predecessors, (1156), 303 states have return successors, (1356), 1050 states have call predecessors, (1356), 1151 states have call successors, (1356) [2022-12-14 06:24:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 8458 transitions. [2022-12-14 06:24:29,995 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 8458 transitions. Word has length 96 [2022-12-14 06:24:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:29,995 INFO L495 AbstractCegarLoop]: Abstraction has 5162 states and 8458 transitions. [2022-12-14 06:24:29,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 8458 transitions. [2022-12-14 06:24:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 06:24:29,997 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:29,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:29,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:24:29,998 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash 890084332, now seen corresponding path program 1 times [2022-12-14 06:24:29,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:29,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320626338] [2022-12-14 06:24:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:29,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:24:30,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:30,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320626338] [2022-12-14 06:24:30,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320626338] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:30,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:30,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:24:30,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597088294] [2022-12-14 06:24:30,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:30,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:30,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:30,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:30,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:30,068 INFO L87 Difference]: Start difference. First operand 5162 states and 8458 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:30,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:30,628 INFO L93 Difference]: Finished difference Result 15405 states and 25693 transitions. [2022-12-14 06:24:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:30,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-12-14 06:24:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:30,681 INFO L225 Difference]: With dead ends: 15405 [2022-12-14 06:24:30,681 INFO L226 Difference]: Without dead ends: 10280 [2022-12-14 06:24:30,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:30,701 INFO L413 NwaCegarLoop]: 654 mSDtfsCounter, 519 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:30,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1172 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10280 states. [2022-12-14 06:24:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10280 to 10249. [2022-12-14 06:24:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10249 states, 7373 states have (on average 1.605316696053167) internal successors, (11836), 7841 states have internal predecessors, (11836), 2276 states have call successors, (2276), 569 states have call predecessors, (2276), 599 states have return successors, (2992), 2058 states have call predecessors, (2992), 2271 states have call successors, (2992) [2022-12-14 06:24:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10249 states to 10249 states and 17104 transitions. [2022-12-14 06:24:31,325 INFO L78 Accepts]: Start accepts. Automaton has 10249 states and 17104 transitions. Word has length 97 [2022-12-14 06:24:31,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:31,326 INFO L495 AbstractCegarLoop]: Abstraction has 10249 states and 17104 transitions. [2022-12-14 06:24:31,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 10249 states and 17104 transitions. [2022-12-14 06:24:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 06:24:31,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:31,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:31,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:24:31,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1822691314, now seen corresponding path program 1 times [2022-12-14 06:24:31,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:31,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795643950] [2022-12-14 06:24:31,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:31,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:24:31,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:31,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795643950] [2022-12-14 06:24:31,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795643950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:31,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:31,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:24:31,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103717644] [2022-12-14 06:24:31,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:31,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:31,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:31,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:31,394 INFO L87 Difference]: Start difference. First operand 10249 states and 17104 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:31,793 INFO L93 Difference]: Finished difference Result 10917 states and 18261 transitions. [2022-12-14 06:24:31,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:31,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2022-12-14 06:24:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:31,839 INFO L225 Difference]: With dead ends: 10917 [2022-12-14 06:24:31,839 INFO L226 Difference]: Without dead ends: 10906 [2022-12-14 06:24:31,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:31,844 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 505 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:31,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1170 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10906 states. [2022-12-14 06:24:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10906 to 10876. [2022-12-14 06:24:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10876 states, 7824 states have (on average 1.6046779141104295) internal successors, (12555), 8321 states have internal predecessors, (12555), 2416 states have call successors, (2416), 604 states have call predecessors, (2416), 635 states have return successors, (3234), 2183 states have call predecessors, (3234), 2411 states have call successors, (3234) [2022-12-14 06:24:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10876 states to 10876 states and 18205 transitions. [2022-12-14 06:24:32,436 INFO L78 Accepts]: Start accepts. Automaton has 10876 states and 18205 transitions. Word has length 98 [2022-12-14 06:24:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:32,437 INFO L495 AbstractCegarLoop]: Abstraction has 10876 states and 18205 transitions. [2022-12-14 06:24:32,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-14 06:24:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 10876 states and 18205 transitions. [2022-12-14 06:24:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 06:24:32,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:32,442 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:32,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:24:32,443 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:32,443 INFO L85 PathProgramCache]: Analyzing trace with hash 403012698, now seen corresponding path program 1 times [2022-12-14 06:24:32,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:32,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168897104] [2022-12-14 06:24:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:32,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 06:24:32,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168897104] [2022-12-14 06:24:32,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168897104] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:32,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:32,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:24:32,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113280588] [2022-12-14 06:24:32,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:32,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:24:32,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:32,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:24:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:24:32,599 INFO L87 Difference]: Start difference. First operand 10876 states and 18205 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 06:24:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:33,058 INFO L93 Difference]: Finished difference Result 23129 states and 39584 transitions. [2022-12-14 06:24:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:24:33,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 147 [2022-12-14 06:24:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:33,136 INFO L225 Difference]: With dead ends: 23129 [2022-12-14 06:24:33,136 INFO L226 Difference]: Without dead ends: 12270 [2022-12-14 06:24:33,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:24:33,184 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 97 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:33,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1601 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12270 states. [2022-12-14 06:24:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12270 to 11232. [2022-12-14 06:24:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 8132 states have (on average 1.5975159862272503) internal successors, (12991), 8629 states have internal predecessors, (12991), 2448 states have call successors, (2448), 604 states have call predecessors, (2448), 651 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2022-12-14 06:24:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 18786 transitions. [2022-12-14 06:24:33,760 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 18786 transitions. Word has length 147 [2022-12-14 06:24:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:33,760 INFO L495 AbstractCegarLoop]: Abstraction has 11232 states and 18786 transitions. [2022-12-14 06:24:33,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-14 06:24:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 18786 transitions. [2022-12-14 06:24:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 06:24:33,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:33,764 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:33,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:24:33,764 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1266705204, now seen corresponding path program 1 times [2022-12-14 06:24:33,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:33,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688992291] [2022-12-14 06:24:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:33,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 06:24:33,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688992291] [2022-12-14 06:24:33,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688992291] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192859901] [2022-12-14 06:24:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:33,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:33,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:33,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:24:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:34,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 1872 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:24:34,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 06:24:34,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:24:34,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192859901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:34,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:24:34,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 06:24:34,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456677795] [2022-12-14 06:24:34,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:34,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:24:34,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:24:34,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:24:34,312 INFO L87 Difference]: Start difference. First operand 11232 states and 18786 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:24:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:35,045 INFO L93 Difference]: Finished difference Result 23773 states and 40784 transitions. [2022-12-14 06:24:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:24:35,046 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 150 [2022-12-14 06:24:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:35,100 INFO L225 Difference]: With dead ends: 23773 [2022-12-14 06:24:35,100 INFO L226 Difference]: Without dead ends: 12558 [2022-12-14 06:24:35,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:24:35,141 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 213 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:35,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1365 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:24:35,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12558 states. [2022-12-14 06:24:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12558 to 12558. [2022-12-14 06:24:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12558 states, 9424 states have (on average 1.6418718166383701) internal successors, (15473), 9921 states have internal predecessors, (15473), 2448 states have call successors, (2448), 638 states have call predecessors, (2448), 685 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2022-12-14 06:24:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12558 states to 12558 states and 21268 transitions. [2022-12-14 06:24:35,792 INFO L78 Accepts]: Start accepts. Automaton has 12558 states and 21268 transitions. Word has length 150 [2022-12-14 06:24:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:35,793 INFO L495 AbstractCegarLoop]: Abstraction has 12558 states and 21268 transitions. [2022-12-14 06:24:35,793 INFO L496 AbstractCegarLoop]: INTERPOLANT 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, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:24:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 12558 states and 21268 transitions. [2022-12-14 06:24:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 06:24:35,798 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:35,798 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:35,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:24:35,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 06:24:35,999 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:35,999 INFO L85 PathProgramCache]: Analyzing trace with hash 489114329, now seen corresponding path program 1 times [2022-12-14 06:24:35,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:35,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605642917] [2022-12-14 06:24:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:36,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 06:24:36,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:36,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605642917] [2022-12-14 06:24:36,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605642917] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423662768] [2022-12-14 06:24:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:36,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:36,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:36,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:36,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:24:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:36,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1877 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:24:36,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 06:24:36,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:24:36,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423662768] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:36,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:24:36,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 06:24:36,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270798248] [2022-12-14 06:24:36,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:36,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:24:36,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:36,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:24:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:24:36,454 INFO L87 Difference]: Start difference. First operand 12558 states and 21268 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:24:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:36,995 INFO L93 Difference]: Finished difference Result 26425 states and 45714 transitions. [2022-12-14 06:24:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:24:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 155 [2022-12-14 06:24:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:37,028 INFO L225 Difference]: With dead ends: 26425 [2022-12-14 06:24:37,028 INFO L226 Difference]: Without dead ends: 13884 [2022-12-14 06:24:37,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:24:37,051 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 211 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:37,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1365 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13884 states. [2022-12-14 06:24:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13884 to 13884. [2022-12-14 06:24:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13884 states, 10716 states have (on average 1.675531914893617) internal successors, (17955), 11213 states have internal predecessors, (17955), 2448 states have call successors, (2448), 672 states have call predecessors, (2448), 719 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2022-12-14 06:24:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13884 states to 13884 states and 23750 transitions. [2022-12-14 06:24:37,466 INFO L78 Accepts]: Start accepts. Automaton has 13884 states and 23750 transitions. Word has length 155 [2022-12-14 06:24:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:37,467 INFO L495 AbstractCegarLoop]: Abstraction has 13884 states and 23750 transitions. [2022-12-14 06:24:37,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:24:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 13884 states and 23750 transitions. [2022-12-14 06:24:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 06:24:37,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:37,471 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:37,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:24:37,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 06:24:37,672 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:37,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1693968881, now seen corresponding path program 1 times [2022-12-14 06:24:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:37,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206241671] [2022-12-14 06:24:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 06:24:38,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:38,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206241671] [2022-12-14 06:24:38,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206241671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:38,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540766345] [2022-12-14 06:24:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:38,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:38,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:38,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:38,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:24:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:38,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1881 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:24:38,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 06:24:38,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:24:38,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540766345] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:38,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:24:38,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 06:24:38,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450721284] [2022-12-14 06:24:38,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:38,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:24:38,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:38,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:24:38,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:24:38,977 INFO L87 Difference]: Start difference. First operand 13884 states and 23750 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:24:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:39,522 INFO L93 Difference]: Finished difference Result 29077 states and 50644 transitions. [2022-12-14 06:24:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:24:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 159 [2022-12-14 06:24:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:39,570 INFO L225 Difference]: With dead ends: 29077 [2022-12-14 06:24:39,570 INFO L226 Difference]: Without dead ends: 15210 [2022-12-14 06:24:39,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:24:39,603 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 209 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:39,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1365 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:24:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15210 states. [2022-12-14 06:24:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15210 to 15210. [2022-12-14 06:24:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15210 states, 12008 states have (on average 1.7019487008660892) internal successors, (20437), 12505 states have internal predecessors, (20437), 2448 states have call successors, (2448), 706 states have call predecessors, (2448), 753 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2022-12-14 06:24:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15210 states to 15210 states and 26232 transitions. [2022-12-14 06:24:40,276 INFO L78 Accepts]: Start accepts. Automaton has 15210 states and 26232 transitions. Word has length 159 [2022-12-14 06:24:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:40,277 INFO L495 AbstractCegarLoop]: Abstraction has 15210 states and 26232 transitions. [2022-12-14 06:24:40,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:24:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 15210 states and 26232 transitions. [2022-12-14 06:24:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-14 06:24:40,282 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:40,282 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:40,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:24:40,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:40,484 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash 758601414, now seen corresponding path program 1 times [2022-12-14 06:24:40,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:40,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536316454] [2022-12-14 06:24:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:40,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 06:24:41,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:41,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536316454] [2022-12-14 06:24:41,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536316454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:41,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609580945] [2022-12-14 06:24:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:41,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:41,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:41,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:41,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:24:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:41,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:24:41,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:24:41,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:24:41,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609580945] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:41,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:24:41,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 06:24:41,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818632409] [2022-12-14 06:24:41,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:41,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:24:41,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:24:41,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:24:41,829 INFO L87 Difference]: Start difference. First operand 15210 states and 26232 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:24:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:42,300 INFO L93 Difference]: Finished difference Result 31729 states and 55574 transitions. [2022-12-14 06:24:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:24:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 162 [2022-12-14 06:24:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:42,346 INFO L225 Difference]: With dead ends: 31729 [2022-12-14 06:24:42,347 INFO L226 Difference]: Without dead ends: 16536 [2022-12-14 06:24:42,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:24:42,378 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 207 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:42,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1365 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16536 states. [2022-12-14 06:24:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16536 to 16536. [2022-12-14 06:24:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16536 states, 13300 states have (on average 1.723233082706767) internal successors, (22919), 13797 states have internal predecessors, (22919), 2448 states have call successors, (2448), 740 states have call predecessors, (2448), 787 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2022-12-14 06:24:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16536 states to 16536 states and 28714 transitions. [2022-12-14 06:24:42,851 INFO L78 Accepts]: Start accepts. Automaton has 16536 states and 28714 transitions. Word has length 162 [2022-12-14 06:24:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:42,852 INFO L495 AbstractCegarLoop]: Abstraction has 16536 states and 28714 transitions. [2022-12-14 06:24:42,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-14 06:24:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand 16536 states and 28714 transitions. [2022-12-14 06:24:42,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 06:24:42,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:42,857 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:42,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:24:43,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 06:24:43,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:43,060 INFO L85 PathProgramCache]: Analyzing trace with hash 880135352, now seen corresponding path program 1 times [2022-12-14 06:24:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:43,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508514527] [2022-12-14 06:24:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 06:24:43,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:43,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508514527] [2022-12-14 06:24:43,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508514527] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:43,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343904178] [2022-12-14 06:24:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:43,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:43,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:43,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:43,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:24:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:24:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 06:24:44,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:24:44,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343904178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:44,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:24:44,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 06:24:44,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007851949] [2022-12-14 06:24:44,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:44,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:24:44,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:44,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:24:44,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:24:44,318 INFO L87 Difference]: Start difference. First operand 16536 states and 28714 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-12-14 06:24:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:44,784 INFO L93 Difference]: Finished difference Result 34240 states and 59491 transitions. [2022-12-14 06:24:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:24:44,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 164 [2022-12-14 06:24:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:44,837 INFO L225 Difference]: With dead ends: 34240 [2022-12-14 06:24:44,837 INFO L226 Difference]: Without dead ends: 17766 [2022-12-14 06:24:44,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:24:44,868 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 311 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:44,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1483 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17766 states. [2022-12-14 06:24:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17766 to 17578. [2022-12-14 06:24:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17578 states, 13946 states have (on average 1.7022085185716334) internal successors, (23739), 14462 states have internal predecessors, (23739), 2688 states have call successors, (2688), 910 states have call predecessors, (2688), 943 states have return successors, (4076), 2421 states have call predecessors, (4076), 2683 states have call successors, (4076) [2022-12-14 06:24:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17578 states to 17578 states and 30503 transitions. [2022-12-14 06:24:45,397 INFO L78 Accepts]: Start accepts. Automaton has 17578 states and 30503 transitions. Word has length 164 [2022-12-14 06:24:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:45,398 INFO L495 AbstractCegarLoop]: Abstraction has 17578 states and 30503 transitions. [2022-12-14 06:24:45,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-12-14 06:24:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 17578 states and 30503 transitions. [2022-12-14 06:24:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 06:24:45,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:45,401 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:45,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:24:45,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:24:45,602 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash 886520037, now seen corresponding path program 1 times [2022-12-14 06:24:45,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:45,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311138026] [2022-12-14 06:24:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:45,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 06:24:46,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:46,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311138026] [2022-12-14 06:24:46,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311138026] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:46,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615156429] [2022-12-14 06:24:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:46,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:46,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:46,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:46,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:24:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:46,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:24:46,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-12-14 06:24:46,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:24:46,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615156429] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:46,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:24:46,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [21] total 23 [2022-12-14 06:24:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38986209] [2022-12-14 06:24:46,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:46,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:24:46,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:46,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:24:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:24:46,660 INFO L87 Difference]: Start difference. First operand 17578 states and 30503 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-12-14 06:24:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:47,217 INFO L93 Difference]: Finished difference Result 18605 states and 33303 transitions. [2022-12-14 06:24:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:24:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 167 [2022-12-14 06:24:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:47,268 INFO L225 Difference]: With dead ends: 18605 [2022-12-14 06:24:47,269 INFO L226 Difference]: Without dead ends: 18519 [2022-12-14 06:24:47,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:24:47,275 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 44 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:47,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1644 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18519 states. [2022-12-14 06:24:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18519 to 17674. [2022-12-14 06:24:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17674 states, 14042 states have (on average 1.69740777666999) internal successors, (23835), 14558 states have internal predecessors, (23835), 2688 states have call successors, (2688), 910 states have call predecessors, (2688), 943 states have return successors, (4076), 2421 states have call predecessors, (4076), 2683 states have call successors, (4076) [2022-12-14 06:24:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17674 states to 17674 states and 30599 transitions. [2022-12-14 06:24:47,827 INFO L78 Accepts]: Start accepts. Automaton has 17674 states and 30599 transitions. Word has length 167 [2022-12-14 06:24:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:47,827 INFO L495 AbstractCegarLoop]: Abstraction has 17674 states and 30599 transitions. [2022-12-14 06:24:47,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-12-14 06:24:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 17674 states and 30599 transitions. [2022-12-14 06:24:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-12-14 06:24:47,833 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:47,833 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:24:47,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:24:48,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:24:48,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash -128258994, now seen corresponding path program 1 times [2022-12-14 06:24:48,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:48,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593365754] [2022-12-14 06:24:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:48,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-12-14 06:24:49,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:49,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593365754] [2022-12-14 06:24:49,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593365754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:49,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6181799] [2022-12-14 06:24:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:49,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:49,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:49,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:49,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9e98e9-cb5f-4ef2-962b-ee7a669c5294/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:24:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:49,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1950 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 06:24:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 06:24:49,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:24:51,870 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 06:24:58,172 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-12-14 06:24:58,279 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-12-14 06:27:34,183 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-12-14 06:27:34,579 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-12-14 06:27:40,415 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.