./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91 --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 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:55:42,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:55:42,398 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:55:42,404 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:55:42,405 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:55:42,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:55:42,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:55:42,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:55:42,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:55:42,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:55:42,436 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:55:42,436 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:55:42,437 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:55:42,437 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:55:42,438 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:55:42,438 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:55:42,439 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:55:42,440 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:55:42,440 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:55:42,441 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:55:42,441 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:55:42,442 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:55:42,443 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:55:42,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:55:42,444 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:55:42,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:55:42,446 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:55:42,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:55:42,447 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:55:42,447 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:55:42,448 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:55:42,448 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:55:42,449 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:55:42,449 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:55:42,450 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:55:42,450 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:55:42,450 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:55:42,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:42,451 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:55:42,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:55:42,452 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:55:42,453 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:55:42,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:55:42,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:55:42,454 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:55:42,454 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:55:42,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:55:42,454 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_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 859441835e916fdbcdc78c3c849990624cc8f637b8bbdd3bb312aaefa9b36e0f [2023-11-24 23:55:42,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:55:42,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:55:42,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:55:42,800 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:55:42,801 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:55:42,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2023-11-24 23:55:45,944 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:55:46,322 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:55:46,322 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c [2023-11-24 23:55:46,363 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/data/09c168dff/5487d092d37f4cecb94dcb9af3970d06/FLAG13e1ee515 [2023-11-24 23:55:46,380 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/data/09c168dff/5487d092d37f4cecb94dcb9af3970d06 [2023-11-24 23:55:46,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:55:46,393 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:55:46,399 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:46,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:55:46,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:55:46,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:46" (1/1) ... [2023-11-24 23:55:46,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c43d6cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:46, skipping insertion in model container [2023-11-24 23:55:46,409 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:46" (1/1) ... [2023-11-24 23:55:46,513 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:55:47,041 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_c52e21b0-8c4c-4be6-b43e-f32ffea61830/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2023-11-24 23:55:47,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:47,260 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:55:47,270 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-11-24 23:55:47,272 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [716] [2023-11-24 23:55:47,272 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [837] [2023-11-24 23:55:47,273 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [851] [2023-11-24 23:55:47,273 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1217] [2023-11-24 23:55:47,273 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1226] [2023-11-24 23:55:47,274 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1264] [2023-11-24 23:55:47,274 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1622] [2023-11-24 23:55:47,274 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [3131] [2023-11-24 23:55:47,274 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3312] [2023-11-24 23:55:47,379 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_c52e21b0-8c4c-4be6-b43e-f32ffea61830/sv-benchmarks/c/product-lines/elevator_spec2_product03.cil.c[29828,29841] [2023-11-24 23:55:47,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:47,483 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:55:47,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47 WrapperNode [2023-11-24 23:55:47,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:47,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:47,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:55:47,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:55:47,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,583 INFO L138 Inliner]: procedures = 92, calls = 336, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1070 [2023-11-24 23:55:47,583 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:47,584 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:55:47,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:55:47,584 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:55:47,595 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,602 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,603 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,628 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,649 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,665 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:55:47,666 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:55:47,667 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:55:47,667 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:55:47,668 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (1/1) ... [2023-11-24 23:55:47,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:47,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:47,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:55:47,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c52e21b0-8c4c-4be6-b43e-f32ffea61830/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:55:47,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:55:47,823 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-24 23:55:47,823 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-24 23:55:47,824 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:55:47,824 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:55:47,825 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-24 23:55:47,825 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-24 23:55:47,825 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:55:47,826 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:55:47,826 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:55:47,826 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:55:47,827 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:55:47,828 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:55:47,828 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:55:47,828 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:55:47,828 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-24 23:55:47,831 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-24 23:55:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:55:47,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:55:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:55:47,832 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:55:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:55:47,832 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:55:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:55:47,832 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:55:47,833 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-24 23:55:47,833 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-24 23:55:47,833 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:55:47,833 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:55:47,833 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:55:47,833 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:55:47,834 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:55:47,834 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:55:47,834 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:55:47,834 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:55:47,834 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:55:47,834 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:55:47,834 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2023-11-24 23:55:47,835 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2023-11-24 23:55:47,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:55:47,835 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:55:47,835 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:55:47,835 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:55:47,835 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:55:47,836 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:55:47,836 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:55:47,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:55:47,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:55:47,836 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:55:47,837 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:55:48,057 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:55:48,061 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:55:49,444 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:55:50,403 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:55:50,403 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:55:50,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:50 BoogieIcfgContainer [2023-11-24 23:55:50,405 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:55:50,409 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:55:50,409 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:55:50,412 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:55:50,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:55:46" (1/3) ... [2023-11-24 23:55:50,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c98d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:50, skipping insertion in model container [2023-11-24 23:55:50,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:47" (2/3) ... [2023-11-24 23:55:50,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c98d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:50, skipping insertion in model container [2023-11-24 23:55:50,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:50" (3/3) ... [2023-11-24 23:55:50,418 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product03.cil.c [2023-11-24 23:55:50,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:55:50,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:55:50,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:55:50,539 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;@487b04dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:55:50,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:55:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-24 23:55:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-24 23:55:50,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:50,576 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 23:55:50,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:55:50,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:50,583 INFO L85 PathProgramCache]: Analyzing trace with hash -89679758, now seen corresponding path program 1 times [2023-11-24 23:55:50,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:50,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394765341] [2023-11-24 23:55:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:50,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:55:51,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:51,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394765341] [2023-11-24 23:55:51,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394765341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:51,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:51,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:55:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264423486] [2023-11-24 23:55:51,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:51,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:55:51,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:51,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:55:51,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:55:51,350 INFO L87 Difference]: Start difference. First operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-24 23:55:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:51,531 INFO L93 Difference]: Finished difference Result 386 states and 614 transitions. [2023-11-24 23:55:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:55:51,534 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 76 [2023-11-24 23:55:51,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:51,554 INFO L225 Difference]: With dead ends: 386 [2023-11-24 23:55:51,554 INFO L226 Difference]: Without dead ends: 364 [2023-11-24 23:55:51,558 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 [2023-11-24 23:55:51,562 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:51,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 547 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:55:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-24 23:55:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2023-11-24 23:55:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 247 states have (on average 1.591093117408907) internal successors, (393), 266 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2023-11-24 23:55:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 576 transitions. [2023-11-24 23:55:51,647 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 576 transitions. Word has length 76 [2023-11-24 23:55:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:51,649 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 576 transitions. [2023-11-24 23:55:51,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-24 23:55:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 576 transitions. [2023-11-24 23:55:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-24 23:55:51,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:51,657 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 23:55:51,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:55:51,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:55:51,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2005245585, now seen corresponding path program 1 times [2023-11-24 23:55:51,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:51,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474052352] [2023-11-24 23:55:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:51,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:55:52,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:52,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474052352] [2023-11-24 23:55:52,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474052352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:52,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:52,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:55:52,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548732249] [2023-11-24 23:55:52,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:52,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:55:52,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:55:52,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:55:52,432 INFO L87 Difference]: Start difference. First operand 364 states and 576 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-24 23:55:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:55,695 INFO L93 Difference]: Finished difference Result 1242 states and 1996 transitions. [2023-11-24 23:55:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 23:55:55,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 77 [2023-11-24 23:55:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:55,722 INFO L225 Difference]: With dead ends: 1242 [2023-11-24 23:55:55,722 INFO L226 Difference]: Without dead ends: 894 [2023-11-24 23:55:55,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-11-24 23:55:55,733 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1934 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1999 SdHoareTripleChecker+Valid, 2098 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:55,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1999 Valid, 2098 Invalid, 3178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [534 Valid, 2644 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-24 23:55:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-11-24 23:55:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 842. [2023-11-24 23:55:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 591 states have (on average 1.6125211505922166) internal successors, (953), 626 states have internal predecessors, (953), 201 states have call successors, (201), 47 states have call predecessors, (201), 49 states have return successors, (202), 193 states have call predecessors, (202), 196 states have call successors, (202) [2023-11-24 23:55:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1356 transitions. [2023-11-24 23:55:55,906 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1356 transitions. Word has length 77 [2023-11-24 23:55:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:55,908 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1356 transitions. [2023-11-24 23:55:55,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-24 23:55:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1356 transitions. [2023-11-24 23:55:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-24 23:55:55,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:55,916 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] [2023-11-24 23:55:55,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:55:55,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:55:55,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:55,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2111192272, now seen corresponding path program 1 times [2023-11-24 23:55:55,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:55,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710916986] [2023-11-24 23:55:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:55,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:55:56,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:56,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710916986] [2023-11-24 23:55:56,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710916986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:56,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:56,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:55:56,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635520485] [2023-11-24 23:55:56,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:56,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:55:56,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:56,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:55:56,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:55:56,426 INFO L87 Difference]: Start difference. First operand 842 states and 1356 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:55:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:58,911 INFO L93 Difference]: Finished difference Result 1469 states and 2367 transitions. [2023-11-24 23:55:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:55:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2023-11-24 23:55:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:58,921 INFO L225 Difference]: With dead ends: 1469 [2023-11-24 23:55:58,922 INFO L226 Difference]: Without dead ends: 967 [2023-11-24 23:55:58,925 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 [2023-11-24 23:55:58,927 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1135 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:58,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 1603 Invalid, 2561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-24 23:55:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2023-11-24 23:55:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 858. [2023-11-24 23:55:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 601 states have (on average 1.605657237936772) internal successors, (965), 639 states have internal predecessors, (965), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2023-11-24 23:55:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1378 transitions. [2023-11-24 23:55:59,027 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1378 transitions. Word has length 78 [2023-11-24 23:55:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:59,028 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1378 transitions. [2023-11-24 23:55:59,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:55:59,028 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1378 transitions. [2023-11-24 23:55:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-24 23:55:59,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:59,032 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] [2023-11-24 23:55:59,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:55:59,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:55:59,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1592921447, now seen corresponding path program 1 times [2023-11-24 23:55:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:59,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093112733] [2023-11-24 23:55:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:55:59,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:59,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093112733] [2023-11-24 23:55:59,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093112733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:59,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:55:59,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:55:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333482226] [2023-11-24 23:55:59,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:55:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:55:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:55:59,460 INFO L87 Difference]: Start difference. First operand 858 states and 1378 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:56:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:00,313 INFO L93 Difference]: Finished difference Result 929 states and 1490 transitions. [2023-11-24 23:56:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2023-11-24 23:56:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:00,330 INFO L225 Difference]: With dead ends: 929 [2023-11-24 23:56:00,331 INFO L226 Difference]: Without dead ends: 914 [2023-11-24 23:56:00,332 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 [2023-11-24 23:56:00,334 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 670 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:00,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1793 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:56:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2023-11-24 23:56:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 862. [2023-11-24 23:56:00,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 605 states have (on average 1.6016528925619835) internal successors, (969), 643 states have internal predecessors, (969), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2023-11-24 23:56:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1382 transitions. [2023-11-24 23:56:00,439 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1382 transitions. Word has length 82 [2023-11-24 23:56:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:00,440 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1382 transitions. [2023-11-24 23:56:00,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:56:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1382 transitions. [2023-11-24 23:56:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-24 23:56:00,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:00,445 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] [2023-11-24 23:56:00,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:56:00,445 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:00,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:00,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2002570338, now seen corresponding path program 1 times [2023-11-24 23:56:00,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:00,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410293054] [2023-11-24 23:56:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:00,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:56:00,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:00,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410293054] [2023-11-24 23:56:00,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410293054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:00,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:00,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:56:00,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519518641] [2023-11-24 23:56:00,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:00,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:56:00,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:00,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:56:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:00,773 INFO L87 Difference]: Start difference. First operand 862 states and 1382 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-24 23:56:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:01,005 INFO L93 Difference]: Finished difference Result 881 states and 1406 transitions. [2023-11-24 23:56:01,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:56:01,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2023-11-24 23:56:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:01,016 INFO L225 Difference]: With dead ends: 881 [2023-11-24 23:56:01,017 INFO L226 Difference]: Without dead ends: 866 [2023-11-24 23:56:01,018 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 [2023-11-24 23:56:01,024 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 30 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:01,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2148 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:56:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-11-24 23:56:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 862. [2023-11-24 23:56:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 605 states have (on average 1.5983471074380164) internal successors, (967), 643 states have internal predecessors, (967), 203 states have call successors, (203), 50 states have call predecessors, (203), 53 states have return successors, (210), 193 states have call predecessors, (210), 198 states have call successors, (210) [2023-11-24 23:56:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1380 transitions. [2023-11-24 23:56:01,127 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1380 transitions. Word has length 87 [2023-11-24 23:56:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:01,128 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1380 transitions. [2023-11-24 23:56:01,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-24 23:56:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1380 transitions. [2023-11-24 23:56:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-24 23:56:01,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:01,134 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] [2023-11-24 23:56:01,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:56:01,134 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:01,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2142876153, now seen corresponding path program 1 times [2023-11-24 23:56:01,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:01,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579269642] [2023-11-24 23:56:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:01,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:56:01,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:01,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579269642] [2023-11-24 23:56:01,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579269642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:01,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:01,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476053035] [2023-11-24 23:56:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:01,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:01,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:01,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:01,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:01,516 INFO L87 Difference]: Start difference. First operand 862 states and 1380 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:03,603 INFO L93 Difference]: Finished difference Result 2747 states and 4463 transitions. [2023-11-24 23:56:03,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2023-11-24 23:56:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:03,632 INFO L225 Difference]: With dead ends: 2747 [2023-11-24 23:56:03,632 INFO L226 Difference]: Without dead ends: 1901 [2023-11-24 23:56:03,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:03,646 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1146 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:03,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 676 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-24 23:56:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2023-11-24 23:56:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1735. [2023-11-24 23:56:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1239 states have (on average 1.6069410815173526) internal successors, (1991), 1312 states have internal predecessors, (1991), 393 states have call successors, (393), 91 states have call predecessors, (393), 102 states have return successors, (423), 367 states have call predecessors, (423), 388 states have call successors, (423) [2023-11-24 23:56:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 2807 transitions. [2023-11-24 23:56:03,864 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 2807 transitions. Word has length 94 [2023-11-24 23:56:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:03,866 INFO L495 AbstractCegarLoop]: Abstraction has 1735 states and 2807 transitions. [2023-11-24 23:56:03,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 2807 transitions. [2023-11-24 23:56:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-24 23:56:03,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:03,870 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] [2023-11-24 23:56:03,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:56:03,871 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:03,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:03,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2004786048, now seen corresponding path program 1 times [2023-11-24 23:56:03,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:03,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280846315] [2023-11-24 23:56:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:03,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:56:04,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280846315] [2023-11-24 23:56:04,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280846315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:04,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:04,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218411769] [2023-11-24 23:56:04,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:04,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:04,226 INFO L87 Difference]: Start difference. First operand 1735 states and 2807 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:06,191 INFO L93 Difference]: Finished difference Result 5298 states and 8687 transitions. [2023-11-24 23:56:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2023-11-24 23:56:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:06,234 INFO L225 Difference]: With dead ends: 5298 [2023-11-24 23:56:06,234 INFO L226 Difference]: Without dead ends: 3582 [2023-11-24 23:56:06,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:06,247 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1137 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:06,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 684 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-24 23:56:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2023-11-24 23:56:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3369. [2023-11-24 23:56:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 2429 states have (on average 1.6130094689172498) internal successors, (3918), 2579 states have internal predecessors, (3918), 736 states have call successors, (736), 173 states have call predecessors, (736), 203 states have return successors, (838), 678 states have call predecessors, (838), 731 states have call successors, (838) [2023-11-24 23:56:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 5492 transitions. [2023-11-24 23:56:06,639 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 5492 transitions. Word has length 95 [2023-11-24 23:56:06,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:06,640 INFO L495 AbstractCegarLoop]: Abstraction has 3369 states and 5492 transitions. [2023-11-24 23:56:06,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:06,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 5492 transitions. [2023-11-24 23:56:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-24 23:56:06,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:06,645 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] [2023-11-24 23:56:06,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:56:06,646 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:06,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:06,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2018956183, now seen corresponding path program 1 times [2023-11-24 23:56:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:06,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26578152] [2023-11-24 23:56:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:56:06,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26578152] [2023-11-24 23:56:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26578152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:06,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:06,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:06,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897951184] [2023-11-24 23:56:06,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:06,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:06,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:06,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:06,997 INFO L87 Difference]: Start difference. First operand 3369 states and 5492 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:09,582 INFO L93 Difference]: Finished difference Result 10242 states and 17011 transitions. [2023-11-24 23:56:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2023-11-24 23:56:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:09,724 INFO L225 Difference]: With dead ends: 10242 [2023-11-24 23:56:09,725 INFO L226 Difference]: Without dead ends: 6898 [2023-11-24 23:56:09,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:09,752 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1124 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:09,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 697 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-24 23:56:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6898 states. [2023-11-24 23:56:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6898 to 6582. [2023-11-24 23:56:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6582 states, 4764 states have (on average 1.6133501259445844) internal successors, (7686), 5074 states have internal predecessors, (7686), 1406 states have call successors, (1406), 337 states have call predecessors, (1406), 411 states have return successors, (1744), 1284 states have call predecessors, (1744), 1401 states have call successors, (1744) [2023-11-24 23:56:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6582 states to 6582 states and 10836 transitions. [2023-11-24 23:56:10,692 INFO L78 Accepts]: Start accepts. Automaton has 6582 states and 10836 transitions. Word has length 96 [2023-11-24 23:56:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:10,693 INFO L495 AbstractCegarLoop]: Abstraction has 6582 states and 10836 transitions. [2023-11-24 23:56:10,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 6582 states and 10836 transitions. [2023-11-24 23:56:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-24 23:56:10,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:10,699 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] [2023-11-24 23:56:10,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:56:10,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:10,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:10,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1836740834, now seen corresponding path program 1 times [2023-11-24 23:56:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:10,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603665117] [2023-11-24 23:56:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:10,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:56:10,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:10,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603665117] [2023-11-24 23:56:10,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603665117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:10,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:10,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:10,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43433071] [2023-11-24 23:56:10,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:10,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:10,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:10,980 INFO L87 Difference]: Start difference. First operand 6582 states and 10836 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:14,106 INFO L93 Difference]: Finished difference Result 19983 states and 33946 transitions. [2023-11-24 23:56:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:14,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2023-11-24 23:56:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:14,363 INFO L225 Difference]: With dead ends: 19983 [2023-11-24 23:56:14,363 INFO L226 Difference]: Without dead ends: 13438 [2023-11-24 23:56:14,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:14,423 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1111 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:14,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 707 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-24 23:56:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13438 states. [2023-11-24 23:56:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13438 to 12907. [2023-11-24 23:56:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12907 states, 9351 states have (on average 1.6107368195914875) internal successors, (15062), 9993 states have internal predecessors, (15062), 2716 states have call successors, (2716), 665 states have call predecessors, (2716), 839 states have return successors, (3854), 2466 states have call predecessors, (3854), 2711 states have call successors, (3854) [2023-11-24 23:56:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12907 states to 12907 states and 21632 transitions. [2023-11-24 23:56:16,308 INFO L78 Accepts]: Start accepts. Automaton has 12907 states and 21632 transitions. Word has length 97 [2023-11-24 23:56:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:16,309 INFO L495 AbstractCegarLoop]: Abstraction has 12907 states and 21632 transitions. [2023-11-24 23:56:16,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:16,309 INFO L276 IsEmpty]: Start isEmpty. Operand 12907 states and 21632 transitions. [2023-11-24 23:56:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-24 23:56:16,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:16,314 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] [2023-11-24 23:56:16,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:56:16,314 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:16,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:16,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1104267979, now seen corresponding path program 1 times [2023-11-24 23:56:16,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:16,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918894592] [2023-11-24 23:56:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:16,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:56:16,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:16,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918894592] [2023-11-24 23:56:16,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918894592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:16,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:16,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:16,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038023999] [2023-11-24 23:56:16,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:16,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:16,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:16,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:16,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:16,637 INFO L87 Difference]: Start difference. First operand 12907 states and 21632 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:20,560 INFO L93 Difference]: Finished difference Result 39256 states and 69522 transitions. [2023-11-24 23:56:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:56:20,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2023-11-24 23:56:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:20,816 INFO L225 Difference]: With dead ends: 39256 [2023-11-24 23:56:20,817 INFO L226 Difference]: Without dead ends: 26400 [2023-11-24 23:56:20,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:20,926 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1103 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:20,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 722 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-24 23:56:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26400 states. [2023-11-24 23:56:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26400 to 25328. [2023-11-24 23:56:24,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25328 states, 18381 states have (on average 1.609760078341766) internal successors, (29589), 19665 states have internal predecessors, (29589), 5276 states have call successors, (5276), 1319 states have call predecessors, (5276), 1670 states have return successors, (8905), 4769 states have call predecessors, (8905), 5271 states have call successors, (8905) [2023-11-24 23:56:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25328 states to 25328 states and 43770 transitions. [2023-11-24 23:56:24,572 INFO L78 Accepts]: Start accepts. Automaton has 25328 states and 43770 transitions. Word has length 98 [2023-11-24 23:56:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:24,574 INFO L495 AbstractCegarLoop]: Abstraction has 25328 states and 43770 transitions. [2023-11-24 23:56:24,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:56:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 25328 states and 43770 transitions. [2023-11-24 23:56:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-24 23:56:24,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:24,584 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] [2023-11-24 23:56:24,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:56:24,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:24,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash 934721341, now seen corresponding path program 1 times [2023-11-24 23:56:24,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:24,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769031263] [2023-11-24 23:56:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:24,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-24 23:56:24,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:24,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769031263] [2023-11-24 23:56:24,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769031263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:24,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:24,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:56:24,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295925580] [2023-11-24 23:56:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:24,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:56:24,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:56:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:56:24,829 INFO L87 Difference]: Start difference. First operand 25328 states and 43770 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23)