./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:09:35,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:09:35,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:09:35,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:09:35,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:09:35,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:09:35,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:09:35,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:09:35,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:09:35,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:09:35,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:09:35,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:09:35,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:09:35,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:09:35,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:09:35,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:09:35,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:09:35,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:09:35,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:09:35,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:09:35,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:09:35,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:09:35,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:09:35,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:09:35,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:09:35,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:09:35,472 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:09:35,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:09:35,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:09:35,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:09:35,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:09:35,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:09:35,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:09:35,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:09:35,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:09:35,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:09:35,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:09:35,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:09:35,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:09:35,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:09:35,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:09:35,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:09:35,543 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:09:35,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:09:35,544 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:09:35,544 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:09:35,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:09:35,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:09:35,546 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:09:35,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:09:35,547 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:09:35,547 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:09:35,549 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:09:35,549 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:09:35,549 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:09:35,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:09:35,550 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:09:35,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:09:35,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:09:35,551 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:09:35,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:09:35,552 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:09:35,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:09:35,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:09:35,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:09:35,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:09:35,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:09:35,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:09:35,554 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:09:35,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:09:35,555 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:09:35,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:09:35,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:09:35,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:09:35,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:09:35,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:09:35,557 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:09:35,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:09:35,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:09:35,557 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:09:35,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:09:35,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:09:35,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:09:35,558 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_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eb5ae4a2b95fd78cf87e688565203c0839d6de752e442a1cce7638954224909 [2022-11-22 01:09:35,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:09:35,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:09:35,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:09:35,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:09:35,974 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:09:35,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2022-11-22 01:09:39,567 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:09:40,066 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:09:40,067 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c [2022-11-22 01:09:40,103 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/data/1263e12a1/fad78eb040c74d68a5e105a3b89b524e/FLAG161f05f85 [2022-11-22 01:09:40,126 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/data/1263e12a1/fad78eb040c74d68a5e105a3b89b524e [2022-11-22 01:09:40,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:09:40,133 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:09:40,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:09:40,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:09:40,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:09:40,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:09:40" (1/1) ... [2022-11-22 01:09:40,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb7e36c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:40, skipping insertion in model container [2022-11-22 01:09:40,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:09:40" (1/1) ... [2022-11-22 01:09:40,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:09:40,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:09:40,910 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_8116a452-4230-4f16-a1bb-6b9b4e5b93db/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2022-11-22 01:09:40,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:09:40,971 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:09:41,087 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_8116a452-4230-4f16-a1bb-6b9b4e5b93db/sv-benchmarks/c/product-lines/elevator_spec3_product19.cil.c[55726,55739] [2022-11-22 01:09:41,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:09:41,143 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:09:41,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41 WrapperNode [2022-11-22 01:09:41,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:09:41,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:09:41,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:09:41,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:09:41,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,300 INFO L138 Inliner]: procedures = 92, calls = 346, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1091 [2022-11-22 01:09:41,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:09:41,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:09:41,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:09:41,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:09:41,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,431 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:09:41,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:09:41,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:09:41,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:09:41,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (1/1) ... [2022-11-22 01:09:41,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:09:41,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:41,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:09:41,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:09:41,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:09:41,619 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-22 01:09:41,619 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-22 01:09:41,620 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 01:09:41,620 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 01:09:41,620 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-22 01:09:41,620 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2022-11-22 01:09:41,621 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 01:09:41,621 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 01:09:41,621 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-22 01:09:41,621 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-22 01:09:41,621 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 01:09:41,622 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 01:09:41,622 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-22 01:09:41,622 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-22 01:09:41,622 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 01:09:41,623 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 01:09:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 01:09:41,623 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 01:09:41,623 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 01:09:41,624 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 01:09:41,624 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 01:09:41,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 01:09:41,625 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 01:09:41,625 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 01:09:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 01:09:41,627 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 01:09:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 01:09:41,627 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 01:09:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-22 01:09:41,628 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-22 01:09:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-11-22 01:09:41,628 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-11-22 01:09:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 01:09:41,628 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 01:09:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-11-22 01:09:41,629 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-11-22 01:09:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 01:09:41,629 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 01:09:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 01:09:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 01:09:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 01:09:41,631 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 01:09:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 01:09:41,631 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 01:09:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:09:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 01:09:41,633 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 01:09:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 01:09:41,634 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 01:09:41,635 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 01:09:41,635 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 01:09:41,635 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 01:09:41,636 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 01:09:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:09:41,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:09:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 01:09:41,637 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 01:09:41,937 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:09:41,940 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:09:43,572 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:09:44,532 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:09:44,532 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:09:44,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:09:44 BoogieIcfgContainer [2022-11-22 01:09:44,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:09:44,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:09:44,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:09:44,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:09:44,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:09:40" (1/3) ... [2022-11-22 01:09:44,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e86b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:09:44, skipping insertion in model container [2022-11-22 01:09:44,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:41" (2/3) ... [2022-11-22 01:09:44,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e86b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:09:44, skipping insertion in model container [2022-11-22 01:09:44,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:09:44" (3/3) ... [2022-11-22 01:09:44,548 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product19.cil.c [2022-11-22 01:09:44,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:09:44,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:09:44,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:09:44,652 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;@58b53ee9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:09:44,653 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:09:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-22 01:09:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:09:44,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:44,684 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:09:44,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1894499934, now seen corresponding path program 1 times [2022-11-22 01:09:44,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:44,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695881242] [2022-11-22 01:09:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:44,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 01:09:45,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:45,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695881242] [2022-11-22 01:09:45,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695881242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:45,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572238828] [2022-11-22 01:09:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:45,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:45,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:45,888 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:45,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:09:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:09:46,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:09:46,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:46,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572238828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:46,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:46,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 01:09:46,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933773826] [2022-11-22 01:09:46,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:46,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:09:46,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:09:46,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:46,750 INFO L87 Difference]: Start difference. First operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 01:09:47,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:47,189 INFO L93 Difference]: Finished difference Result 1153 states and 1836 transitions. [2022-11-22 01:09:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:09:47,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-11-22 01:09:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:47,213 INFO L225 Difference]: With dead ends: 1153 [2022-11-22 01:09:47,213 INFO L226 Difference]: Without dead ends: 745 [2022-11-22 01:09:47,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:47,226 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 513 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:47,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1296 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-22 01:09:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 733. [2022-11-22 01:09:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 493 states have (on average 1.5598377281947262) internal successors, (769), 524 states have internal predecessors, (769), 191 states have call successors, (191), 49 states have call predecessors, (191), 48 states have return successors, (193), 185 states have call predecessors, (193), 188 states have call successors, (193) [2022-11-22 01:09:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1153 transitions. [2022-11-22 01:09:47,362 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1153 transitions. Word has length 88 [2022-11-22 01:09:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:47,363 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1153 transitions. [2022-11-22 01:09:47,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 01:09:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1153 transitions. [2022-11-22 01:09:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 01:09:47,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:47,372 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:09:47,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:47,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 01:09:47,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:47,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1403473205, now seen corresponding path program 1 times [2022-11-22 01:09:47,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:47,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926918728] [2022-11-22 01:09:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 01:09:48,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:48,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926918728] [2022-11-22 01:09:48,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926918728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:48,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620803465] [2022-11-22 01:09:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:48,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:48,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:48,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:48,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:09:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:48,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:09:48,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:09:48,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:48,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620803465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:48,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:48,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 01:09:48,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619961239] [2022-11-22 01:09:48,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:48,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:09:48,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:09:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:48,673 INFO L87 Difference]: Start difference. First operand 733 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:09:48,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:48,981 INFO L93 Difference]: Finished difference Result 1795 states and 2854 transitions. [2022-11-22 01:09:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:09:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-11-22 01:09:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:48,992 INFO L225 Difference]: With dead ends: 1795 [2022-11-22 01:09:48,992 INFO L226 Difference]: Without dead ends: 1074 [2022-11-22 01:09:48,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:48,999 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 568 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:49,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1185 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-11-22 01:09:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2022-11-22 01:09:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 710 states have (on average 1.5676056338028168) internal successors, (1113), 756 states have internal predecessors, (1113), 271 states have call successors, (271), 68 states have call predecessors, (271), 68 states have return successors, (278), 264 states have call predecessors, (278), 268 states have call successors, (278) [2022-11-22 01:09:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1662 transitions. [2022-11-22 01:09:49,091 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1662 transitions. Word has length 87 [2022-11-22 01:09:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:49,092 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1662 transitions. [2022-11-22 01:09:49,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:09:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1662 transitions. [2022-11-22 01:09:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:09:49,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:49,099 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:09:49,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 01:09:49,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:49,309 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:49,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1601677810, now seen corresponding path program 1 times [2022-11-22 01:09:49,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:49,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274916750] [2022-11-22 01:09:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:49,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:09:49,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:49,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274916750] [2022-11-22 01:09:49,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274916750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:49,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:49,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:09:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075315503] [2022-11-22 01:09:49,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:49,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:09:49,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:09:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:09:49,865 INFO L87 Difference]: Start difference. First operand 1050 states and 1662 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 01:09:51,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:51,486 INFO L93 Difference]: Finished difference Result 3541 states and 5778 transitions. [2022-11-22 01:09:51,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:09:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2022-11-22 01:09:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:51,519 INFO L225 Difference]: With dead ends: 3541 [2022-11-22 01:09:51,519 INFO L226 Difference]: Without dead ends: 2503 [2022-11-22 01:09:51,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:09:51,537 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 828 mSDsluCounter, 3270 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 4246 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:51,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 4246 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 01:09:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-11-22 01:09:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1960. [2022-11-22 01:09:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1352 states have (on average 1.5754437869822486) internal successors, (2130), 1440 states have internal predecessors, (2130), 482 states have call successors, (482), 124 states have call predecessors, (482), 125 states have return successors, (529), 455 states have call predecessors, (529), 478 states have call successors, (529) [2022-11-22 01:09:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 3141 transitions. [2022-11-22 01:09:51,810 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 3141 transitions. Word has length 88 [2022-11-22 01:09:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:51,810 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 3141 transitions. [2022-11-22 01:09:51,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-22 01:09:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 3141 transitions. [2022-11-22 01:09:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-22 01:09:51,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:51,820 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:09:51,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:09:51,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:51,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1173323453, now seen corresponding path program 1 times [2022-11-22 01:09:51,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:51,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145788477] [2022-11-22 01:09:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:51,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 01:09:52,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:52,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145788477] [2022-11-22 01:09:52,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145788477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:52,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642033765] [2022-11-22 01:09:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:52,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:52,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:52,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:52,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:09:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:52,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:09:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:52,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 01:09:52,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:52,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642033765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:52,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:52,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-22 01:09:52,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651255676] [2022-11-22 01:09:52,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:52,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:09:52,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:52,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:09:52,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:09:52,837 INFO L87 Difference]: Start difference. First operand 1960 states and 3141 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 01:09:54,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:54,352 INFO L93 Difference]: Finished difference Result 5763 states and 9465 transitions. [2022-11-22 01:09:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:09:54,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2022-11-22 01:09:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:54,392 INFO L225 Difference]: With dead ends: 5763 [2022-11-22 01:09:54,392 INFO L226 Difference]: Without dead ends: 3815 [2022-11-22 01:09:54,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:09:54,425 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 646 mSDsluCounter, 2298 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:54,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 3008 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:09:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3815 states. [2022-11-22 01:09:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3815 to 3785. [2022-11-22 01:09:54,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 2528 states have (on average 1.5051424050632911) internal successors, (3805), 2750 states have internal predecessors, (3805), 1029 states have call successors, (1029), 224 states have call predecessors, (1029), 227 states have return successors, (1219), 946 states have call predecessors, (1219), 1023 states have call successors, (1219) [2022-11-22 01:09:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 6053 transitions. [2022-11-22 01:09:54,846 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 6053 transitions. Word has length 89 [2022-11-22 01:09:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:54,846 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 6053 transitions. [2022-11-22 01:09:54,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 01:09:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 6053 transitions. [2022-11-22 01:09:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-22 01:09:54,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:54,850 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:09:54,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:55,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:55,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash -331275658, now seen corresponding path program 1 times [2022-11-22 01:09:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:55,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700064859] [2022-11-22 01:09:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 01:09:55,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:55,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700064859] [2022-11-22 01:09:55,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700064859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:55,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486656992] [2022-11-22 01:09:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:55,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:55,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:55,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:55,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:09:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:56,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1586 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:09:56,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:09:56,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:56,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486656992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:56,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:56,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-22 01:09:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255679967] [2022-11-22 01:09:56,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:56,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:09:56,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:09:56,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:56,165 INFO L87 Difference]: Start difference. First operand 3785 states and 6053 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:09:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:56,862 INFO L93 Difference]: Finished difference Result 8289 states and 13335 transitions. [2022-11-22 01:09:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:09:56,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2022-11-22 01:09:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:56,905 INFO L225 Difference]: With dead ends: 8289 [2022-11-22 01:09:56,905 INFO L226 Difference]: Without dead ends: 4516 [2022-11-22 01:09:56,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:56,943 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 566 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:56,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 1290 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4516 states. [2022-11-22 01:09:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4516 to 3722. [2022-11-22 01:09:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 2485 states have (on average 1.5038229376257546) internal successors, (3737), 2706 states have internal predecessors, (3737), 1017 states have call successors, (1017), 220 states have call predecessors, (1017), 219 states have return successors, (1166), 931 states have call predecessors, (1166), 1011 states have call successors, (1166) [2022-11-22 01:09:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 5920 transitions. [2022-11-22 01:09:57,314 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 5920 transitions. Word has length 88 [2022-11-22 01:09:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:57,315 INFO L495 AbstractCegarLoop]: Abstraction has 3722 states and 5920 transitions. [2022-11-22 01:09:57,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-22 01:09:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 5920 transitions. [2022-11-22 01:09:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 01:09:57,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:57,323 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:09:57,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:57,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:57,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:57,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:57,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1123085548, now seen corresponding path program 1 times [2022-11-22 01:09:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:57,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647330109] [2022-11-22 01:09:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:57,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:09:58,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:58,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647330109] [2022-11-22 01:09:58,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647330109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:58,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617182874] [2022-11-22 01:09:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:58,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:58,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:58,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:09:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:58,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:09:58,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:09:59,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:59,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617182874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:59,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:59,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 15 [2022-11-22 01:09:59,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10001680] [2022-11-22 01:09:59,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:59,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:09:59,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:09:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:09:59,228 INFO L87 Difference]: Start difference. First operand 3722 states and 5920 transitions. Second operand has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:10:02,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:02,999 INFO L93 Difference]: Finished difference Result 9218 states and 14985 transitions. [2022-11-22 01:10:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:10:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 94 [2022-11-22 01:10:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:03,066 INFO L225 Difference]: With dead ends: 9218 [2022-11-22 01:10:03,067 INFO L226 Difference]: Without dead ends: 5508 [2022-11-22 01:10:03,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:10:03,115 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1619 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:03,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 2476 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-22 01:10:03,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2022-11-22 01:10:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 4062. [2022-11-22 01:10:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 2741 states have (on average 1.4866836920831814) internal successors, (4075), 2970 states have internal predecessors, (4075), 1077 states have call successors, (1077), 248 states have call predecessors, (1077), 243 states have return successors, (1228), 979 states have call predecessors, (1228), 1071 states have call successors, (1228) [2022-11-22 01:10:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 6380 transitions. [2022-11-22 01:10:03,684 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 6380 transitions. Word has length 94 [2022-11-22 01:10:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:03,685 INFO L495 AbstractCegarLoop]: Abstraction has 4062 states and 6380 transitions. [2022-11-22 01:10:03,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-22 01:10:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 6380 transitions. [2022-11-22 01:10:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 01:10:03,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:03,689 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:10:03,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:03,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:03,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:03,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1329423846, now seen corresponding path program 1 times [2022-11-22 01:10:03,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:03,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087755529] [2022-11-22 01:10:03,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:03,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:10:04,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087755529] [2022-11-22 01:10:04,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087755529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524526482] [2022-11-22 01:10:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:04,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:04,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:04,732 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:04,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:10:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:10:05,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:10:05,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:10:05,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524526482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:05,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:10:05,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-11-22 01:10:05,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092037003] [2022-11-22 01:10:05,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:05,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:10:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:05,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:10:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:10:05,304 INFO L87 Difference]: Start difference. First operand 4062 states and 6380 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:10:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:06,197 INFO L93 Difference]: Finished difference Result 8449 states and 13578 transitions. [2022-11-22 01:10:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:10:06,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 99 [2022-11-22 01:10:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:06,243 INFO L225 Difference]: With dead ends: 8449 [2022-11-22 01:10:06,243 INFO L226 Difference]: Without dead ends: 5228 [2022-11-22 01:10:06,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:10:06,269 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 139 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:06,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 3166 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:10:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2022-11-22 01:10:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 4286. [2022-11-22 01:10:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 2893 states have (on average 1.4811614241272035) internal successors, (4285), 3143 states have internal predecessors, (4285), 1136 states have call successors, (1136), 248 states have call predecessors, (1136), 256 states have return successors, (1327), 1048 states have call predecessors, (1327), 1130 states have call successors, (1327) [2022-11-22 01:10:06,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 6748 transitions. [2022-11-22 01:10:06,843 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 6748 transitions. Word has length 99 [2022-11-22 01:10:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:06,844 INFO L495 AbstractCegarLoop]: Abstraction has 4286 states and 6748 transitions. [2022-11-22 01:10:06,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-22 01:10:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 6748 transitions. [2022-11-22 01:10:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-22 01:10:06,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:06,848 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:06,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:07,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:10:07,058 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2105034181, now seen corresponding path program 1 times [2022-11-22 01:10:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:07,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525002509] [2022-11-22 01:10:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:07,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:10:07,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:07,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525002509] [2022-11-22 01:10:07,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525002509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:07,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713596193] [2022-11-22 01:10:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:07,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:07,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:07,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:07,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:10:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:08,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:10:08,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:10:08,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:10:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 01:10:09,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713596193] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:09,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:10:09,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-11-22 01:10:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273319518] [2022-11-22 01:10:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:09,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:10:09,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:10:09,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:10:09,153 INFO L87 Difference]: Start difference. First operand 4286 states and 6748 transitions. Second operand has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-22 01:10:14,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:14,826 INFO L93 Difference]: Finished difference Result 11696 states and 19385 transitions. [2022-11-22 01:10:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 01:10:14,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 103 [2022-11-22 01:10:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:14,964 INFO L225 Difference]: With dead ends: 11696 [2022-11-22 01:10:14,964 INFO L226 Difference]: Without dead ends: 8617 [2022-11-22 01:10:14,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:10:14,997 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 3093 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 1445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3180 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 4091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1445 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:14,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3180 Valid, 2981 Invalid, 4091 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1445 Valid, 2646 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-22 01:10:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8617 states. [2022-11-22 01:10:15,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8617 to 7416. [2022-11-22 01:10:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 5222 states have (on average 1.4854461891995403) internal successors, (7757), 5512 states have internal predecessors, (7757), 1671 states have call successors, (1671), 484 states have call predecessors, (1671), 522 states have return successors, (2400), 1563 states have call predecessors, (2400), 1663 states have call successors, (2400) [2022-11-22 01:10:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 11828 transitions. [2022-11-22 01:10:15,926 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 11828 transitions. Word has length 103 [2022-11-22 01:10:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:15,927 INFO L495 AbstractCegarLoop]: Abstraction has 7416 states and 11828 transitions. [2022-11-22 01:10:15,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 4 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-22 01:10:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 11828 transitions. [2022-11-22 01:10:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-22 01:10:15,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:15,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-22 01:10:15,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-22 01:10:16,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:16,141 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash 27441700, now seen corresponding path program 1 times [2022-11-22 01:10:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:16,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715360965] [2022-11-22 01:10:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:16,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:10:16,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:16,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715360965] [2022-11-22 01:10:16,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715360965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:16,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659627218] [2022-11-22 01:10:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:16,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:16,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:16,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:16,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:10:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:17,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:10:17,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:10:17,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:10:17,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659627218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:17,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:10:17,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-11-22 01:10:17,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141010667] [2022-11-22 01:10:17,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:17,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:10:17,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:17,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:10:17,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:10:17,532 INFO L87 Difference]: Start difference. First operand 7416 states and 11828 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-22 01:10:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:18,983 INFO L93 Difference]: Finished difference Result 13639 states and 21806 transitions. [2022-11-22 01:10:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:10:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) Word has length 107 [2022-11-22 01:10:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:19,043 INFO L225 Difference]: With dead ends: 13639 [2022-11-22 01:10:19,043 INFO L226 Difference]: Without dead ends: 7438 [2022-11-22 01:10:19,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:10:19,083 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 424 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:19,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2597 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:10:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2022-11-22 01:10:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 7416. [2022-11-22 01:10:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 5222 states have (on average 1.4854461891995403) internal successors, (7757), 5512 states have internal predecessors, (7757), 1671 states have call successors, (1671), 484 states have call predecessors, (1671), 522 states have return successors, (2392), 1563 states have call predecessors, (2392), 1663 states have call successors, (2392) [2022-11-22 01:10:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 11820 transitions. [2022-11-22 01:10:19,952 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 11820 transitions. Word has length 107 [2022-11-22 01:10:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:19,953 INFO L495 AbstractCegarLoop]: Abstraction has 7416 states and 11820 transitions. [2022-11-22 01:10:19,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (20), 3 states have call predecessors, (20), 4 states have call successors, (20) [2022-11-22 01:10:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 11820 transitions. [2022-11-22 01:10:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-22 01:10:19,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:19,961 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:19,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 01:10:20,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:20,170 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1596106138, now seen corresponding path program 1 times [2022-11-22 01:10:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:20,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215429190] [2022-11-22 01:10:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 01:10:20,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:20,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215429190] [2022-11-22 01:10:20,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215429190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:20,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520886673] [2022-11-22 01:10:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:20,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:20,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:20,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:20,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:10:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:21,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:10:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-22 01:10:21,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:10:21,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520886673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:21,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:10:21,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-11-22 01:10:21,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317943784] [2022-11-22 01:10:21,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:21,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:10:21,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:21,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:10:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:10:21,673 INFO L87 Difference]: Start difference. First operand 7416 states and 11820 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-22 01:10:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:24,619 INFO L93 Difference]: Finished difference Result 25214 states and 43217 transitions. [2022-11-22 01:10:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:10:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 134 [2022-11-22 01:10:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:24,808 INFO L225 Difference]: With dead ends: 25214 [2022-11-22 01:10:24,808 INFO L226 Difference]: Without dead ends: 17810 [2022-11-22 01:10:25,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:10:25,027 INFO L413 NwaCegarLoop]: 987 mSDtfsCounter, 795 mSDsluCounter, 3023 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 4010 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:25,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 4010 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 01:10:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17810 states. [2022-11-22 01:10:26,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17810 to 14718. [2022-11-22 01:10:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14718 states, 10400 states have (on average 1.4820192307692308) internal successors, (15413), 10992 states have internal predecessors, (15413), 3321 states have call successors, (3321), 917 states have call predecessors, (3321), 996 states have return successors, (5519), 3054 states have call predecessors, (5519), 3309 states have call successors, (5519) [2022-11-22 01:10:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14718 states to 14718 states and 24253 transitions. [2022-11-22 01:10:27,121 INFO L78 Accepts]: Start accepts. Automaton has 14718 states and 24253 transitions. Word has length 134 [2022-11-22 01:10:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:27,122 INFO L495 AbstractCegarLoop]: Abstraction has 14718 states and 24253 transitions. [2022-11-22 01:10:27,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-11-22 01:10:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 14718 states and 24253 transitions. [2022-11-22 01:10:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-22 01:10:27,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:27,129 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:27,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-22 01:10:27,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:10:27,339 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:27,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1842273458, now seen corresponding path program 1 times [2022-11-22 01:10:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:27,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844597526] [2022-11-22 01:10:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:27,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-22 01:10:28,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:28,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844597526] [2022-11-22 01:10:28,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844597526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:28,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:10:28,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-22 01:10:28,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165007660] [2022-11-22 01:10:28,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:28,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:10:28,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:28,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:10:28,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:10:28,397 INFO L87 Difference]: Start difference. First operand 14718 states and 24253 transitions. Second operand has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-22 01:10:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:40,448 INFO L93 Difference]: Finished difference Result 55482 states and 95732 transitions. [2022-11-22 01:10:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-22 01:10:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) Word has length 140 [2022-11-22 01:10:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:40,860 INFO L225 Difference]: With dead ends: 55482 [2022-11-22 01:10:40,860 INFO L226 Difference]: Without dead ends: 40776 [2022-11-22 01:10:41,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 01:10:41,031 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 3334 mSDsluCounter, 3563 mSDsCounter, 0 mSdLazyCounter, 7632 mSolverCounterSat, 1497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 4118 SdHoareTripleChecker+Invalid, 9129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1497 IncrementalHoareTripleChecker+Valid, 7632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:41,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 4118 Invalid, 9129 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1497 Valid, 7632 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-22 01:10:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40776 states. [2022-11-22 01:10:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40776 to 35281. [2022-11-22 01:10:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35281 states, 25970 states have (on average 1.4867539468617637) internal successors, (38611), 26922 states have internal predecessors, (38611), 6528 states have call successors, (6528), 2517 states have call predecessors, (6528), 2782 states have return successors, (10695), 6267 states have call predecessors, (10695), 6508 states have call successors, (10695) [2022-11-22 01:10:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35281 states to 35281 states and 55834 transitions. [2022-11-22 01:10:45,616 INFO L78 Accepts]: Start accepts. Automaton has 35281 states and 55834 transitions. Word has length 140 [2022-11-22 01:10:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:45,621 INFO L495 AbstractCegarLoop]: Abstraction has 35281 states and 55834 transitions. [2022-11-22 01:10:45,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 7 states have call predecessors, (24), 5 states have call successors, (24) [2022-11-22 01:10:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 35281 states and 55834 transitions. [2022-11-22 01:10:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-22 01:10:45,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:45,634 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:45,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:10:45,635 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:45,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1036114187, now seen corresponding path program 1 times [2022-11-22 01:10:45,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:45,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392147491] [2022-11-22 01:10:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:45,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-22 01:10:45,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:45,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392147491] [2022-11-22 01:10:45,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392147491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:45,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:10:45,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:10:45,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112518517] [2022-11-22 01:10:45,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:45,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:10:45,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:10:45,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:10:45,804 INFO L87 Difference]: Start difference. First operand 35281 states and 55834 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-22 01:10:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:51,384 INFO L93 Difference]: Finished difference Result 82436 states and 132249 transitions. [2022-11-22 01:10:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:10:51,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 173 [2022-11-22 01:10:51,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:51,904 INFO L225 Difference]: With dead ends: 82436 [2022-11-22 01:10:51,904 INFO L226 Difference]: Without dead ends: 47167 [2022-11-22 01:10:52,192 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 [2022-11-22 01:10:52,193 INFO L413 NwaCegarLoop]: 810 mSDtfsCounter, 527 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:52,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1390 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:10:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47167 states. [2022-11-22 01:10:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47167 to 46798. [2022-11-22 01:10:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46798 states, 34496 states have (on average 1.4868100649350648) internal successors, (51289), 35774 states have internal predecessors, (51289), 8604 states have call successors, (8604), 3326 states have call predecessors, (8604), 3697 states have return successors, (14202), 8267 states have call predecessors, (14202), 8584 states have call successors, (14202) [2022-11-22 01:10:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46798 states to 46798 states and 74095 transitions. [2022-11-22 01:10:57,503 INFO L78 Accepts]: Start accepts. Automaton has 46798 states and 74095 transitions. Word has length 173 [2022-11-22 01:10:57,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:57,504 INFO L495 AbstractCegarLoop]: Abstraction has 46798 states and 74095 transitions. [2022-11-22 01:10:57,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-22 01:10:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 46798 states and 74095 transitions. [2022-11-22 01:10:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-22 01:10:57,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:57,522 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:57,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:10:57,523 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:57,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1134990666, now seen corresponding path program 1 times [2022-11-22 01:10:57,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:57,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022244783] [2022-11-22 01:10:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:57,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-22 01:10:58,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:58,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022244783] [2022-11-22 01:10:58,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022244783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:58,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526885954] [2022-11-22 01:10:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:58,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:58,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:58,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:58,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8116a452-4230-4f16-a1bb-6b9b4e5b93db/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:10:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:10:58,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-22 01:10:58,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:10:58,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526885954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:58,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:10:58,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2022-11-22 01:10:58,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175519747] [2022-11-22 01:10:58,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:58,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:10:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:58,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:10:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:10:59,000 INFO L87 Difference]: Start difference. First operand 46798 states and 74095 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2022-11-22 01:11:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:11:07,683 INFO L93 Difference]: Finished difference Result 124608 states and 199792 transitions. [2022-11-22 01:11:07,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:11:07,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) Word has length 178 [2022-11-22 01:11:07,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:11:08,436 INFO L225 Difference]: With dead ends: 124608 [2022-11-22 01:11:08,436 INFO L226 Difference]: Without dead ends: 81042 [2022-11-22 01:11:08,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:11:08,636 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 710 mSDsluCounter, 3901 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 4636 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:11:08,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 4636 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:11:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81042 states.