./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ --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 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:17:49,287 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:17:49,408 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:17:49,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:17:49,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:17:49,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:17:49,443 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:17:49,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:17:49,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:17:49,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:17:49,447 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:17:49,447 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:17:49,448 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:17:49,449 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:17:49,449 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:17:49,450 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:17:49,451 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:17:49,451 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:17:49,452 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:17:49,453 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:17:49,453 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:17:49,454 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:17:49,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:17:49,455 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:17:49,456 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:17:49,456 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:17:49,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:17:49,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:17:49,458 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:17:49,458 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:17:49,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:17:49,459 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:17:49,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:17:49,460 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:17:49,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:17:49,461 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:17:49,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:49,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:17:49,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:17:49,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:17:49,464 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:17:49,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:17:49,465 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:17:49,466 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:17:49,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:17:49,467 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_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2023-11-19 05:17:49,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:17:49,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:17:49,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:17:49,745 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:17:49,746 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:17:49,747 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2023-11-19 05:17:53,411 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:17:54,126 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:17:54,127 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2023-11-19 05:17:54,156 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/data/181954c7f/46d11260eebd4c1388b68e01d3cb188b/FLAG0066c65de [2023-11-19 05:17:54,174 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/data/181954c7f/46d11260eebd4c1388b68e01d3cb188b [2023-11-19 05:17:54,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:17:54,179 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:17:54,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:54,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:17:54,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:17:54,189 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:54" (1/1) ... [2023-11-19 05:17:54,191 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45912e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:54, skipping insertion in model container [2023-11-19 05:17:54,191 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:54" (1/1) ... [2023-11-19 05:17:54,294 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:17:54,774 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_6aa0f136-e3c7-41a2-962a-674e5c074d68/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2023-11-19 05:17:55,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:55,187 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:17:55,201 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2023-11-19 05:17:55,203 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [414] [2023-11-19 05:17:55,204 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [452] [2023-11-19 05:17:55,204 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification9_spec.i","") [461] [2023-11-19 05:17:55,204 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [626] [2023-11-19 05:17:55,205 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [640] [2023-11-19 05:17:55,205 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [739] [2023-11-19 05:17:55,206 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [859] [2023-11-19 05:17:55,206 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2444] [2023-11-19 05:17:55,206 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [3105] [2023-11-19 05:17:55,269 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_6aa0f136-e3c7-41a2-962a-674e5c074d68/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2023-11-19 05:17:55,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:55,394 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:17:55,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55 WrapperNode [2023-11-19 05:17:55,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:55,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:55,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:17:55,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:17:55,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,541 INFO L138 Inliner]: procedures = 95, calls = 344, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 872 [2023-11-19 05:17:55,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:55,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:17:55,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:17:55,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:17:55,567 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,596 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,626 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,646 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,653 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,678 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:17:55,708 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:17:55,708 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:17:55,708 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:17:55,709 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (1/1) ... [2023-11-19 05:17:55,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:55,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:55,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:17:55,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6aa0f136-e3c7-41a2-962a-674e5c074d68/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:17:55,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:17:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:17:55,806 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:17:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 05:17:55,806 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 05:17:55,806 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:17:55,806 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:17:55,807 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:17:55,807 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:17:55,807 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:17:55,807 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:17:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:17:55,808 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 05:17:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:17:55,808 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:17:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:17:55,808 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:17:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 05:17:55,810 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 05:17:55,810 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:17:55,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:17:55,810 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:17:55,811 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:17:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:17:55,811 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:17:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:17:55,811 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:17:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 05:17:55,812 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 05:17:55,812 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:17:55,812 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:17:55,812 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:17:55,812 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:17:55,812 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:17:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:17:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:17:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:17:55,813 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:17:55,813 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:17:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-11-19 05:17:55,814 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-11-19 05:17:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:17:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 05:17:55,814 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 05:17:55,814 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:17:55,814 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:17:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:17:55,815 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:17:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:17:55,815 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:17:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2023-11-19 05:17:55,815 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2023-11-19 05:17:55,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:17:55,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:17:55,816 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:17:55,816 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:17:55,995 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:17:55,998 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:17:57,558 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:17:58,797 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:17:58,798 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:17:58,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:58 BoogieIcfgContainer [2023-11-19 05:17:58,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:17:58,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:17:58,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:17:58,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:17:58,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:17:54" (1/3) ... [2023-11-19 05:17:58,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ab5c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:58, skipping insertion in model container [2023-11-19 05:17:58,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:55" (2/3) ... [2023-11-19 05:17:58,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ab5c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:58, skipping insertion in model container [2023-11-19 05:17:58,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:58" (3/3) ... [2023-11-19 05:17:58,831 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product30.cil.c [2023-11-19 05:17:58,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:17:58,856 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:17:58,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:17:58,964 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;@2582c589, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:17:58,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:17:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-19 05:17:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:17:59,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:59,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:59,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:59,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash -554525065, now seen corresponding path program 1 times [2023-11-19 05:17:59,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:59,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103022669] [2023-11-19 05:17:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:59,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:59,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103022669] [2023-11-19 05:17:59,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103022669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:59,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:59,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:17:59,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384837880] [2023-11-19 05:17:59,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:59,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:17:59,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:17:59,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:17:59,669 INFO L87 Difference]: Start difference. First operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:17:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:59,902 INFO L93 Difference]: Finished difference Result 396 states and 622 transitions. [2023-11-19 05:17:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:17:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2023-11-19 05:17:59,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:59,935 INFO L225 Difference]: With dead ends: 396 [2023-11-19 05:17:59,935 INFO L226 Difference]: Without dead ends: 374 [2023-11-19 05:17:59,940 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 [2023-11-19 05:17:59,944 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:59,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 549 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-19 05:18:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2023-11-19 05:18:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 252 states have (on average 1.5753968253968254) internal successors, (397), 273 states have internal predecessors, (397), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-19 05:18:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 584 transitions. [2023-11-19 05:18:00,062 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 584 transitions. Word has length 43 [2023-11-19 05:18:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:00,064 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 584 transitions. [2023-11-19 05:18:00,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 05:18:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 584 transitions. [2023-11-19 05:18:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 05:18:00,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:00,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:00,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:18:00,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:00,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash 335988881, now seen corresponding path program 1 times [2023-11-19 05:18:00,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010693889] [2023-11-19 05:18:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:00,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:00,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010693889] [2023-11-19 05:18:00,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010693889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:00,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:00,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:18:00,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656317477] [2023-11-19 05:18:00,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:00,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:18:00,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:18:00,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:00,816 INFO L87 Difference]: Start difference. First operand 374 states and 584 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-19 05:18:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:03,186 INFO L93 Difference]: Finished difference Result 1210 states and 1926 transitions. [2023-11-19 05:18:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:18:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2023-11-19 05:18:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:03,198 INFO L225 Difference]: With dead ends: 1210 [2023-11-19 05:18:03,198 INFO L226 Difference]: Without dead ends: 852 [2023-11-19 05:18:03,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:18:03,213 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1186 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1250 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:03,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1250 Valid, 945 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 05:18:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2023-11-19 05:18:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 755. [2023-11-19 05:18:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 528 states have (on average 1.5909090909090908) internal successors, (840), 558 states have internal predecessors, (840), 179 states have call successors, (179), 46 states have call predecessors, (179), 47 states have return successors, (181), 163 states have call predecessors, (181), 174 states have call successors, (181) [2023-11-19 05:18:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1200 transitions. [2023-11-19 05:18:03,323 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1200 transitions. Word has length 44 [2023-11-19 05:18:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:03,324 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1200 transitions. [2023-11-19 05:18:03,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-19 05:18:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1200 transitions. [2023-11-19 05:18:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-19 05:18:03,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:03,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:03,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:18:03,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:03,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:03,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1283308087, now seen corresponding path program 1 times [2023-11-19 05:18:03,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:03,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474311443] [2023-11-19 05:18:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:03,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:03,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:03,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474311443] [2023-11-19 05:18:03,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474311443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:03,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:03,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:18:03,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707095133] [2023-11-19 05:18:03,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:03,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:18:03,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:18:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:18:03,849 INFO L87 Difference]: Start difference. First operand 755 states and 1200 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 05:18:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:04,239 INFO L93 Difference]: Finished difference Result 1684 states and 2718 transitions. [2023-11-19 05:18:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:18:04,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2023-11-19 05:18:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:04,249 INFO L225 Difference]: With dead ends: 1684 [2023-11-19 05:18:04,250 INFO L226 Difference]: Without dead ends: 946 [2023-11-19 05:18:04,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:18:04,262 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 177 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:04,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2193 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:18:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-19 05:18:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 761. [2023-11-19 05:18:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 534 states have (on average 1.5842696629213484) internal successors, (846), 564 states have internal predecessors, (846), 179 states have call successors, (179), 46 states have call predecessors, (179), 47 states have return successors, (181), 163 states have call predecessors, (181), 174 states have call successors, (181) [2023-11-19 05:18:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1206 transitions. [2023-11-19 05:18:04,354 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1206 transitions. Word has length 76 [2023-11-19 05:18:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:04,357 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 1206 transitions. [2023-11-19 05:18:04,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 05:18:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1206 transitions. [2023-11-19 05:18:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-19 05:18:04,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:04,364 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:18:04,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:18:04,364 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:04,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1473176253, now seen corresponding path program 1 times [2023-11-19 05:18:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550573324] [2023-11-19 05:18:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:05,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:05,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550573324] [2023-11-19 05:18:05,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550573324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:05,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:05,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 05:18:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407475374] [2023-11-19 05:18:05,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:18:05,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:18:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:18:05,071 INFO L87 Difference]: Start difference. First operand 761 states and 1206 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-19 05:18:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:09,461 INFO L93 Difference]: Finished difference Result 2607 states and 4176 transitions. [2023-11-19 05:18:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-19 05:18:09,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 78 [2023-11-19 05:18:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:09,493 INFO L225 Difference]: With dead ends: 2607 [2023-11-19 05:18:09,493 INFO L226 Difference]: Without dead ends: 1863 [2023-11-19 05:18:09,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-19 05:18:09,512 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 1717 mSDsluCounter, 1915 mSDsCounter, 0 mSdLazyCounter, 3519 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1777 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 4071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 3519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:09,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1777 Valid, 2279 Invalid, 4071 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [552 Valid, 3519 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-19 05:18:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2023-11-19 05:18:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1780. [2023-11-19 05:18:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1279 states have (on average 1.5957779515246286) internal successors, (2041), 1331 states have internal predecessors, (2041), 388 states have call successors, (388), 97 states have call predecessors, (388), 112 states have return successors, (427), 375 states have call predecessors, (427), 383 states have call successors, (427) [2023-11-19 05:18:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2856 transitions. [2023-11-19 05:18:09,715 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2856 transitions. Word has length 78 [2023-11-19 05:18:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:09,717 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 2856 transitions. [2023-11-19 05:18:09,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-19 05:18:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2856 transitions. [2023-11-19 05:18:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-19 05:18:09,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:09,724 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:18:09,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:18:09,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:09,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:09,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1456196714, now seen corresponding path program 1 times [2023-11-19 05:18:09,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:09,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991361433] [2023-11-19 05:18:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:09,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:10,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:10,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991361433] [2023-11-19 05:18:10,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991361433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:10,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:10,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:18:10,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034324327] [2023-11-19 05:18:10,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:10,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:18:10,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:10,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:18:10,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:18:10,277 INFO L87 Difference]: Start difference. First operand 1780 states and 2856 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:18:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:10,743 INFO L93 Difference]: Finished difference Result 2894 states and 4658 transitions. [2023-11-19 05:18:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:18:10,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2023-11-19 05:18:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:10,765 INFO L225 Difference]: With dead ends: 2894 [2023-11-19 05:18:10,765 INFO L226 Difference]: Without dead ends: 1850 [2023-11-19 05:18:10,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:18:10,777 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 7 mSDsluCounter, 2704 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3252 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:10,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3252 Invalid, 263 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:18:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2023-11-19 05:18:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1822. [2023-11-19 05:18:10,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1309 states have (on average 1.5821237585943468) internal successors, (2071), 1361 states have internal predecessors, (2071), 388 states have call successors, (388), 97 states have call predecessors, (388), 124 states have return successors, (457), 387 states have call predecessors, (457), 383 states have call successors, (457) [2023-11-19 05:18:10,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2916 transitions. [2023-11-19 05:18:10,964 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2916 transitions. Word has length 83 [2023-11-19 05:18:10,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:10,965 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2916 transitions. [2023-11-19 05:18:10,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:18:10,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2916 transitions. [2023-11-19 05:18:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-19 05:18:10,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:10,970 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:18:10,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:18:10,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:10,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1337783946, now seen corresponding path program 1 times [2023-11-19 05:18:10,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:10,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109976037] [2023-11-19 05:18:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:10,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:11,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109976037] [2023-11-19 05:18:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109976037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:11,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:11,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:18:11,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891432829] [2023-11-19 05:18:11,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:11,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:18:11,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:18:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:18:11,398 INFO L87 Difference]: Start difference. First operand 1822 states and 2916 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:18:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:11,811 INFO L93 Difference]: Finished difference Result 2952 states and 4734 transitions. [2023-11-19 05:18:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:18:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2023-11-19 05:18:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:11,842 INFO L225 Difference]: With dead ends: 2952 [2023-11-19 05:18:11,842 INFO L226 Difference]: Without dead ends: 1880 [2023-11-19 05:18:11,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:18:11,852 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 6 mSDsluCounter, 2719 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:11,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3271 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:18:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2023-11-19 05:18:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1828. [2023-11-19 05:18:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1315 states have (on average 1.579467680608365) internal successors, (2077), 1361 states have internal predecessors, (2077), 388 states have call successors, (388), 97 states have call predecessors, (388), 124 states have return successors, (457), 393 states have call predecessors, (457), 383 states have call successors, (457) [2023-11-19 05:18:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2922 transitions. [2023-11-19 05:18:12,025 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2922 transitions. Word has length 83 [2023-11-19 05:18:12,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:12,027 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 2922 transitions. [2023-11-19 05:18:12,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:18:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2922 transitions. [2023-11-19 05:18:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-19 05:18:12,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:12,035 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:18:12,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:18:12,035 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:12,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:12,036 INFO L85 PathProgramCache]: Analyzing trace with hash -308716848, now seen corresponding path program 1 times [2023-11-19 05:18:12,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:12,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907394727] [2023-11-19 05:18:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:12,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:12,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:12,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907394727] [2023-11-19 05:18:12,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907394727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:12,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:12,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 05:18:12,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104264164] [2023-11-19 05:18:12,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:12,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:18:12,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:12,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:18:12,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:18:12,651 INFO L87 Difference]: Start difference. First operand 1828 states and 2922 transitions. Second operand has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 05:18:17,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:17,162 INFO L93 Difference]: Finished difference Result 4720 states and 7547 transitions. [2023-11-19 05:18:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 05:18:17,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 81 [2023-11-19 05:18:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:17,187 INFO L225 Difference]: With dead ends: 4720 [2023-11-19 05:18:17,188 INFO L226 Difference]: Without dead ends: 2908 [2023-11-19 05:18:17,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-19 05:18:17,203 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 950 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 5049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 4785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:17,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 2476 Invalid, 5049 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [264 Valid, 4785 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-19 05:18:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2023-11-19 05:18:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2803. [2023-11-19 05:18:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2019 states have (on average 1.5725606736007924) internal successors, (3175), 2079 states have internal predecessors, (3175), 589 states have call successors, (589), 145 states have call predecessors, (589), 194 states have return successors, (700), 611 states have call predecessors, (700), 584 states have call successors, (700) [2023-11-19 05:18:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 4464 transitions. [2023-11-19 05:18:17,510 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 4464 transitions. Word has length 81 [2023-11-19 05:18:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:17,510 INFO L495 AbstractCegarLoop]: Abstraction has 2803 states and 4464 transitions. [2023-11-19 05:18:17,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 05:18:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 4464 transitions. [2023-11-19 05:18:17,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-19 05:18:17,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:17,516 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:18:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:18:17,517 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:17,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash -93114492, now seen corresponding path program 1 times [2023-11-19 05:18:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:17,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449596712] [2023-11-19 05:18:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:17,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:17,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:17,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449596712] [2023-11-19 05:18:17,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449596712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:17,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:17,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:18:17,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121903453] [2023-11-19 05:18:17,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:17,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:18:17,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:18:17,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:18:18,000 INFO L87 Difference]: Start difference. First operand 2803 states and 4464 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:18:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:18,461 INFO L93 Difference]: Finished difference Result 4944 states and 7878 transitions. [2023-11-19 05:18:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:18:18,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2023-11-19 05:18:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:18,492 INFO L225 Difference]: With dead ends: 4944 [2023-11-19 05:18:18,492 INFO L226 Difference]: Without dead ends: 2895 [2023-11-19 05:18:18,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:18:18,583 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 6 mSDsluCounter, 2719 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:18,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3271 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:18:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2023-11-19 05:18:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2813. [2023-11-19 05:18:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2813 states, 2029 states have (on average 1.5697387875800888) internal successors, (3185), 2079 states have internal predecessors, (3185), 589 states have call successors, (589), 145 states have call predecessors, (589), 194 states have return successors, (700), 621 states have call predecessors, (700), 584 states have call successors, (700) [2023-11-19 05:18:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 4474 transitions. [2023-11-19 05:18:18,859 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 4474 transitions. Word has length 82 [2023-11-19 05:18:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:18,860 INFO L495 AbstractCegarLoop]: Abstraction has 2813 states and 4474 transitions. [2023-11-19 05:18:18,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:18:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 4474 transitions. [2023-11-19 05:18:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 05:18:18,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:18,865 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:18:18,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:18:18,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:18,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash 152957806, now seen corresponding path program 1 times [2023-11-19 05:18:18,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:18,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515842940] [2023-11-19 05:18:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:18,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:19,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:19,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515842940] [2023-11-19 05:18:19,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515842940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:19,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:19,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:18:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412959622] [2023-11-19 05:18:19,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:19,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:18:19,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:19,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:18:19,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:18:19,465 INFO L87 Difference]: Start difference. First operand 2813 states and 4474 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-19 05:18:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:22,734 INFO L93 Difference]: Finished difference Result 6823 states and 10910 transitions. [2023-11-19 05:18:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:18:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) Word has length 87 [2023-11-19 05:18:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:22,787 INFO L225 Difference]: With dead ends: 6823 [2023-11-19 05:18:22,788 INFO L226 Difference]: Without dead ends: 4524 [2023-11-19 05:18:22,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:18:22,812 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 1353 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:22,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1508 Valid, 1495 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-19 05:18:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4524 states. [2023-11-19 05:18:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4524 to 4430. [2023-11-19 05:18:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 3133 states have (on average 1.5260134056814554) internal successors, (4781), 3232 states have internal predecessors, (4781), 963 states have call successors, (963), 256 states have call predecessors, (963), 333 states have return successors, (1176), 996 states have call predecessors, (1176), 958 states have call successors, (1176) [2023-11-19 05:18:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6920 transitions. [2023-11-19 05:18:23,388 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6920 transitions. Word has length 87 [2023-11-19 05:18:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:23,389 INFO L495 AbstractCegarLoop]: Abstraction has 4430 states and 6920 transitions. [2023-11-19 05:18:23,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-19 05:18:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6920 transitions. [2023-11-19 05:18:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:18:23,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:23,396 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:18:23,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:18:23,397 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:23,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:23,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1144759597, now seen corresponding path program 1 times [2023-11-19 05:18:23,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:23,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755909782] [2023-11-19 05:18:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:23,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:23,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:23,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755909782] [2023-11-19 05:18:23,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755909782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:23,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:23,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:18:23,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649100467] [2023-11-19 05:18:23,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:23,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:18:23,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:23,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:18:23,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:18:23,801 INFO L87 Difference]: Start difference. First operand 4430 states and 6920 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 05:18:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:24,515 INFO L93 Difference]: Finished difference Result 9186 states and 14670 transitions. [2023-11-19 05:18:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:18:24,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 90 [2023-11-19 05:18:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:24,569 INFO L225 Difference]: With dead ends: 9186 [2023-11-19 05:18:24,570 INFO L226 Difference]: Without dead ends: 5182 [2023-11-19 05:18:24,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:18:24,605 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 257 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:24,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 3146 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:18:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5182 states. [2023-11-19 05:18:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5182 to 5182. [2023-11-19 05:18:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5182 states, 3829 states have (on average 1.5369548184904676) internal successors, (5885), 3948 states have internal predecessors, (5885), 981 states have call successors, (981), 274 states have call predecessors, (981), 371 states have return successors, (1194), 1014 states have call predecessors, (1194), 976 states have call successors, (1194) [2023-11-19 05:18:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5182 states to 5182 states and 8060 transitions. [2023-11-19 05:18:25,174 INFO L78 Accepts]: Start accepts. Automaton has 5182 states and 8060 transitions. Word has length 90 [2023-11-19 05:18:25,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:25,176 INFO L495 AbstractCegarLoop]: Abstraction has 5182 states and 8060 transitions. [2023-11-19 05:18:25,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 4 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 05:18:25,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5182 states and 8060 transitions. [2023-11-19 05:18:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 05:18:25,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:25,181 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:18:25,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:18:25,181 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:25,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1568652437, now seen corresponding path program 1 times [2023-11-19 05:18:25,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:25,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080936538] [2023-11-19 05:18:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:25,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:25,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080936538] [2023-11-19 05:18:25,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080936538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:25,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:25,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:18:25,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271260448] [2023-11-19 05:18:25,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:25,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:18:25,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:25,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:18:25,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:25,570 INFO L87 Difference]: Start difference. First operand 5182 states and 8060 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 05:18:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:29,714 INFO L93 Difference]: Finished difference Result 16616 states and 26545 transitions. [2023-11-19 05:18:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:18:29,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 90 [2023-11-19 05:18:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:29,800 INFO L225 Difference]: With dead ends: 16616 [2023-11-19 05:18:29,800 INFO L226 Difference]: Without dead ends: 11452 [2023-11-19 05:18:29,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:18:29,843 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 2218 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 3316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:29,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2325 Valid, 1494 Invalid, 3316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [936 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 05:18:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2023-11-19 05:18:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 10738. [2023-11-19 05:18:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10738 states, 7809 states have (on average 1.5234985273402484) internal successors, (11897), 8132 states have internal predecessors, (11897), 2172 states have call successors, (2172), 558 states have call predecessors, (2172), 756 states have return successors, (2811), 2212 states have call predecessors, (2811), 2167 states have call successors, (2811) [2023-11-19 05:18:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10738 states to 10738 states and 16880 transitions. [2023-11-19 05:18:31,050 INFO L78 Accepts]: Start accepts. Automaton has 10738 states and 16880 transitions. Word has length 90 [2023-11-19 05:18:31,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:31,050 INFO L495 AbstractCegarLoop]: Abstraction has 10738 states and 16880 transitions. [2023-11-19 05:18:31,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-19 05:18:31,051 INFO L276 IsEmpty]: Start isEmpty. Operand 10738 states and 16880 transitions. [2023-11-19 05:18:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 05:18:31,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:31,057 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 05:18:31,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:18:31,058 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:18:31,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:31,058 INFO L85 PathProgramCache]: Analyzing trace with hash 141467088, now seen corresponding path program 1 times [2023-11-19 05:18:31,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348178297] [2023-11-19 05:18:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:31,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:18:31,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:31,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348178297] [2023-11-19 05:18:31,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348178297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:31,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:31,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:18:31,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940874810] [2023-11-19 05:18:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:31,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:18:31,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:18:31,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:18:31,478 INFO L87 Difference]: Start difference. First operand 10738 states and 16880 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16)