./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:18:59,510 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:18:59,638 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:18:59,646 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:18:59,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:18:59,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:18:59,692 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:18:59,692 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:18:59,693 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:18:59,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:18:59,699 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:18:59,700 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:18:59,701 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:18:59,703 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:18:59,703 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:18:59,704 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:18:59,704 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:18:59,705 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:18:59,705 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:18:59,706 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:18:59,706 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:18:59,707 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:18:59,708 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:18:59,709 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:18:59,709 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:18:59,710 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:18:59,710 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:18:59,710 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:18:59,711 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:18:59,711 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:18:59,713 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:18:59,713 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:18:59,714 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:18:59,714 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:18:59,714 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:18:59,714 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:18:59,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:18:59,715 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:18:59,715 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:18:59,716 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:18:59,716 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:18:59,716 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:18:59,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:18:59,717 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:18:59,718 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:18:59,718 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:18:59,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:18:59,718 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_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b57471ff7da280977e3c808cc9c84e84708264492bfd0c5193cf422adb691b70 [2023-11-24 23:18:59,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:19:00,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:19:00,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:19:00,036 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:19:00,037 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:19:00,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2023-11-24 23:19:03,172 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:19:03,605 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:19:03,605 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c [2023-11-24 23:19:03,631 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/data/e252f8ae8/920bc10ae2bc40849b334de5f57f2c35/FLAG927e389c1 [2023-11-24 23:19:03,645 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/data/e252f8ae8/920bc10ae2bc40849b334de5f57f2c35 [2023-11-24 23:19:03,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:19:03,649 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:19:03,651 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:03,651 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:19:03,656 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:19:03,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:03" (1/1) ... [2023-11-24 23:19:03,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23db30ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:03, skipping insertion in model container [2023-11-24 23:19:03,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:03" (1/1) ... [2023-11-24 23:19:03,779 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:19:04,466 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_d265e382-a604-4d48-a8b4-65982a111092/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2023-11-24 23:19:04,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:04,493 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:19:04,504 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [48] [2023-11-24 23:19:04,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1575] [2023-11-24 23:19:04,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1934] [2023-11-24 23:19:04,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2300] [2023-11-24 23:19:04,507 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2391] [2023-11-24 23:19:04,507 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2404] [2023-11-24 23:19:04,507 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2439] [2023-11-24 23:19:04,507 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3105] [2023-11-24 23:19:04,508 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3114] [2023-11-24 23:19:04,508 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [3232] [2023-11-24 23:19:04,722 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_d265e382-a604-4d48-a8b4-65982a111092/sv-benchmarks/c/product-lines/elevator_spec1_product21.cil.c[66510,66523] [2023-11-24 23:19:04,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:04,799 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:19:04,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04 WrapperNode [2023-11-24 23:19:04,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:04,801 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:04,801 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:19:04,801 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:19:04,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:04,851 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:04,910 INFO L138 Inliner]: procedures = 92, calls = 340, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 849 [2023-11-24 23:19:04,911 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:04,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:19:04,912 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:19:04,912 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:19:04,934 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:04,934 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:04,954 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:04,956 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:05,004 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:05,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:05,057 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:05,063 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:05,072 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:19:05,073 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:19:05,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:19:05,074 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:19:05,075 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (1/1) ... [2023-11-24 23:19:05,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:05,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:05,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:19:05,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d265e382-a604-4d48-a8b4-65982a111092/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:19:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-24 23:19:05,163 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-24 23:19:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:19:05,164 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-24 23:19:05,164 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-24 23:19:05,165 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-24 23:19:05,165 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-24 23:19:05,165 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:19:05,166 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:19:05,166 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:19:05,166 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:19:05,166 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:19:05,167 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:19:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:19:05,168 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:19:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:19:05,170 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:19:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-24 23:19:05,171 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-24 23:19:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:19:05,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:19:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:19:05,172 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:19:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:19:05,172 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:19:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:19:05,172 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:19:05,173 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-24 23:19:05,173 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-24 23:19:05,173 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:19:05,173 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:19:05,173 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:19:05,173 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:19:05,174 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:19:05,174 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:19:05,174 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:19:05,174 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:19:05,174 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:19:05,175 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:19:05,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:19:05,175 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-24 23:19:05,175 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-24 23:19:05,175 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:19:05,175 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:19:05,176 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:19:05,176 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:19:05,176 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:19:05,177 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:19:05,177 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-24 23:19:05,178 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-24 23:19:05,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:19:05,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:19:05,179 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:19:05,179 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:19:05,388 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:19:05,391 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:19:06,769 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:19:07,885 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:19:07,885 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:19:07,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:07 BoogieIcfgContainer [2023-11-24 23:19:07,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:19:07,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:19:07,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:19:07,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:19:07,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:19:03" (1/3) ... [2023-11-24 23:19:07,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e4111c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:07, skipping insertion in model container [2023-11-24 23:19:07,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:04" (2/3) ... [2023-11-24 23:19:07,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e4111c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:07, skipping insertion in model container [2023-11-24 23:19:07,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:07" (3/3) ... [2023-11-24 23:19:07,900 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product21.cil.c [2023-11-24 23:19:07,920 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:19:07,920 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:19:08,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:19:08,008 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;@4cdd130f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:19:08,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:19:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-24 23:19:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-24 23:19:08,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:08,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:08,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:08,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash 412965801, now seen corresponding path program 1 times [2023-11-24 23:19:08,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:08,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084781284] [2023-11-24 23:19:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:08,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:19:09,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:09,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084781284] [2023-11-24 23:19:09,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084781284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:09,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:09,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:19:09,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234278776] [2023-11-24 23:19:09,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:09,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:19:09,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:09,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:19:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:19:09,315 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-24 23:19:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:10,055 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2023-11-24 23:19:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 [2023-11-24 23:19:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:10,085 INFO L225 Difference]: With dead ends: 851 [2023-11-24 23:19:10,086 INFO L226 Difference]: Without dead ends: 490 [2023-11-24 23:19:10,098 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 [2023-11-24 23:19:10,102 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 282 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2314 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:10,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2314 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:19:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-11-24 23:19:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2023-11-24 23:19:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-24 23:19:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2023-11-24 23:19:10,217 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2023-11-24 23:19:10,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:10,218 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2023-11-24 23:19:10,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-24 23:19:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2023-11-24 23:19:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-24 23:19:10,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:10,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:10,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:19:10,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:10,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:10,227 INFO L85 PathProgramCache]: Analyzing trace with hash -67014492, now seen corresponding path program 1 times [2023-11-24 23:19:10,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:10,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632780127] [2023-11-24 23:19:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:10,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:19:10,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:10,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632780127] [2023-11-24 23:19:10,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632780127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:10,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:10,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:19:10,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273130751] [2023-11-24 23:19:10,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:10,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:19:10,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:10,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:19:10,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:19:10,871 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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) [2023-11-24 23:19:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:14,780 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2023-11-24 23:19:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 23:19:14,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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 79 [2023-11-24 23:19:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:14,790 INFO L225 Difference]: With dead ends: 1287 [2023-11-24 23:19:14,790 INFO L226 Difference]: Without dead ends: 930 [2023-11-24 23:19:14,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-24 23:19:14,794 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 1740 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 3572 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 4128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 3572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:14,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1805 Valid, 2478 Invalid, 4128 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [556 Valid, 3572 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-24 23:19:14,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2023-11-24 23:19:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2023-11-24 23:19:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2023-11-24 23:19:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2023-11-24 23:19:14,902 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2023-11-24 23:19:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:14,903 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2023-11-24 23:19:14,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 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) [2023-11-24 23:19:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2023-11-24 23:19:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-24 23:19:14,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:14,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:14,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:19:14,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:14,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1659199173, now seen corresponding path program 1 times [2023-11-24 23:19:14,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:14,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098805628] [2023-11-24 23:19:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:14,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:19:15,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:15,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098805628] [2023-11-24 23:19:15,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098805628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:15,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:15,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:19:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37382967] [2023-11-24 23:19:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:15,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:19:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:19:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:15,468 INFO L87 Difference]: Start difference. First operand 874 states and 1398 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) [2023-11-24 23:19:15,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:15,769 INFO L93 Difference]: Finished difference Result 1477 states and 2374 transitions. [2023-11-24 23:19:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:19:15,770 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 84 [2023-11-24 23:19:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:15,781 INFO L225 Difference]: With dead ends: 1477 [2023-11-24 23:19:15,781 INFO L226 Difference]: Without dead ends: 963 [2023-11-24 23:19:15,788 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 [2023-11-24 23:19:15,792 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 42 mSDsluCounter, 2940 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:15,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3543 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:19:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2023-11-24 23:19:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 895. [2023-11-24 23:19:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 660 states have internal predecessors, (994), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 210 states have call predecessors, (228), 201 states have call successors, (228) [2023-11-24 23:19:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1428 transitions. [2023-11-24 23:19:15,910 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1428 transitions. Word has length 84 [2023-11-24 23:19:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:15,911 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 1428 transitions. [2023-11-24 23:19:15,912 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) [2023-11-24 23:19:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1428 transitions. [2023-11-24 23:19:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-24 23:19:15,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:15,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:15,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:19:15,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:15,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:15,918 INFO L85 PathProgramCache]: Analyzing trace with hash -229814340, now seen corresponding path program 1 times [2023-11-24 23:19:15,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:15,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574513953] [2023-11-24 23:19:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:15,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:19:16,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:16,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574513953] [2023-11-24 23:19:16,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574513953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:16,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:16,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:19:16,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642388010] [2023-11-24 23:19:16,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:16,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:19:16,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:19:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:16,312 INFO L87 Difference]: Start difference. First operand 895 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 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) [2023-11-24 23:19:16,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:16,648 INFO L93 Difference]: Finished difference Result 1506 states and 2412 transitions. [2023-11-24 23:19:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:19:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 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 [2023-11-24 23:19:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:16,661 INFO L225 Difference]: With dead ends: 1506 [2023-11-24 23:19:16,661 INFO L226 Difference]: Without dead ends: 978 [2023-11-24 23:19:16,665 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 [2023-11-24 23:19:16,667 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 41 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:16,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3557 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:19:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2023-11-24 23:19:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 898. [2023-11-24 23:19:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 632 states have (on average 1.5775316455696202) internal successors, (997), 660 states have internal predecessors, (997), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 213 states have call predecessors, (228), 201 states have call successors, (228) [2023-11-24 23:19:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1431 transitions. [2023-11-24 23:19:16,764 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1431 transitions. Word has length 83 [2023-11-24 23:19:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:16,765 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1431 transitions. [2023-11-24 23:19:16,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 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) [2023-11-24 23:19:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1431 transitions. [2023-11-24 23:19:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-24 23:19:16,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:16,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:16,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:19:16,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:16,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:16,771 INFO L85 PathProgramCache]: Analyzing trace with hash 463826715, now seen corresponding path program 1 times [2023-11-24 23:19:16,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:16,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400608883] [2023-11-24 23:19:16,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:16,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:16,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:19:17,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:17,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400608883] [2023-11-24 23:19:17,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400608883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:17,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:17,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:19:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210134916] [2023-11-24 23:19:17,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:17,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:19:17,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:19:17,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:17,156 INFO L87 Difference]: Start difference. First operand 898 states and 1431 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) [2023-11-24 23:19:17,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:17,468 INFO L93 Difference]: Finished difference Result 1511 states and 2417 transitions. [2023-11-24 23:19:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:19:17,469 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 84 [2023-11-24 23:19:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:17,506 INFO L225 Difference]: With dead ends: 1511 [2023-11-24 23:19:17,506 INFO L226 Difference]: Without dead ends: 981 [2023-11-24 23:19:17,509 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 [2023-11-24 23:19:17,513 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 42 mSDsluCounter, 2940 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:17,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3543 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:19:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2023-11-24 23:19:17,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 901. [2023-11-24 23:19:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 635 states have (on average 1.5748031496062993) internal successors, (1000), 660 states have internal predecessors, (1000), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 216 states have call predecessors, (228), 201 states have call successors, (228) [2023-11-24 23:19:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1434 transitions. [2023-11-24 23:19:17,586 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1434 transitions. Word has length 84 [2023-11-24 23:19:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:17,588 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1434 transitions. [2023-11-24 23:19:17,588 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) [2023-11-24 23:19:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1434 transitions. [2023-11-24 23:19:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-24 23:19:17,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:17,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:17,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:19:17,593 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:17,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:17,593 INFO L85 PathProgramCache]: Analyzing trace with hash 837166515, now seen corresponding path program 1 times [2023-11-24 23:19:17,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:17,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599305262] [2023-11-24 23:19:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:17,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:19:17,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:17,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599305262] [2023-11-24 23:19:17,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599305262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:17,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:18,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:19:18,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474376197] [2023-11-24 23:19:18,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:18,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:19:18,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:18,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:19:18,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:19:18,002 INFO L87 Difference]: Start difference. First operand 901 states and 1434 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-24 23:19:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:20,753 INFO L93 Difference]: Finished difference Result 2053 states and 3286 transitions. [2023-11-24 23:19:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:19:20,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 88 [2023-11-24 23:19:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:20,771 INFO L225 Difference]: With dead ends: 2053 [2023-11-24 23:19:20,771 INFO L226 Difference]: Without dead ends: 1400 [2023-11-24 23:19:20,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:19:20,779 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 2362 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 992 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2527 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 992 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:20,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2527 Valid, 1390 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [992 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-24 23:19:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2023-11-24 23:19:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1302. [2023-11-24 23:19:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 904 states have (on average 1.5342920353982301) internal successors, (1387), 944 states have internal predecessors, (1387), 306 states have call successors, (306), 77 states have call predecessors, (306), 91 states have return successors, (346), 317 states have call predecessors, (346), 301 states have call successors, (346) [2023-11-24 23:19:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2039 transitions. [2023-11-24 23:19:20,895 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2039 transitions. Word has length 88 [2023-11-24 23:19:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:20,896 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 2039 transitions. [2023-11-24 23:19:20,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-24 23:19:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2039 transitions. [2023-11-24 23:19:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-24 23:19:20,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:20,900 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:20,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:19:20,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:20,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1209892621, now seen corresponding path program 1 times [2023-11-24 23:19:20,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:20,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924355553] [2023-11-24 23:19:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:20,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:19:21,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:21,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924355553] [2023-11-24 23:19:21,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924355553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:21,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:21,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:19:21,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528578918] [2023-11-24 23:19:21,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:21,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:19:21,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:19:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:21,271 INFO L87 Difference]: Start difference. First operand 1302 states and 2039 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2023-11-24 23:19:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:21,691 INFO L93 Difference]: Finished difference Result 2584 states and 4121 transitions. [2023-11-24 23:19:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:19:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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 91 [2023-11-24 23:19:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:21,704 INFO L225 Difference]: With dead ends: 2584 [2023-11-24 23:19:21,704 INFO L226 Difference]: Without dead ends: 1506 [2023-11-24 23:19:21,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:19:21,715 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 246 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:21,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 2643 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:19:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2023-11-24 23:19:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2023-11-24 23:19:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1092 states have (on average 1.5393772893772895) internal successors, (1681), 1138 states have internal predecessors, (1681), 311 states have call successors, (311), 82 states have call predecessors, (311), 102 states have return successors, (351), 322 states have call predecessors, (351), 306 states have call successors, (351) [2023-11-24 23:19:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2343 transitions. [2023-11-24 23:19:21,835 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2343 transitions. Word has length 91 [2023-11-24 23:19:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:21,836 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2343 transitions. [2023-11-24 23:19:21,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) [2023-11-24 23:19:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2343 transitions. [2023-11-24 23:19:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-24 23:19:21,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:21,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:21,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:19:21,840 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:21,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:21,840 INFO L85 PathProgramCache]: Analyzing trace with hash -157968719, now seen corresponding path program 1 times [2023-11-24 23:19:21,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:21,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147844329] [2023-11-24 23:19:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:19:23,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:23,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147844329] [2023-11-24 23:19:23,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147844329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:23,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:23,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:19:23,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700557498] [2023-11-24 23:19:23,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:23,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:19:23,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:19:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:23,501 INFO L87 Difference]: Start difference. First operand 1506 states and 2343 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-24 23:19:27,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:27,818 INFO L93 Difference]: Finished difference Result 6018 states and 9554 transitions. [2023-11-24 23:19:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:19:27,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2023-11-24 23:19:27,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:27,859 INFO L225 Difference]: With dead ends: 6018 [2023-11-24 23:19:27,859 INFO L226 Difference]: Without dead ends: 4248 [2023-11-24 23:19:27,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:19:27,873 INFO L413 NwaCegarLoop]: 504 mSDtfsCounter, 2565 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2637 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:27,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2637 Valid, 1398 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-24 23:19:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4248 states. [2023-11-24 23:19:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4248 to 3957. [2023-11-24 23:19:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3957 states, 2834 states have (on average 1.514820042342978) internal successors, (4293), 2966 states have internal predecessors, (4293), 854 states have call successors, (854), 216 states have call predecessors, (854), 268 states have return successors, (1017), 865 states have call predecessors, (1017), 849 states have call successors, (1017) [2023-11-24 23:19:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3957 states to 3957 states and 6164 transitions. [2023-11-24 23:19:28,451 INFO L78 Accepts]: Start accepts. Automaton has 3957 states and 6164 transitions. Word has length 91 [2023-11-24 23:19:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:28,452 INFO L495 AbstractCegarLoop]: Abstraction has 3957 states and 6164 transitions. [2023-11-24 23:19:28,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-24 23:19:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3957 states and 6164 transitions. [2023-11-24 23:19:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-24 23:19:28,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:28,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:28,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:19:28,457 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:28,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash 880233906, now seen corresponding path program 1 times [2023-11-24 23:19:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164222464] [2023-11-24 23:19:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:19:28,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:28,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164222464] [2023-11-24 23:19:28,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164222464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:28,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:28,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:19:28,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619958328] [2023-11-24 23:19:28,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:28,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:19:28,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:28,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:19:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:19:28,819 INFO L87 Difference]: Start difference. First operand 3957 states and 6164 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) [2023-11-24 23:19:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:31,374 INFO L93 Difference]: Finished difference Result 7517 states and 11784 transitions. [2023-11-24 23:19:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:19:31,375 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 93 [2023-11-24 23:19:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:31,413 INFO L225 Difference]: With dead ends: 7517 [2023-11-24 23:19:31,413 INFO L226 Difference]: Without dead ends: 4463 [2023-11-24 23:19:31,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:19:31,432 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 997 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:31,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 1608 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-24 23:19:31,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2023-11-24 23:19:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 4038. [2023-11-24 23:19:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 2888 states have (on average 1.509349030470914) internal successors, (4359), 3032 states have internal predecessors, (4359), 857 states have call successors, (857), 231 states have call predecessors, (857), 292 states have return successors, (1050), 865 states have call predecessors, (1050), 852 states have call successors, (1050) [2023-11-24 23:19:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 6266 transitions. [2023-11-24 23:19:31,961 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 6266 transitions. Word has length 93 [2023-11-24 23:19:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:31,962 INFO L495 AbstractCegarLoop]: Abstraction has 4038 states and 6266 transitions. [2023-11-24 23:19:31,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-24 23:19:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 6266 transitions. [2023-11-24 23:19:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-24 23:19:31,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:31,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:31,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:19:31,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:31,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash -962899676, now seen corresponding path program 1 times [2023-11-24 23:19:31,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:31,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514359605] [2023-11-24 23:19:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:31,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:19:32,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:32,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514359605] [2023-11-24 23:19:32,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514359605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:32,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:32,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:19:32,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307061852] [2023-11-24 23:19:32,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:32,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:19:32,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:19:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:32,297 INFO L87 Difference]: Start difference. First operand 4038 states and 6266 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-24 23:19:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:33,483 INFO L93 Difference]: Finished difference Result 4142 states and 6428 transitions. [2023-11-24 23:19:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:19:33,484 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), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2023-11-24 23:19:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:33,521 INFO L225 Difference]: With dead ends: 4142 [2023-11-24 23:19:33,522 INFO L226 Difference]: Without dead ends: 4127 [2023-11-24 23:19:33,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:19:33,526 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 685 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:33,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1825 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:19:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2023-11-24 23:19:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 4044. [2023-11-24 23:19:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 2894 states have (on average 1.508293020041465) internal successors, (4365), 3038 states have internal predecessors, (4365), 857 states have call successors, (857), 231 states have call predecessors, (857), 292 states have return successors, (1050), 865 states have call predecessors, (1050), 852 states have call successors, (1050) [2023-11-24 23:19:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 6272 transitions. [2023-11-24 23:19:34,089 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 6272 transitions. Word has length 97 [2023-11-24 23:19:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:34,090 INFO L495 AbstractCegarLoop]: Abstraction has 4044 states and 6272 transitions. [2023-11-24 23:19:34,090 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), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-24 23:19:34,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 6272 transitions. [2023-11-24 23:19:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-24 23:19:34,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:34,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:34,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:19:34,095 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:34,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash 600343808, now seen corresponding path program 1 times [2023-11-24 23:19:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:34,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358967478] [2023-11-24 23:19:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:34,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:19:34,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:34,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358967478] [2023-11-24 23:19:34,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358967478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:34,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:34,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:19:34,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032793129] [2023-11-24 23:19:34,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:34,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:19:34,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:19:34,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:19:34,487 INFO L87 Difference]: Start difference. First operand 4044 states and 6272 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-24 23:19:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:35,293 INFO L93 Difference]: Finished difference Result 4209 states and 6525 transitions. [2023-11-24 23:19:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:19:35,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 101 [2023-11-24 23:19:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:35,341 INFO L225 Difference]: With dead ends: 4209 [2023-11-24 23:19:35,342 INFO L226 Difference]: Without dead ends: 4050 [2023-11-24 23:19:35,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:19:35,345 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 350 mSDsluCounter, 3519 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 4054 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:35,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 4054 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:19:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4050 states. [2023-11-24 23:19:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4050 to 4044. [2023-11-24 23:19:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 2894 states have (on average 1.4944713199723565) internal successors, (4325), 3038 states have internal predecessors, (4325), 857 states have call successors, (857), 231 states have call predecessors, (857), 292 states have return successors, (1050), 865 states have call predecessors, (1050), 852 states have call successors, (1050) [2023-11-24 23:19:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 6232 transitions. [2023-11-24 23:19:35,815 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 6232 transitions. Word has length 101 [2023-11-24 23:19:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:35,815 INFO L495 AbstractCegarLoop]: Abstraction has 4044 states and 6232 transitions. [2023-11-24 23:19:35,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-24 23:19:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 6232 transitions. [2023-11-24 23:19:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-24 23:19:35,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:35,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:35,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 23:19:35,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:35,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash 986884524, now seen corresponding path program 1 times [2023-11-24 23:19:35,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:35,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673950508] [2023-11-24 23:19:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:35,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 23:19:36,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:36,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673950508] [2023-11-24 23:19:36,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673950508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:36,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:36,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:19:36,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078766234] [2023-11-24 23:19:36,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:36,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:19:36,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:19:36,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:19:36,383 INFO L87 Difference]: Start difference. First operand 4044 states and 6232 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-24 23:19:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:40,981 INFO L93 Difference]: Finished difference Result 14751 states and 23122 transitions. [2023-11-24 23:19:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:19:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 109 [2023-11-24 23:19:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:41,054 INFO L225 Difference]: With dead ends: 14751 [2023-11-24 23:19:41,055 INFO L226 Difference]: Without dead ends: 10730 [2023-11-24 23:19:41,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:19:41,079 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 2745 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 2659 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2853 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 2659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:41,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2853 Valid, 1466 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 2659 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-24 23:19:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10730 states. [2023-11-24 23:19:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10730 to 9477. [2023-11-24 23:19:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9477 states, 6733 states have (on average 1.5061636714688846) internal successors, (10141), 7100 states have internal predecessors, (10141), 2111 states have call successors, (2111), 497 states have call predecessors, (2111), 632 states have return successors, (2538), 2016 states have call predecessors, (2538), 2106 states have call successors, (2538) [2023-11-24 23:19:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9477 states to 9477 states and 14790 transitions. [2023-11-24 23:19:42,461 INFO L78 Accepts]: Start accepts. Automaton has 9477 states and 14790 transitions. Word has length 109 [2023-11-24 23:19:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:42,461 INFO L495 AbstractCegarLoop]: Abstraction has 9477 states and 14790 transitions. [2023-11-24 23:19:42,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-24 23:19:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 9477 states and 14790 transitions. [2023-11-24 23:19:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-24 23:19:42,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:42,466 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:19:42,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 23:19:42,467 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:19:42,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:42,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1200483762, now seen corresponding path program 1 times [2023-11-24 23:19:42,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:42,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68966063] [2023-11-24 23:19:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:42,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat