./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire --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 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:51,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:51,949 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:33:51,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:51,959 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:52,003 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:52,005 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:52,006 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:52,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:52,013 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:52,013 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:52,015 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:52,016 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:52,018 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:52,018 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:52,019 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:52,019 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:52,020 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:52,020 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:52,021 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:52,022 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:52,023 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:52,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:52,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:52,025 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:33:52,026 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:52,026 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:33:52,027 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:52,027 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:52,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:52,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:52,030 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:33:52,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:52,031 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:52,031 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:52,031 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:52,032 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:52,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:52,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:52,033 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:52,033 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:52,034 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:52,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:52,034 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:52,035 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:52,036 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:52,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:52,036 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_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 [2023-11-23 20:33:52,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:52,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:52,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:52,411 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:52,411 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:52,413 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2023-11-23 20:33:55,881 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:56,290 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:56,293 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2023-11-23 20:33:56,329 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/data/e2b088063/fbb45e42470f40a98e86cc8227771f98/FLAG52afd99fe [2023-11-23 20:33:56,346 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/data/e2b088063/fbb45e42470f40a98e86cc8227771f98 [2023-11-23 20:33:56,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:56,354 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:56,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:56,357 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:56,365 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:56,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:56" (1/1) ... [2023-11-23 20:33:56,366 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa8e7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:56, skipping insertion in model container [2023-11-23 20:33:56,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:56" (1/1) ... [2023-11-23 20:33:56,468 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:56,771 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_facd82bd-e4da-4f1d-843c-67b45db17a6b/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2023-11-23 20:33:57,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:57,101 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:57,117 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2023-11-23 20:33:57,137 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [414] [2023-11-23 20:33:57,138 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [601] [2023-11-23 20:33:57,138 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [615] [2023-11-23 20:33:57,138 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [714] [2023-11-23 20:33:57,139 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [723] [2023-11-23 20:33:57,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2279] [2023-11-23 20:33:57,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2632] [2023-11-23 20:33:57,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3293] [2023-11-23 20:33:57,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3411] [2023-11-23 20:33:57,243 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_facd82bd-e4da-4f1d-843c-67b45db17a6b/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2023-11-23 20:33:57,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:57,428 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:57,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57 WrapperNode [2023-11-23 20:33:57,428 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:57,430 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:57,430 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:57,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:57,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,523 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,628 INFO L138 Inliner]: procedures = 95, calls = 342, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1162 [2023-11-23 20:33:57,628 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:57,629 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:57,629 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:57,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:57,640 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,648 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,648 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,735 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,766 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:57,778 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:57,778 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:57,778 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:57,779 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (1/1) ... [2023-11-23 20:33:57,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:57,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:57,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:57,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:57,869 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-23 20:33:57,869 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-23 20:33:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 20:33:57,870 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 20:33:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 20:33:57,871 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 20:33:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-23 20:33:57,871 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-23 20:33:57,872 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 20:33:57,872 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 20:33:57,872 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 20:33:57,872 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 20:33:57,874 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 20:33:57,874 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 20:33:57,874 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:33:57,874 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:33:57,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:57,878 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-23 20:33:57,879 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-23 20:33:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 20:33:57,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 20:33:57,879 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 20:33:57,880 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 20:33:57,880 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 20:33:57,880 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 20:33:57,881 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 20:33:57,881 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 20:33:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-23 20:33:57,882 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-23 20:33:57,882 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 20:33:57,882 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 20:33:57,883 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-23 20:33:57,883 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-23 20:33:57,883 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 20:33:57,883 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 20:33:57,884 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 20:33:57,884 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 20:33:57,884 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 20:33:57,884 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 20:33:57,885 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 20:33:57,885 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 20:33:57,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:57,885 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 20:33:57,885 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 20:33:57,886 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 20:33:57,886 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 20:33:57,886 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 20:33:57,886 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 20:33:57,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:57,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:57,888 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 20:33:57,889 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 20:33:58,101 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:58,105 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:59,427 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:34:00,523 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:34:00,524 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:34:00,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:00 BoogieIcfgContainer [2023-11-23 20:34:00,526 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:34:00,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:34:00,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:34:00,533 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:34:00,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:56" (1/3) ... [2023-11-23 20:34:00,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abce821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:00, skipping insertion in model container [2023-11-23 20:34:00,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:57" (2/3) ... [2023-11-23 20:34:00,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abce821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:00, skipping insertion in model container [2023-11-23 20:34:00,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:00" (3/3) ... [2023-11-23 20:34:00,539 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product27.cil.c [2023-11-23 20:34:00,562 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:34:00,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:34:00,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:34:00,664 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;@8a21dc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:34:00,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:34:00,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-23 20:34:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-23 20:34:00,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:00,697 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:00,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:00,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:00,703 INFO L85 PathProgramCache]: Analyzing trace with hash 177466903, now seen corresponding path program 1 times [2023-11-23 20:34:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646817341] [2023-11-23 20:34:00,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:00,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:34:01,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:01,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646817341] [2023-11-23 20:34:01,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646817341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:01,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:01,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:34:01,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638704596] [2023-11-23 20:34:01,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:01,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:34:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:34:01,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:34:01,331 INFO L87 Difference]: Start difference. First operand has 374 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 96 states have call successors, (96), 24 states have call predecessors, (96), 24 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-23 20:34:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:01,503 INFO L93 Difference]: Finished difference Result 392 states and 621 transitions. [2023-11-23 20:34:01,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:34:01,506 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2023-11-23 20:34:01,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:01,534 INFO L225 Difference]: With dead ends: 392 [2023-11-23 20:34:01,534 INFO L226 Difference]: Without dead ends: 370 [2023-11-23 20:34:01,539 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 [2023-11-23 20:34:01,543 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:01,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 551 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2023-11-23 20:34:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2023-11-23 20:34:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 250 states have (on average 1.584) internal successors, (396), 269 states have internal predecessors, (396), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-23 20:34:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 583 transitions. [2023-11-23 20:34:01,658 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 583 transitions. Word has length 77 [2023-11-23 20:34:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:01,660 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 583 transitions. [2023-11-23 20:34:01,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-23 20:34:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 583 transitions. [2023-11-23 20:34:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-23 20:34:01,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:01,668 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] [2023-11-23 20:34:01,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:34:01,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:01,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1090242726, now seen corresponding path program 1 times [2023-11-23 20:34:01,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:01,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407694719] [2023-11-23 20:34:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:01,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:34:02,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:02,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407694719] [2023-11-23 20:34:02,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407694719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:02,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:02,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:34:02,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208865906] [2023-11-23 20:34:02,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:02,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:34:02,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:34:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:34:02,440 INFO L87 Difference]: Start difference. First operand 370 states and 583 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) [2023-11-23 20:34:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:05,258 INFO L93 Difference]: Finished difference Result 1141 states and 1828 transitions. [2023-11-23 20:34:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:34:05,265 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 [2023-11-23 20:34:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:05,280 INFO L225 Difference]: With dead ends: 1141 [2023-11-23 20:34:05,280 INFO L226 Difference]: Without dead ends: 787 [2023-11-23 20:34:05,292 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 [2023-11-23 20:34:05,295 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1146 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 2604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:05,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 1603 Invalid, 2604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-23 20:34:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2023-11-23 20:34:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 738. [2023-11-23 20:34:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 507 states have (on average 1.5956607495069033) internal successors, (809), 540 states have internal predecessors, (809), 186 states have call successors, (186), 44 states have call predecessors, (186), 44 states have return successors, (187), 178 states have call predecessors, (187), 181 states have call successors, (187) [2023-11-23 20:34:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1182 transitions. [2023-11-23 20:34:05,387 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1182 transitions. Word has length 78 [2023-11-23 20:34:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:05,388 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1182 transitions. [2023-11-23 20:34:05,388 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) [2023-11-23 20:34:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1182 transitions. [2023-11-23 20:34:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-23 20:34:05,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:05,392 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] [2023-11-23 20:34:05,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:34:05,393 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:05,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash -144048726, now seen corresponding path program 1 times [2023-11-23 20:34:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:05,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132689403] [2023-11-23 20:34:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:05,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:05,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:34:05,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:05,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132689403] [2023-11-23 20:34:05,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132689403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:05,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:05,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:34:05,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988164940] [2023-11-23 20:34:05,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:05,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:34:05,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:05,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:34:05,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:34:05,753 INFO L87 Difference]: Start difference. First operand 738 states and 1182 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) [2023-11-23 20:34:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:06,402 INFO L93 Difference]: Finished difference Result 809 states and 1294 transitions. [2023-11-23 20:34:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:06,403 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 [2023-11-23 20:34:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:06,411 INFO L225 Difference]: With dead ends: 809 [2023-11-23 20:34:06,411 INFO L226 Difference]: Without dead ends: 794 [2023-11-23 20:34:06,412 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 [2023-11-23 20:34:06,413 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 677 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:06,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1801 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:34:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-11-23 20:34:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 742. [2023-11-23 20:34:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 511 states have (on average 1.5909980430528377) internal successors, (813), 544 states have internal predecessors, (813), 186 states have call successors, (186), 44 states have call predecessors, (186), 44 states have return successors, (187), 178 states have call predecessors, (187), 181 states have call successors, (187) [2023-11-23 20:34:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1186 transitions. [2023-11-23 20:34:06,477 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1186 transitions. Word has length 82 [2023-11-23 20:34:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:06,478 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 1186 transitions. [2023-11-23 20:34:06,478 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) [2023-11-23 20:34:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1186 transitions. [2023-11-23 20:34:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 20:34:06,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:06,482 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] [2023-11-23 20:34:06,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:34:06,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:06,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:06,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1680413773, now seen corresponding path program 1 times [2023-11-23 20:34:06,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:06,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791625906] [2023-11-23 20:34:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:34:06,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:06,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791625906] [2023-11-23 20:34:06,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791625906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:06,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:06,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:34:06,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133576454] [2023-11-23 20:34:06,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:06,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:34:06,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:34:06,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:34:06,822 INFO L87 Difference]: Start difference. First operand 742 states and 1186 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 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) [2023-11-23 20:34:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:07,018 INFO L93 Difference]: Finished difference Result 761 states and 1210 transitions. [2023-11-23 20:34:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:34:07,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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 [2023-11-23 20:34:07,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:07,027 INFO L225 Difference]: With dead ends: 761 [2023-11-23 20:34:07,027 INFO L226 Difference]: Without dead ends: 746 [2023-11-23 20:34:07,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:34:07,029 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 41 mSDsluCounter, 2152 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2702 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:07,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2702 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:34:07,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-11-23 20:34:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 742. [2023-11-23 20:34:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 511 states have (on average 1.5870841487279843) internal successors, (811), 544 states have internal predecessors, (811), 186 states have call successors, (186), 44 states have call predecessors, (186), 44 states have return successors, (187), 178 states have call predecessors, (187), 181 states have call successors, (187) [2023-11-23 20:34:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1184 transitions. [2023-11-23 20:34:07,094 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1184 transitions. Word has length 87 [2023-11-23 20:34:07,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:07,095 INFO L495 AbstractCegarLoop]: Abstraction has 742 states and 1184 transitions. [2023-11-23 20:34:07,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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) [2023-11-23 20:34:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1184 transitions. [2023-11-23 20:34:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-23 20:34:07,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:07,099 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] [2023-11-23 20:34:07,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:34:07,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:07,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1404789972, now seen corresponding path program 1 times [2023-11-23 20:34:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:07,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813994680] [2023-11-23 20:34:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:07,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:34:07,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:07,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813994680] [2023-11-23 20:34:07,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813994680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:07,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:07,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:07,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113247457] [2023-11-23 20:34:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:07,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:07,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:07,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:07,402 INFO L87 Difference]: Start difference. First operand 742 states and 1184 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) [2023-11-23 20:34:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:09,079 INFO L93 Difference]: Finished difference Result 2383 states and 3869 transitions. [2023-11-23 20:34:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:09,080 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 [2023-11-23 20:34:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:09,100 INFO L225 Difference]: With dead ends: 2383 [2023-11-23 20:34:09,101 INFO L226 Difference]: Without dead ends: 1657 [2023-11-23 20:34:09,108 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 [2023-11-23 20:34:09,112 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1156 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:09,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 676 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 20:34:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2023-11-23 20:34:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1491. [2023-11-23 20:34:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1049 states have (on average 1.5986653956148713) internal successors, (1677), 1112 states have internal predecessors, (1677), 357 states have call successors, (357), 79 states have call predecessors, (357), 84 states have return successors, (375), 335 states have call predecessors, (375), 352 states have call successors, (375) [2023-11-23 20:34:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2409 transitions. [2023-11-23 20:34:09,301 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2409 transitions. Word has length 94 [2023-11-23 20:34:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:09,301 INFO L495 AbstractCegarLoop]: Abstraction has 1491 states and 2409 transitions. [2023-11-23 20:34:09,302 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) [2023-11-23 20:34:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2409 transitions. [2023-11-23 20:34:09,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-23 20:34:09,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:09,305 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] [2023-11-23 20:34:09,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:34:09,306 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:09,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:09,306 INFO L85 PathProgramCache]: Analyzing trace with hash 598677781, now seen corresponding path program 1 times [2023-11-23 20:34:09,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:09,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861375699] [2023-11-23 20:34:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:09,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:34:09,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:09,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861375699] [2023-11-23 20:34:09,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861375699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:09,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:09,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:09,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987899672] [2023-11-23 20:34:09,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:09,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:09,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:09,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:09,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:09,643 INFO L87 Difference]: Start difference. First operand 1491 states and 2409 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) [2023-11-23 20:34:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:11,424 INFO L93 Difference]: Finished difference Result 4562 states and 7487 transitions. [2023-11-23 20:34:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:11,425 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 [2023-11-23 20:34:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:11,460 INFO L225 Difference]: With dead ends: 4562 [2023-11-23 20:34:11,460 INFO L226 Difference]: Without dead ends: 3090 [2023-11-23 20:34:11,469 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 [2023-11-23 20:34:11,471 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1146 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:11,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 684 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 20:34:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2023-11-23 20:34:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2877. [2023-11-23 20:34:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2047 states have (on average 1.6062530532486565) internal successors, (3288), 2177 states have internal predecessors, (3288), 662 states have call successors, (662), 149 states have call predecessors, (662), 167 states have return successors, (740), 612 states have call predecessors, (740), 657 states have call successors, (740) [2023-11-23 20:34:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 4690 transitions. [2023-11-23 20:34:11,766 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 4690 transitions. Word has length 95 [2023-11-23 20:34:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:11,767 INFO L495 AbstractCegarLoop]: Abstraction has 2877 states and 4690 transitions. [2023-11-23 20:34:11,768 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) [2023-11-23 20:34:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 4690 transitions. [2023-11-23 20:34:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-23 20:34:11,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:11,771 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] [2023-11-23 20:34:11,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:34:11,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:11,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:11,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1379007542, now seen corresponding path program 1 times [2023-11-23 20:34:11,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:11,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394853847] [2023-11-23 20:34:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:11,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:34:12,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394853847] [2023-11-23 20:34:12,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394853847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:12,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:12,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:12,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702521489] [2023-11-23 20:34:12,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:12,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:12,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:12,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:12,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:12,045 INFO L87 Difference]: Start difference. First operand 2877 states and 4690 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) [2023-11-23 20:34:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:13,890 INFO L93 Difference]: Finished difference Result 8762 states and 14599 transitions. [2023-11-23 20:34:13,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:13,891 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 [2023-11-23 20:34:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:13,943 INFO L225 Difference]: With dead ends: 8762 [2023-11-23 20:34:13,943 INFO L226 Difference]: Without dead ends: 5910 [2023-11-23 20:34:13,962 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 [2023-11-23 20:34:13,965 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1133 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:13,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1203 Valid, 697 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 20:34:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2023-11-23 20:34:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 5594. [2023-11-23 20:34:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5594 states, 3998 states have (on average 1.6068034017008503) internal successors, (6424), 4268 states have internal predecessors, (6424), 1256 states have call successors, (1256), 289 states have call predecessors, (1256), 339 states have return successors, (1546), 1150 states have call predecessors, (1546), 1251 states have call successors, (1546) [2023-11-23 20:34:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5594 states to 5594 states and 9226 transitions. [2023-11-23 20:34:14,650 INFO L78 Accepts]: Start accepts. Automaton has 5594 states and 9226 transitions. Word has length 96 [2023-11-23 20:34:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:14,650 INFO L495 AbstractCegarLoop]: Abstraction has 5594 states and 9226 transitions. [2023-11-23 20:34:14,651 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) [2023-11-23 20:34:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5594 states and 9226 transitions. [2023-11-23 20:34:14,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-23 20:34:14,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:14,655 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] [2023-11-23 20:34:14,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:34:14,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:14,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash -200569737, now seen corresponding path program 1 times [2023-11-23 20:34:14,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:14,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375492312] [2023-11-23 20:34:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:14,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:34:14,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375492312] [2023-11-23 20:34:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375492312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:14,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:14,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749884889] [2023-11-23 20:34:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:14,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:14,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:14,910 INFO L87 Difference]: Start difference. First operand 5594 states and 9226 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) [2023-11-23 20:34:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:17,654 INFO L93 Difference]: Finished difference Result 17015 states and 29110 transitions. [2023-11-23 20:34:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:17,655 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 [2023-11-23 20:34:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:17,773 INFO L225 Difference]: With dead ends: 17015 [2023-11-23 20:34:17,773 INFO L226 Difference]: Without dead ends: 11458 [2023-11-23 20:34:17,814 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 [2023-11-23 20:34:17,816 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1120 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:17,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 707 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 20:34:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11458 states. [2023-11-23 20:34:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11458 to 10927. [2023-11-23 20:34:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10927 states, 7817 states have (on average 1.603684277855955) internal successors, (12536), 8379 states have internal predecessors, (12536), 2414 states have call successors, (2414), 569 states have call predecessors, (2414), 695 states have return successors, (3456), 2196 states have call predecessors, (3456), 2409 states have call successors, (3456) [2023-11-23 20:34:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10927 states to 10927 states and 18406 transitions. [2023-11-23 20:34:19,216 INFO L78 Accepts]: Start accepts. Automaton has 10927 states and 18406 transitions. Word has length 97 [2023-11-23 20:34:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:19,217 INFO L495 AbstractCegarLoop]: Abstraction has 10927 states and 18406 transitions. [2023-11-23 20:34:19,217 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) [2023-11-23 20:34:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10927 states and 18406 transitions. [2023-11-23 20:34:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-23 20:34:19,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:19,221 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] [2023-11-23 20:34:19,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:34:19,222 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:19,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1922821224, now seen corresponding path program 1 times [2023-11-23 20:34:19,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:19,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347810482] [2023-11-23 20:34:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:19,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:34:19,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:19,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347810482] [2023-11-23 20:34:19,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347810482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:19,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:19,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923408180] [2023-11-23 20:34:19,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:19,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:19,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:19,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:19,489 INFO L87 Difference]: Start difference. First operand 10927 states and 18406 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) [2023-11-23 20:34:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:22,968 INFO L93 Difference]: Finished difference Result 33312 states and 59838 transitions. [2023-11-23 20:34:22,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:22,969 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 [2023-11-23 20:34:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:23,129 INFO L225 Difference]: With dead ends: 33312 [2023-11-23 20:34:23,130 INFO L226 Difference]: Without dead ends: 22436 [2023-11-23 20:34:23,187 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 [2023-11-23 20:34:23,192 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1112 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:23,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1180 Valid, 722 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 20:34:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22436 states. [2023-11-23 20:34:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22436 to 21364. [2023-11-23 20:34:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21364 states, 15311 states have (on average 1.60244268826334) internal successors, (24535), 16435 states have internal predecessors, (24535), 4670 states have call successors, (4670), 1127 states have call predecessors, (4670), 1382 states have return successors, (8107), 4227 states have call predecessors, (8107), 4665 states have call successors, (8107) [2023-11-23 20:34:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21364 states to 21364 states and 37312 transitions. [2023-11-23 20:34:26,021 INFO L78 Accepts]: Start accepts. Automaton has 21364 states and 37312 transitions. Word has length 98 [2023-11-23 20:34:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:26,021 INFO L495 AbstractCegarLoop]: Abstraction has 21364 states and 37312 transitions. [2023-11-23 20:34:26,022 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) [2023-11-23 20:34:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 21364 states and 37312 transitions. [2023-11-23 20:34:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 20:34:26,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:26,035 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:26,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:34:26,036 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:26,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash -332052549, now seen corresponding path program 1 times [2023-11-23 20:34:26,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:26,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572473775] [2023-11-23 20:34:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-23 20:34:26,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:26,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572473775] [2023-11-23 20:34:26,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572473775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:26,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:26,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:26,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494007536] [2023-11-23 20:34:26,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:26,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:26,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:26,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:26,354 INFO L87 Difference]: Start difference. First operand 21364 states and 37312 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 20:34:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:28,412 INFO L93 Difference]: Finished difference Result 45987 states and 83603 transitions. [2023-11-23 20:34:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:28,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 146 [2023-11-23 20:34:28,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:28,571 INFO L225 Difference]: With dead ends: 45987 [2023-11-23 20:34:28,571 INFO L226 Difference]: Without dead ends: 24640 [2023-11-23 20:34:28,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:34:28,663 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 114 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:28,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1734 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:34:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24640 states. [2023-11-23 20:34:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24640 to 21604. [2023-11-23 20:34:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21604 states, 15534 states have (on average 1.5968198789751513) internal successors, (24805), 16642 states have internal predecessors, (24805), 4687 states have call successors, (4687), 1127 states have call predecessors, (4687), 1382 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2023-11-23 20:34:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21604 states to 21604 states and 37616 transitions. [2023-11-23 20:34:31,082 INFO L78 Accepts]: Start accepts. Automaton has 21604 states and 37616 transitions. Word has length 146 [2023-11-23 20:34:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:31,082 INFO L495 AbstractCegarLoop]: Abstraction has 21604 states and 37616 transitions. [2023-11-23 20:34:31,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 20:34:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 21604 states and 37616 transitions. [2023-11-23 20:34:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-23 20:34:31,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:31,092 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:31,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:34:31,092 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:31,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:31,093 INFO L85 PathProgramCache]: Analyzing trace with hash -322052608, now seen corresponding path program 1 times [2023-11-23 20:34:31,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:31,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801585219] [2023-11-23 20:34:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:31,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-23 20:34:31,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:31,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801585219] [2023-11-23 20:34:31,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801585219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:31,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115039424] [2023-11-23 20:34:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:31,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:31,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:31,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:31,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:34:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:32,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:34:32,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-23 20:34:32,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:34:32,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115039424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:32,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:34:32,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-23 20:34:32,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194964152] [2023-11-23 20:34:32,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:32,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:32,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:32,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:34:32,227 INFO L87 Difference]: Start difference. First operand 21604 states and 37616 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 20:34:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:33,990 INFO L93 Difference]: Finished difference Result 45687 states and 82818 transitions. [2023-11-23 20:34:33,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:34:33,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 149 [2023-11-23 20:34:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:34,179 INFO L225 Difference]: With dead ends: 45687 [2023-11-23 20:34:34,179 INFO L226 Difference]: Without dead ends: 24100 [2023-11-23 20:34:34,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:34:34,279 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 213 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:34,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1419 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:34:34,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24100 states. [2023-11-23 20:34:36,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24100 to 24100. [2023-11-23 20:34:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24100 states, 17966 states have (on average 1.6407102304352665) internal successors, (29477), 19074 states have internal predecessors, (29477), 4687 states have call successors, (4687), 1191 states have call predecessors, (4687), 1446 states have return successors, (8124), 4244 states have call predecessors, (8124), 4682 states have call successors, (8124) [2023-11-23 20:34:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24100 states to 24100 states and 42288 transitions. [2023-11-23 20:34:36,468 INFO L78 Accepts]: Start accepts. Automaton has 24100 states and 42288 transitions. Word has length 149 [2023-11-23 20:34:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:36,469 INFO L495 AbstractCegarLoop]: Abstraction has 24100 states and 42288 transitions. [2023-11-23 20:34:36,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 20:34:36,470 INFO L276 IsEmpty]: Start isEmpty. Operand 24100 states and 42288 transitions. [2023-11-23 20:34:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-23 20:34:36,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:36,480 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:36,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:36,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_facd82bd-e4da-4f1d-843c-67b45db17a6b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:36,697 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:36,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:36,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1251073654, now seen corresponding path program 1 times [2023-11-23 20:34:36,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:36,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108311599] [2023-11-23 20:34:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:36,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat