./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:48:45,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:48:45,450 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:48:45,460 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:48:45,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:48:45,500 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:48:45,501 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:48:45,501 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:48:45,502 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:48:45,507 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:48:45,508 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:48:45,509 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:48:45,510 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:48:45,511 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:48:45,512 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:48:45,512 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:48:45,512 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:48:45,513 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:48:45,513 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:48:45,514 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:48:45,514 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:48:45,515 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:48:45,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:48:45,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:48:45,517 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:48:45,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:48:45,518 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:48:45,518 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:48:45,518 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:48:45,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:48:45,520 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:48:45,520 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:48:45,521 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:48:45,543 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:48:45,544 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:48:45,544 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:48:45,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:45,544 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:48:45,544 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:48:45,545 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:48:45,545 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:48:45,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:48:45,546 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:48:45,546 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:48:45,546 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:48:45,546 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11bb1f05736dca729c358ce9b340534ff3d0ef3cd2b5d7b8f4dea43dade9112f [2023-11-12 00:48:45,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:48:45,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:48:45,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:48:45,870 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:48:45,870 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:48:45,873 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2023-11-12 00:48:48,894 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:48:49,378 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:48:49,378 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c [2023-11-12 00:48:49,408 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/data/05988b01c/948ae074f4e9435d89762fcbbcff13f1/FLAG400220773 [2023-11-12 00:48:49,421 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/data/05988b01c/948ae074f4e9435d89762fcbbcff13f1 [2023-11-12 00:48:49,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:48:49,425 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:48:49,427 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:49,427 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:48:49,432 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:48:49,433 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:49" (1/1) ... [2023-11-12 00:48:49,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@436dafa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:49, skipping insertion in model container [2023-11-12 00:48:49,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:48:49" (1/1) ... [2023-11-12 00:48:49,526 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:48:50,081 WARN L240 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_0a3c2c89-8469-4312-96f4-24c1a3748d30/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2023-11-12 00:48:50,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:50,128 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:48:50,139 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2023-11-12 00:48:50,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [414] [2023-11-12 00:48:50,141 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [516] [2023-11-12 00:48:50,141 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [873] [2023-11-12 00:48:50,141 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2432] [2023-11-12 00:48:50,142 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3093] [2023-11-12 00:48:50,143 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3105] [2023-11-12 00:48:50,143 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification9_spec.i","") [3114] [2023-11-12 00:48:50,143 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3273] [2023-11-12 00:48:50,143 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3308] [2023-11-12 00:48:50,255 WARN L240 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_0a3c2c89-8469-4312-96f4-24c1a3748d30/sv-benchmarks/c/product-lines/elevator_spec9_product27.cil.c[66437,66450] [2023-11-12 00:48:50,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:48:50,302 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:48:50,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50 WrapperNode [2023-11-12 00:48:50,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:48:50,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:50,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:48:50,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:48:50,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,352 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,428 INFO L138 Inliner]: procedures = 95, calls = 339, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1121 [2023-11-12 00:48:50,428 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:48:50,429 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:48:50,429 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:48:50,429 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:48:50,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,448 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,483 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,549 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,567 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,585 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:48:50,589 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:48:50,591 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:48:50,591 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:48:50,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (1/1) ... [2023-11-12 00:48:50,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:48:50,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:48:50,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:48:50,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:48:50,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:48:50,699 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-12 00:48:50,699 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-12 00:48:50,700 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-12 00:48:50,700 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-12 00:48:50,700 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-12 00:48:50,700 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-12 00:48:50,701 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-12 00:48:50,701 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-12 00:48:50,701 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-12 00:48:50,702 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-12 00:48:50,702 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-12 00:48:50,703 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-12 00:48:50,703 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-12 00:48:50,704 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-12 00:48:50,704 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-12 00:48:50,705 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-12 00:48:50,705 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-12 00:48:50,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-12 00:48:50,708 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-12 00:48:50,708 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-12 00:48:50,708 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-12 00:48:50,709 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-12 00:48:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-12 00:48:50,710 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-12 00:48:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-12 00:48:50,710 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-12 00:48:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-12 00:48:50,711 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-12 00:48:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-12 00:48:50,711 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-12 00:48:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-12 00:48:50,711 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-12 00:48:50,711 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-12 00:48:50,712 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-12 00:48:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-12 00:48:50,712 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-12 00:48:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-12 00:48:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-12 00:48:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-11-12 00:48:50,713 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-11-12 00:48:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:48:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-12 00:48:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-12 00:48:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-12 00:48:50,714 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-12 00:48:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-12 00:48:50,715 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-12 00:48:50,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:48:50,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:48:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-12 00:48:50,716 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-12 00:48:50,934 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:48:50,937 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:48:52,351 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:48:53,277 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:48:53,278 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:48:53,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:53 BoogieIcfgContainer [2023-11-12 00:48:53,283 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:48:53,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:48:53,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:48:53,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:48:53,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:48:49" (1/3) ... [2023-11-12 00:48:53,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f90a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:53, skipping insertion in model container [2023-11-12 00:48:53,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:48:50" (2/3) ... [2023-11-12 00:48:53,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f90a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:48:53, skipping insertion in model container [2023-11-12 00:48:53,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:48:53" (3/3) ... [2023-11-12 00:48:53,296 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product27.cil.c [2023-11-12 00:48:53,316 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:48:53,317 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:48:53,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:48:53,405 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=LoopHeads, 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;@59efc012, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:48:53,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:48:53,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 365 states, 246 states have (on average 1.5934959349593496) internal successors, (392), 267 states have internal predecessors, (392), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-12 00:48:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-12 00:48:53,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:53,455 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:53,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:53,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:53,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1685455319, now seen corresponding path program 1 times [2023-11-12 00:48:53,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:53,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398848633] [2023-11-12 00:48:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:53,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:48:53,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:53,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398848633] [2023-11-12 00:48:53,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398848633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:53,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:53,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:48:53,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691081851] [2023-11-12 00:48:53,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:53,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:48:53,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:54,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:48:54,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:54,013 INFO L87 Difference]: Start difference. First operand has 365 states, 246 states have (on average 1.5934959349593496) internal successors, (392), 267 states have internal predecessors, (392), 93 states have call successors, (93), 24 states have call predecessors, (93), 24 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2023-11-12 00:48:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:54,181 INFO L93 Difference]: Finished difference Result 383 states and 605 transitions. [2023-11-12 00:48:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:48:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 77 [2023-11-12 00:48:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:54,213 INFO L225 Difference]: With dead ends: 383 [2023-11-12 00:48:54,214 INFO L226 Difference]: Without dead ends: 361 [2023-11-12 00:48:54,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:48:54,223 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:54,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 533 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-11-12 00:48:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2023-11-12 00:48:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 244 states have (on average 1.5819672131147542) internal successors, (386), 263 states have internal predecessors, (386), 93 states have call successors, (93), 24 states have call predecessors, (93), 23 states have return successors, (88), 86 states have call predecessors, (88), 88 states have call successors, (88) [2023-11-12 00:48:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 567 transitions. [2023-11-12 00:48:54,405 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 567 transitions. Word has length 77 [2023-11-12 00:48:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:54,407 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 567 transitions. [2023-11-12 00:48:54,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2023-11-12 00:48:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 567 transitions. [2023-11-12 00:48:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-12 00:48:54,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:54,415 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:54,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:48:54,416 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:54,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1228107108, now seen corresponding path program 1 times [2023-11-12 00:48:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:54,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25374563] [2023-11-12 00:48:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:54,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:48:55,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:55,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25374563] [2023-11-12 00:48:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25374563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:55,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:55,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:48:55,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603691784] [2023-11-12 00:48:55,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:55,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:48:55,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:55,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:48:55,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:48:55,072 INFO L87 Difference]: Start difference. First operand 361 states and 567 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-12 00:48:57,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:57,710 INFO L93 Difference]: Finished difference Result 1092 states and 1742 transitions. [2023-11-12 00:48:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:48:57,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2023-11-12 00:48:57,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:57,720 INFO L225 Difference]: With dead ends: 1092 [2023-11-12 00:48:57,721 INFO L226 Difference]: Without dead ends: 747 [2023-11-12 00:48:57,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:48:57,727 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1110 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 412 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 412 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:57,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 1367 Invalid, 2539 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [412 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 00:48:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2023-11-12 00:48:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 709. [2023-11-12 00:48:57,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 488 states have (on average 1.5942622950819672) internal successors, (778), 521 states have internal predecessors, (778), 176 states have call successors, (176), 44 states have call predecessors, (176), 44 states have return successors, (177), 168 states have call predecessors, (177), 171 states have call successors, (177) [2023-11-12 00:48:57,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1131 transitions. [2023-11-12 00:48:57,868 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1131 transitions. Word has length 78 [2023-11-12 00:48:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:57,871 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 1131 transitions. [2023-11-12 00:48:57,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-12 00:48:57,871 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1131 transitions. [2023-11-12 00:48:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-12 00:48:57,876 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:57,877 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:57,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:48:57,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:57,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash -677758014, now seen corresponding path program 1 times [2023-11-12 00:48:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:57,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277381784] [2023-11-12 00:48:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:57,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:48:58,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:58,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277381784] [2023-11-12 00:48:58,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277381784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:58,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:58,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:48:58,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849081328] [2023-11-12 00:48:58,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:58,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:48:58,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:58,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:48:58,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:48:58,360 INFO L87 Difference]: Start difference. First operand 709 states and 1131 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:48:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:59,105 INFO L93 Difference]: Finished difference Result 780 states and 1243 transitions. [2023-11-12 00:48:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:48:59,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2023-11-12 00:48:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:59,115 INFO L225 Difference]: With dead ends: 780 [2023-11-12 00:48:59,116 INFO L226 Difference]: Without dead ends: 765 [2023-11-12 00:48:59,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:48:59,125 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 661 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:59,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1741 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:48:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-11-12 00:48:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 713. [2023-11-12 00:48:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 492 states have (on average 1.589430894308943) internal successors, (782), 525 states have internal predecessors, (782), 176 states have call successors, (176), 44 states have call predecessors, (176), 44 states have return successors, (177), 168 states have call predecessors, (177), 171 states have call successors, (177) [2023-11-12 00:48:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1135 transitions. [2023-11-12 00:48:59,209 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1135 transitions. Word has length 82 [2023-11-12 00:48:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:59,210 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 1135 transitions. [2023-11-12 00:48:59,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:48:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1135 transitions. [2023-11-12 00:48:59,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 00:48:59,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:59,217 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:59,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:48:59,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:59,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:59,219 INFO L85 PathProgramCache]: Analyzing trace with hash 343391352, now seen corresponding path program 1 times [2023-11-12 00:48:59,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:59,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876931070] [2023-11-12 00:48:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:59,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:48:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:48:59,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:48:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876931070] [2023-11-12 00:48:59,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876931070] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:48:59,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:48:59,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:48:59,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173877795] [2023-11-12 00:48:59,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:48:59,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:48:59,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:48:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:48:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:48:59,526 INFO L87 Difference]: Start difference. First operand 713 states and 1135 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 00:48:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:48:59,735 INFO L93 Difference]: Finished difference Result 732 states and 1159 transitions. [2023-11-12 00:48:59,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:48:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 87 [2023-11-12 00:48:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:48:59,745 INFO L225 Difference]: With dead ends: 732 [2023-11-12 00:48:59,746 INFO L226 Difference]: Without dead ends: 717 [2023-11-12 00:48:59,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:48:59,756 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 30 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:48:59,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2092 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:48:59,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-11-12 00:48:59,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 713. [2023-11-12 00:48:59,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 492 states have (on average 1.5853658536585367) internal successors, (780), 525 states have internal predecessors, (780), 176 states have call successors, (176), 44 states have call predecessors, (176), 44 states have return successors, (177), 168 states have call predecessors, (177), 171 states have call successors, (177) [2023-11-12 00:48:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1133 transitions. [2023-11-12 00:48:59,874 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1133 transitions. Word has length 87 [2023-11-12 00:48:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:48:59,876 INFO L495 AbstractCegarLoop]: Abstraction has 713 states and 1133 transitions. [2023-11-12 00:48:59,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-12 00:48:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1133 transitions. [2023-11-12 00:48:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-12 00:48:59,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:48:59,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:48:59,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:48:59,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:48:59,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:48:59,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1540778606, now seen corresponding path program 1 times [2023-11-12 00:48:59,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:48:59,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146486654] [2023-11-12 00:48:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:48:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:48:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:49:00,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:00,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146486654] [2023-11-12 00:49:00,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146486654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:00,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:00,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:00,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491440740] [2023-11-12 00:49:00,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:00,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:00,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:00,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:00,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:00,115 INFO L87 Difference]: Start difference. First operand 713 states and 1133 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:00,409 INFO L93 Difference]: Finished difference Result 2073 states and 3329 transitions. [2023-11-12 00:49:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:00,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2023-11-12 00:49:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:00,424 INFO L225 Difference]: With dead ends: 2073 [2023-11-12 00:49:00,425 INFO L226 Difference]: Without dead ends: 1376 [2023-11-12 00:49:00,432 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 [2023-11-12 00:49:00,435 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 522 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:00,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1096 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:49:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-11-12 00:49:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1348. [2023-11-12 00:49:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 950 states have (on average 1.5989473684210527) internal successors, (1519), 1012 states have internal predecessors, (1519), 316 states have call successors, (316), 79 states have call predecessors, (316), 81 states have return successors, (330), 294 states have call predecessors, (330), 311 states have call successors, (330) [2023-11-12 00:49:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2165 transitions. [2023-11-12 00:49:00,553 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2165 transitions. Word has length 94 [2023-11-12 00:49:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:00,554 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 2165 transitions. [2023-11-12 00:49:00,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2165 transitions. [2023-11-12 00:49:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-12 00:49:00,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:00,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:00,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:49:00,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:00,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash 519365610, now seen corresponding path program 1 times [2023-11-12 00:49:00,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:00,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777561553] [2023-11-12 00:49:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:00,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:49:00,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777561553] [2023-11-12 00:49:00,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777561553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:00,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:00,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:00,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26556057] [2023-11-12 00:49:00,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:00,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:00,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:00,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:00,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:00,721 INFO L87 Difference]: Start difference. First operand 1348 states and 2165 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:01,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:01,069 INFO L93 Difference]: Finished difference Result 3977 states and 6448 transitions. [2023-11-12 00:49:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:01,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2023-11-12 00:49:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:01,103 INFO L225 Difference]: With dead ends: 3977 [2023-11-12 00:49:01,103 INFO L226 Difference]: Without dead ends: 2648 [2023-11-12 00:49:01,111 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 [2023-11-12 00:49:01,113 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 521 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:01,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 1103 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:49:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2023-11-12 00:49:01,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2619. [2023-11-12 00:49:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 1867 states have (on average 1.604713444027852) internal successors, (2996), 1987 states have internal predecessors, (2996), 596 states have call successors, (596), 149 states have call predecessors, (596), 155 states have return successors, (652), 546 states have call predecessors, (652), 591 states have call successors, (652) [2023-11-12 00:49:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 4244 transitions. [2023-11-12 00:49:01,356 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 4244 transitions. Word has length 95 [2023-11-12 00:49:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:01,358 INFO L495 AbstractCegarLoop]: Abstraction has 2619 states and 4244 transitions. [2023-11-12 00:49:01,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 4244 transitions. [2023-11-12 00:49:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-12 00:49:01,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:01,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:01,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:49:01,363 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:01,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1079662288, now seen corresponding path program 1 times [2023-11-12 00:49:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:01,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109061132] [2023-11-12 00:49:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:49:01,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109061132] [2023-11-12 00:49:01,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109061132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:01,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:01,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:01,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077872336] [2023-11-12 00:49:01,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:01,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:01,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:01,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:01,557 INFO L87 Difference]: Start difference. First operand 2619 states and 4244 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:02,040 INFO L93 Difference]: Finished difference Result 7786 states and 12764 transitions. [2023-11-12 00:49:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:02,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2023-11-12 00:49:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:02,094 INFO L225 Difference]: With dead ends: 7786 [2023-11-12 00:49:02,095 INFO L226 Difference]: Without dead ends: 5192 [2023-11-12 00:49:02,111 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 [2023-11-12 00:49:02,112 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 520 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:02,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 1109 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:49:02,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5192 states. [2023-11-12 00:49:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5192 to 5162. [2023-11-12 00:49:02,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 3702 states have (on average 1.606158833063209) internal successors, (5946), 3938 states have internal predecessors, (5946), 1156 states have call successors, (1156), 289 states have call predecessors, (1156), 303 states have return successors, (1356), 1050 states have call predecessors, (1356), 1151 states have call successors, (1356) [2023-11-12 00:49:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 8458 transitions. [2023-11-12 00:49:02,584 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 8458 transitions. Word has length 96 [2023-11-12 00:49:02,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:02,584 INFO L495 AbstractCegarLoop]: Abstraction has 5162 states and 8458 transitions. [2023-11-12 00:49:02,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 8458 transitions. [2023-11-12 00:49:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 00:49:02,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:02,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:02,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:49:02,590 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:02,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:02,590 INFO L85 PathProgramCache]: Analyzing trace with hash 890084332, now seen corresponding path program 1 times [2023-11-12 00:49:02,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:02,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194907970] [2023-11-12 00:49:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:02,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:49:02,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:02,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194907970] [2023-11-12 00:49:02,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194907970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:02,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:02,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:02,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117056327] [2023-11-12 00:49:02,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:02,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:02,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:02,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:02,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:02,765 INFO L87 Difference]: Start difference. First operand 5162 states and 8458 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:03,620 INFO L93 Difference]: Finished difference Result 15405 states and 25693 transitions. [2023-11-12 00:49:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:03,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2023-11-12 00:49:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:03,717 INFO L225 Difference]: With dead ends: 15405 [2023-11-12 00:49:03,717 INFO L226 Difference]: Without dead ends: 10280 [2023-11-12 00:49:03,748 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 [2023-11-12 00:49:03,750 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 519 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:03,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 1115 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:49:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10280 states. [2023-11-12 00:49:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10280 to 10249. [2023-11-12 00:49:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10249 states, 7373 states have (on average 1.605316696053167) internal successors, (11836), 7841 states have internal predecessors, (11836), 2276 states have call successors, (2276), 569 states have call predecessors, (2276), 599 states have return successors, (2992), 2058 states have call predecessors, (2992), 2271 states have call successors, (2992) [2023-11-12 00:49:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10249 states to 10249 states and 17104 transitions. [2023-11-12 00:49:04,650 INFO L78 Accepts]: Start accepts. Automaton has 10249 states and 17104 transitions. Word has length 97 [2023-11-12 00:49:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:04,651 INFO L495 AbstractCegarLoop]: Abstraction has 10249 states and 17104 transitions. [2023-11-12 00:49:04,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 10249 states and 17104 transitions. [2023-11-12 00:49:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-12 00:49:04,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:04,657 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:04,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:49:04,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:04,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:04,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1822691314, now seen corresponding path program 1 times [2023-11-12 00:49:04,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:04,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095826047] [2023-11-12 00:49:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:04,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 00:49:04,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:04,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095826047] [2023-11-12 00:49:04,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095826047] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:04,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:04,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:49:04,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018291565] [2023-11-12 00:49:04,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:04,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:49:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:04,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:49:04,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:49:04,796 INFO L87 Difference]: Start difference. First operand 10249 states and 17104 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:05,624 INFO L93 Difference]: Finished difference Result 10917 states and 18261 transitions. [2023-11-12 00:49:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:49:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2023-11-12 00:49:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:05,731 INFO L225 Difference]: With dead ends: 10917 [2023-11-12 00:49:05,731 INFO L226 Difference]: Without dead ends: 10906 [2023-11-12 00:49:05,737 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 [2023-11-12 00:49:05,740 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 505 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:05,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1113 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:49:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10906 states. [2023-11-12 00:49:06,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10906 to 10876. [2023-11-12 00:49:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10876 states, 7824 states have (on average 1.6046779141104295) internal successors, (12555), 8321 states have internal predecessors, (12555), 2416 states have call successors, (2416), 604 states have call predecessors, (2416), 635 states have return successors, (3234), 2183 states have call predecessors, (3234), 2411 states have call successors, (3234) [2023-11-12 00:49:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10876 states to 10876 states and 18205 transitions. [2023-11-12 00:49:06,782 INFO L78 Accepts]: Start accepts. Automaton has 10876 states and 18205 transitions. Word has length 98 [2023-11-12 00:49:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:06,782 INFO L495 AbstractCegarLoop]: Abstraction has 10876 states and 18205 transitions. [2023-11-12 00:49:06,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:49:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10876 states and 18205 transitions. [2023-11-12 00:49:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-12 00:49:06,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:06,790 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:06,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:49:06,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:06,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash 403012698, now seen corresponding path program 1 times [2023-11-12 00:49:06,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:06,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616616730] [2023-11-12 00:49:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:06,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 00:49:07,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:07,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616616730] [2023-11-12 00:49:07,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616616730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:07,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:49:07,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:49:07,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537351845] [2023-11-12 00:49:07,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:07,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:07,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:07,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:07,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:49:07,086 INFO L87 Difference]: Start difference. First operand 10876 states and 18205 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-12 00:49:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:08,094 INFO L93 Difference]: Finished difference Result 23129 states and 39584 transitions. [2023-11-12 00:49:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:49:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 147 [2023-11-12 00:49:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:08,179 INFO L225 Difference]: With dead ends: 23129 [2023-11-12 00:49:08,179 INFO L226 Difference]: Without dead ends: 12270 [2023-11-12 00:49:08,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:49:08,244 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 90 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:08,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1609 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:49:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12270 states. [2023-11-12 00:49:09,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12270 to 11232. [2023-11-12 00:49:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 8132 states have (on average 1.5975159862272503) internal successors, (12991), 8629 states have internal predecessors, (12991), 2448 states have call successors, (2448), 604 states have call predecessors, (2448), 651 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2023-11-12 00:49:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 18786 transitions. [2023-11-12 00:49:09,245 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 18786 transitions. Word has length 147 [2023-11-12 00:49:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:09,247 INFO L495 AbstractCegarLoop]: Abstraction has 11232 states and 18786 transitions. [2023-11-12 00:49:09,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-12 00:49:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 18786 transitions. [2023-11-12 00:49:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-12 00:49:09,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:09,255 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:09,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 00:49:09,256 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:09,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1266705204, now seen corresponding path program 1 times [2023-11-12 00:49:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:09,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956296615] [2023-11-12 00:49:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:09,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-12 00:49:09,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956296615] [2023-11-12 00:49:09,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956296615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:09,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110505328] [2023-11-12 00:49:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:09,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:09,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:09,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:09,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:49:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:10,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:49:10,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-12 00:49:10,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110505328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:10,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:10,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-12 00:49:10,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056156674] [2023-11-12 00:49:10,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:10,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:10,125 INFO L87 Difference]: Start difference. First operand 11232 states and 18786 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 00:49:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:11,439 INFO L93 Difference]: Finished difference Result 23773 states and 40784 transitions. [2023-11-12 00:49:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:49:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 150 [2023-11-12 00:49:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:11,551 INFO L225 Difference]: With dead ends: 23773 [2023-11-12 00:49:11,551 INFO L226 Difference]: Without dead ends: 12558 [2023-11-12 00:49:11,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:49:11,614 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 213 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:11,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1365 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:49:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12558 states. [2023-11-12 00:49:12,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12558 to 12558. [2023-11-12 00:49:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12558 states, 9424 states have (on average 1.6418718166383701) internal successors, (15473), 9921 states have internal predecessors, (15473), 2448 states have call successors, (2448), 638 states have call predecessors, (2448), 685 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2023-11-12 00:49:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12558 states to 12558 states and 21268 transitions. [2023-11-12 00:49:12,762 INFO L78 Accepts]: Start accepts. Automaton has 12558 states and 21268 transitions. Word has length 150 [2023-11-12 00:49:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:12,763 INFO L495 AbstractCegarLoop]: Abstraction has 12558 states and 21268 transitions. [2023-11-12 00:49:12,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 00:49:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 12558 states and 21268 transitions. [2023-11-12 00:49:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-12 00:49:12,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:12,776 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:12,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:12,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:12,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:12,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash 489114329, now seen corresponding path program 1 times [2023-11-12 00:49:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:12,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374866977] [2023-11-12 00:49:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:12,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-12 00:49:13,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:13,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374866977] [2023-11-12 00:49:13,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374866977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:13,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021790451] [2023-11-12 00:49:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:13,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:13,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:13,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:13,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:49:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:13,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 1849 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:49:13,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-12 00:49:13,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:13,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021790451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:13,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:13,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-12 00:49:13,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219532798] [2023-11-12 00:49:13,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:13,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:13,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:13,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:13,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:49:13,962 INFO L87 Difference]: Start difference. First operand 12558 states and 21268 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 00:49:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:14,935 INFO L93 Difference]: Finished difference Result 26425 states and 45714 transitions. [2023-11-12 00:49:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:49:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 155 [2023-11-12 00:49:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:15,037 INFO L225 Difference]: With dead ends: 26425 [2023-11-12 00:49:15,038 INFO L226 Difference]: Without dead ends: 13884 [2023-11-12 00:49:15,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:49:15,089 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 211 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:15,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1365 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:49:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13884 states. [2023-11-12 00:49:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13884 to 13884. [2023-11-12 00:49:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13884 states, 10716 states have (on average 1.675531914893617) internal successors, (17955), 11213 states have internal predecessors, (17955), 2448 states have call successors, (2448), 672 states have call predecessors, (2448), 719 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2023-11-12 00:49:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13884 states to 13884 states and 23750 transitions. [2023-11-12 00:49:16,325 INFO L78 Accepts]: Start accepts. Automaton has 13884 states and 23750 transitions. Word has length 155 [2023-11-12 00:49:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:16,326 INFO L495 AbstractCegarLoop]: Abstraction has 13884 states and 23750 transitions. [2023-11-12 00:49:16,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 00:49:16,326 INFO L276 IsEmpty]: Start isEmpty. Operand 13884 states and 23750 transitions. [2023-11-12 00:49:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-12 00:49:16,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:16,335 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:16,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:49:16,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:16,544 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:16,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:16,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1693968881, now seen corresponding path program 1 times [2023-11-12 00:49:16,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:16,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152508970] [2023-11-12 00:49:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-12 00:49:18,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:18,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152508970] [2023-11-12 00:49:18,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152508970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:18,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133017624] [2023-11-12 00:49:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:18,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:18,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:18,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:18,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:49:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:19,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:49:19,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:49:19,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:19,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133017624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:19,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:19,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-11-12 00:49:19,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695517388] [2023-11-12 00:49:19,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:19,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:19,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:49:19,485 INFO L87 Difference]: Start difference. First operand 13884 states and 23750 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 00:49:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:20,615 INFO L93 Difference]: Finished difference Result 29077 states and 50644 transitions. [2023-11-12 00:49:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:49:20,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 159 [2023-11-12 00:49:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:20,715 INFO L225 Difference]: With dead ends: 29077 [2023-11-12 00:49:20,715 INFO L226 Difference]: Without dead ends: 15210 [2023-11-12 00:49:20,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2023-11-12 00:49:20,771 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 209 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:20,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1365 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:49:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15210 states. [2023-11-12 00:49:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15210 to 15210. [2023-11-12 00:49:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15210 states, 12008 states have (on average 1.7019487008660892) internal successors, (20437), 12505 states have internal predecessors, (20437), 2448 states have call successors, (2448), 706 states have call predecessors, (2448), 753 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2023-11-12 00:49:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15210 states to 15210 states and 26232 transitions. [2023-11-12 00:49:21,878 INFO L78 Accepts]: Start accepts. Automaton has 15210 states and 26232 transitions. Word has length 159 [2023-11-12 00:49:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:21,878 INFO L495 AbstractCegarLoop]: Abstraction has 15210 states and 26232 transitions. [2023-11-12 00:49:21,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 00:49:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 15210 states and 26232 transitions. [2023-11-12 00:49:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-12 00:49:21,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:21,887 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:21,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:22,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:22,095 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:22,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash 758601414, now seen corresponding path program 1 times [2023-11-12 00:49:22,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:22,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368656428] [2023-11-12 00:49:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:22,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-12 00:49:24,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368656428] [2023-11-12 00:49:24,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368656428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211232546] [2023-11-12 00:49:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:24,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:24,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:24,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:24,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:49:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:24,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:49:24,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:49:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-12 00:49:24,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:49:24,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211232546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:49:24,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:49:24,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [22] total 24 [2023-11-12 00:49:24,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514514778] [2023-11-12 00:49:24,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:49:24,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:49:24,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:49:24,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:49:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:49:24,884 INFO L87 Difference]: Start difference. First operand 15210 states and 26232 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 00:49:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:49:25,792 INFO L93 Difference]: Finished difference Result 31729 states and 55574 transitions. [2023-11-12 00:49:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:49:25,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 162 [2023-11-12 00:49:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:49:25,889 INFO L225 Difference]: With dead ends: 31729 [2023-11-12 00:49:25,889 INFO L226 Difference]: Without dead ends: 16536 [2023-11-12 00:49:25,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2023-11-12 00:49:25,948 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 207 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:49:25,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1365 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:49:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16536 states. [2023-11-12 00:49:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16536 to 16536. [2023-11-12 00:49:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16536 states, 13300 states have (on average 1.723233082706767) internal successors, (22919), 13797 states have internal predecessors, (22919), 2448 states have call successors, (2448), 740 states have call predecessors, (2448), 787 states have return successors, (3347), 2215 states have call predecessors, (3347), 2443 states have call successors, (3347) [2023-11-12 00:49:26,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16536 states to 16536 states and 28714 transitions. [2023-11-12 00:49:26,991 INFO L78 Accepts]: Start accepts. Automaton has 16536 states and 28714 transitions. Word has length 162 [2023-11-12 00:49:26,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:49:26,992 INFO L495 AbstractCegarLoop]: Abstraction has 16536 states and 28714 transitions. [2023-11-12 00:49:26,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-12 00:49:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 16536 states and 28714 transitions. [2023-11-12 00:49:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-12 00:49:27,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:49:27,001 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:49:27,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:49:27,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:27,211 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:49:27,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:49:27,211 INFO L85 PathProgramCache]: Analyzing trace with hash 880135352, now seen corresponding path program 1 times [2023-11-12 00:49:27,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:49:27,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756904954] [2023-11-12 00:49:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:27,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:49:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-12 00:49:29,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:49:29,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756904954] [2023-11-12 00:49:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756904954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:49:29,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269685936] [2023-11-12 00:49:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:49:29,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:49:29,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:29,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:49:29,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a3c2c89-8469-4312-96f4-24c1a3748d30/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:49:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:49:29,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 1852 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:49:29,643 INFO L285 TraceCheckSpWp]: Computing forward predicates...