./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/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_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/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_b7e91c9e-11c8-4022-857b-1d993f938509/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 ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:06:17,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:06:17,608 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:06:17,619 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:06:17,620 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:06:17,661 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:06:17,661 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:06:17,662 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:06:17,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:06:17,664 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:06:17,664 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:06:17,665 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:06:17,665 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:06:17,666 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:06:17,667 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:06:17,667 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:06:17,668 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:06:17,668 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:06:17,669 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:06:17,670 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:06:17,670 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:06:17,675 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:06:17,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:06:17,677 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:06:17,682 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:06:17,682 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:06:17,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:06:17,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:06:17,684 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:06:17,684 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:06:17,686 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:06:17,686 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:06:17,686 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:06:17,687 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:06:17,687 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:06:17,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:06:17,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:06:17,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:17,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:06:17,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:06:17,689 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:06:17,690 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:06:17,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:06:17,690 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:06:17,691 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:06:17,691 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:06:17,692 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:06:17,692 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_b7e91c9e-11c8-4022-857b-1d993f938509/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 [2023-11-25 00:06:18,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:06:18,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:06:18,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:06:18,033 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:06:18,034 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:06:18,035 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2023-11-25 00:06:21,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:06:21,690 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:06:21,691 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2023-11-25 00:06:21,727 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/data/4d2a6d574/a3ebe6d0fa0f4083bc5ff9bf43267963/FLAG63161ca0e [2023-11-25 00:06:21,744 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/data/4d2a6d574/a3ebe6d0fa0f4083bc5ff9bf43267963 [2023-11-25 00:06:21,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:06:21,754 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:06:21,759 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:21,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:06:21,765 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:06:21,766 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:21" (1/1) ... [2023-11-25 00:06:21,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c6f9c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:21, skipping insertion in model container [2023-11-25 00:06:21,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:21" (1/1) ... [2023-11-25 00:06:21,870 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:06:22,326 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_b7e91c9e-11c8-4022-857b-1d993f938509/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2023-11-25 00:06:22,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:22,557 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:06:22,568 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [48] [2023-11-25 00:06:22,570 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [414] [2023-11-25 00:06:22,570 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification3_spec.i","") [514] [2023-11-25 00:06:22,570 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [704] [2023-11-25 00:06:22,571 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1371] [2023-11-25 00:06:22,571 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1389] [2023-11-25 00:06:22,571 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1427] [2023-11-25 00:06:22,571 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1436] [2023-11-25 00:06:22,572 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2938] [2023-11-25 00:06:22,572 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [3057] [2023-11-25 00:06:22,642 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_b7e91c9e-11c8-4022-857b-1d993f938509/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2023-11-25 00:06:22,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:22,736 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:06:22,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22 WrapperNode [2023-11-25 00:06:22,736 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:22,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:22,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:06:22,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:06:22,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,785 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,843 INFO L138 Inliner]: procedures = 90, calls = 342, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 1042 [2023-11-25 00:06:22,843 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:22,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:06:22,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:06:22,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:06:22,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,911 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,939 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,957 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,977 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,986 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:06:22,989 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:06:22,989 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:06:22,989 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:06:22,990 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (1/1) ... [2023-11-25 00:06:22,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:23,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:06:23,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:06:23,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:06:23,070 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-25 00:06:23,070 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-25 00:06:23,071 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-25 00:06:23,071 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-25 00:06:23,072 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-25 00:06:23,072 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-25 00:06:23,072 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-25 00:06:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-25 00:06:23,073 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-25 00:06:23,073 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-25 00:06:23,074 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-25 00:06:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-25 00:06:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-25 00:06:23,075 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-25 00:06:23,075 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-25 00:06:23,078 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-25 00:06:23,078 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-25 00:06:23,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-25 00:06:23,079 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-25 00:06:23,079 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-25 00:06:23,079 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-25 00:06:23,080 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-25 00:06:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-25 00:06:23,080 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-25 00:06:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-25 00:06:23,081 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-25 00:06:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-11-25 00:06:23,081 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-11-25 00:06:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-25 00:06:23,081 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-25 00:06:23,081 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-11-25 00:06:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-11-25 00:06:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-25 00:06:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-25 00:06:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-25 00:06:23,082 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-25 00:06:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-25 00:06:23,083 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-25 00:06:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-25 00:06:23,083 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-25 00:06:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2023-11-25 00:06:23,083 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2023-11-25 00:06:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:06:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-25 00:06:23,084 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-25 00:06:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-25 00:06:23,084 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-25 00:06:23,084 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-25 00:06:23,085 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-25 00:06:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-25 00:06:23,086 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-25 00:06:23,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:06:23,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:06:23,087 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-25 00:06:23,087 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-25 00:06:23,294 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:06:23,297 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:06:24,325 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:06:25,160 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:06:25,161 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:06:25,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:25 BoogieIcfgContainer [2023-11-25 00:06:25,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:06:25,165 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:06:25,165 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:06:25,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:06:25,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:06:21" (1/3) ... [2023-11-25 00:06:25,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f698b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:25, skipping insertion in model container [2023-11-25 00:06:25,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:22" (2/3) ... [2023-11-25 00:06:25,170 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f698b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:25, skipping insertion in model container [2023-11-25 00:06:25,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:25" (3/3) ... [2023-11-25 00:06:25,172 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product03.cil.c [2023-11-25 00:06:25,192 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:06:25,192 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:06:25,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:06:25,260 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;@50d089d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:06:25,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:06:25,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2023-11-25 00:06:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-25 00:06:25,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:25,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:25,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:25,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1030660278, now seen corresponding path program 1 times [2023-11-25 00:06:25,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:25,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307110748] [2023-11-25 00:06:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:25,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-25 00:06:26,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:26,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307110748] [2023-11-25 00:06:26,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307110748] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:26,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976183128] [2023-11-25 00:06:26,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:26,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:26,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:26,505 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:26,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:06:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:27,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:06:27,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:06:27,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:27,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976183128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:27,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:06:27,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-25 00:06:27,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846524725] [2023-11-25 00:06:27,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:06:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:06:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:06:27,178 INFO L87 Difference]: Start difference. First operand has 404 states, 270 states have (on average 1.5740740740740742) internal successors, (425), 288 states have internal predecessors, (425), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:06:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:27,534 INFO L93 Difference]: Finished difference Result 1135 states and 1815 transitions. [2023-11-25 00:06:27,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2023-11-25 00:06:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:27,568 INFO L225 Difference]: With dead ends: 1135 [2023-11-25 00:06:27,569 INFO L226 Difference]: Without dead ends: 733 [2023-11-25 00:06:27,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:06:27,585 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 505 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:27,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1203 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:06:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2023-11-25 00:06:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 721. [2023-11-25 00:06:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 487 states have (on average 1.566735112936345) internal successors, (763), 518 states have internal predecessors, (763), 187 states have call successors, (187), 47 states have call predecessors, (187), 46 states have return successors, (189), 181 states have call predecessors, (189), 184 states have call successors, (189) [2023-11-25 00:06:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1139 transitions. [2023-11-25 00:06:27,773 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1139 transitions. Word has length 87 [2023-11-25 00:06:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:27,774 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1139 transitions. [2023-11-25 00:06:27,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:06:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1139 transitions. [2023-11-25 00:06:27,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-25 00:06:27,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:27,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:27,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-25 00:06:27,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:27,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:27,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:27,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1305270579, now seen corresponding path program 1 times [2023-11-25 00:06:27,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:27,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430700156] [2023-11-25 00:06:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:27,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-25 00:06:28,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:28,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430700156] [2023-11-25 00:06:28,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430700156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:28,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060328885] [2023-11-25 00:06:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:28,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:28,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:28,503 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:28,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:06:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:28,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 1572 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:06:28,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-25 00:06:29,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:29,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060328885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:29,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:06:29,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-25 00:06:29,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962244140] [2023-11-25 00:06:29,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:29,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:06:29,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:06:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:06:29,060 INFO L87 Difference]: Start difference. First operand 721 states and 1139 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-25 00:06:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:29,294 INFO L93 Difference]: Finished difference Result 1765 states and 2819 transitions. [2023-11-25 00:06:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:29,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2023-11-25 00:06:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:29,306 INFO L225 Difference]: With dead ends: 1765 [2023-11-25 00:06:29,306 INFO L226 Difference]: Without dead ends: 1056 [2023-11-25 00:06:29,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:06:29,313 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 561 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:29,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1086 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2023-11-25 00:06:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1032. [2023-11-25 00:06:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 701 states have (on average 1.5748930099857346) internal successors, (1104), 747 states have internal predecessors, (1104), 265 states have call successors, (265), 65 states have call predecessors, (265), 65 states have return successors, (272), 258 states have call predecessors, (272), 262 states have call successors, (272) [2023-11-25 00:06:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1641 transitions. [2023-11-25 00:06:29,421 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1641 transitions. Word has length 86 [2023-11-25 00:06:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:29,423 INFO L495 AbstractCegarLoop]: Abstraction has 1032 states and 1641 transitions. [2023-11-25 00:06:29,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-25 00:06:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1641 transitions. [2023-11-25 00:06:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-25 00:06:29,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:29,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:29,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:29,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:29,641 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:29,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash -87164254, now seen corresponding path program 1 times [2023-11-25 00:06:29,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:29,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527663720] [2023-11-25 00:06:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:29,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-25 00:06:30,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:30,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527663720] [2023-11-25 00:06:30,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527663720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:30,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:30,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:06:30,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022025391] [2023-11-25 00:06:30,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:30,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:06:30,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:30,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:06:30,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:06:30,188 INFO L87 Difference]: Start difference. First operand 1032 states and 1641 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:06:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:31,154 INFO L93 Difference]: Finished difference Result 3041 states and 4906 transitions. [2023-11-25 00:06:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:06:31,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2023-11-25 00:06:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:31,170 INFO L225 Difference]: With dead ends: 3041 [2023-11-25 00:06:31,171 INFO L226 Difference]: Without dead ends: 2021 [2023-11-25 00:06:31,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:06:31,180 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 617 mSDsluCounter, 2334 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:31,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 2994 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:06:31,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2023-11-25 00:06:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1930. [2023-11-25 00:06:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1337 states have (on average 1.5818997756170532) internal successors, (2115), 1425 states have internal predecessors, (2115), 473 states have call successors, (473), 118 states have call predecessors, (473), 119 states have return successors, (520), 446 states have call predecessors, (520), 469 states have call successors, (520) [2023-11-25 00:06:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3108 transitions. [2023-11-25 00:06:31,336 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3108 transitions. Word has length 87 [2023-11-25 00:06:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:31,336 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 3108 transitions. [2023-11-25 00:06:31,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:06:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3108 transitions. [2023-11-25 00:06:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-25 00:06:31,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:31,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:31,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:06:31,342 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:31,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:31,343 INFO L85 PathProgramCache]: Analyzing trace with hash 488845341, now seen corresponding path program 1 times [2023-11-25 00:06:31,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:31,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658616312] [2023-11-25 00:06:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:31,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-25 00:06:31,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:31,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658616312] [2023-11-25 00:06:31,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658616312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:31,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956883889] [2023-11-25 00:06:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:31,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:31,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:31,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:31,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:06:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:32,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:06:32,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-25 00:06:32,309 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:32,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956883889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:32,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:06:32,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-25 00:06:32,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768116389] [2023-11-25 00:06:32,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:32,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:06:32,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:06:32,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:06:32,312 INFO L87 Difference]: Start difference. First operand 1930 states and 3108 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:06:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:32,841 INFO L93 Difference]: Finished difference Result 5530 states and 9011 transitions. [2023-11-25 00:06:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:32,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2023-11-25 00:06:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:32,883 INFO L225 Difference]: With dead ends: 5530 [2023-11-25 00:06:32,883 INFO L226 Difference]: Without dead ends: 3613 [2023-11-25 00:06:32,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:06:32,910 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 493 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:32,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 1140 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:06:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3613 states. [2023-11-25 00:06:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3613 to 3585. [2023-11-25 00:06:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 2463 states have (on average 1.5306536743808363) internal successors, (3770), 2637 states have internal predecessors, (3770), 894 states have call successors, (894), 230 states have call predecessors, (894), 227 states have return successors, (1025), 831 states have call predecessors, (1025), 888 states have call successors, (1025) [2023-11-25 00:06:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 5689 transitions. [2023-11-25 00:06:33,197 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 5689 transitions. Word has length 88 [2023-11-25 00:06:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:33,199 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 5689 transitions. [2023-11-25 00:06:33,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:06:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 5689 transitions. [2023-11-25 00:06:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-25 00:06:33,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:33,207 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:33,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:33,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:33,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:33,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash 126764351, now seen corresponding path program 1 times [2023-11-25 00:06:33,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:33,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153177453] [2023-11-25 00:06:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:33,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-25 00:06:33,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:33,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153177453] [2023-11-25 00:06:33,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153177453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132770457] [2023-11-25 00:06:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:33,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:33,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:33,842 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:33,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:06:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:34,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-25 00:06:34,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-25 00:06:34,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:34,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132770457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:34,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:06:34,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-25 00:06:34,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839076225] [2023-11-25 00:06:34,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:34,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:06:34,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:06:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:06:34,316 INFO L87 Difference]: Start difference. First operand 3585 states and 5689 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-25 00:06:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:35,402 INFO L93 Difference]: Finished difference Result 6852 states and 10923 transitions. [2023-11-25 00:06:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:06:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2023-11-25 00:06:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:35,430 INFO L225 Difference]: With dead ends: 6852 [2023-11-25 00:06:35,431 INFO L226 Difference]: Without dead ends: 3279 [2023-11-25 00:06:35,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:06:35,464 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 518 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 2576 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:35,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 2576 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:06:35,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2023-11-25 00:06:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 3257. [2023-11-25 00:06:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 2251 states have (on average 1.5175477565526432) internal successors, (3416), 2399 states have internal predecessors, (3416), 794 states have call successors, (794), 214 states have call predecessors, (794), 211 states have return successors, (924), 739 states have call predecessors, (924), 788 states have call successors, (924) [2023-11-25 00:06:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 5134 transitions. [2023-11-25 00:06:35,684 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 5134 transitions. Word has length 89 [2023-11-25 00:06:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:35,684 INFO L495 AbstractCegarLoop]: Abstraction has 3257 states and 5134 transitions. [2023-11-25 00:06:35,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-25 00:06:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 5134 transitions. [2023-11-25 00:06:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-25 00:06:35,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:35,690 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:35,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:35,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:35,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:35,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2034258556, now seen corresponding path program 1 times [2023-11-25 00:06:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:35,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121717868] [2023-11-25 00:06:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-25 00:06:36,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:36,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121717868] [2023-11-25 00:06:36,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121717868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:36,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556264293] [2023-11-25 00:06:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:36,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:36,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:36,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:36,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:06:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:36,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-25 00:06:36,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-25 00:06:36,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:36,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556264293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:36,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:06:36,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-11-25 00:06:36,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133206464] [2023-11-25 00:06:36,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:36,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:06:36,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:06:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:06:36,801 INFO L87 Difference]: Start difference. First operand 3257 states and 5134 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:06:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:37,220 INFO L93 Difference]: Finished difference Result 7233 states and 11462 transitions. [2023-11-25 00:06:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:37,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2023-11-25 00:06:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:37,262 INFO L225 Difference]: With dead ends: 7233 [2023-11-25 00:06:37,262 INFO L226 Difference]: Without dead ends: 3988 [2023-11-25 00:06:37,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:06:37,293 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 556 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:37,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1209 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2023-11-25 00:06:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 3204. [2023-11-25 00:06:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3204 states, 2214 states have (on average 1.5176151761517616) internal successors, (3360), 2363 states have internal predecessors, (3360), 784 states have call successors, (784), 210 states have call predecessors, (784), 205 states have return successors, (887), 726 states have call predecessors, (887), 778 states have call successors, (887) [2023-11-25 00:06:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3204 states to 3204 states and 5031 transitions. [2023-11-25 00:06:37,608 INFO L78 Accepts]: Start accepts. Automaton has 3204 states and 5031 transitions. Word has length 88 [2023-11-25 00:06:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:37,609 INFO L495 AbstractCegarLoop]: Abstraction has 3204 states and 5031 transitions. [2023-11-25 00:06:37,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-25 00:06:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3204 states and 5031 transitions. [2023-11-25 00:06:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-25 00:06:37,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:37,613 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:37,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:37,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:37,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:37,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1068608410, now seen corresponding path program 1 times [2023-11-25 00:06:37,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:37,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556635477] [2023-11-25 00:06:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:37,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-25 00:06:38,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:38,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556635477] [2023-11-25 00:06:38,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556635477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:38,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:38,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:06:38,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105580997] [2023-11-25 00:06:38,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:38,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:06:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:38,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:06:38,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:06:38,580 INFO L87 Difference]: Start difference. First operand 3204 states and 5031 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-25 00:06:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:39,653 INFO L93 Difference]: Finished difference Result 9163 states and 14594 transitions. [2023-11-25 00:06:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:06:39,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2023-11-25 00:06:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:39,712 INFO L225 Difference]: With dead ends: 9163 [2023-11-25 00:06:39,713 INFO L226 Difference]: Without dead ends: 5971 [2023-11-25 00:06:39,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:06:39,737 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 611 mSDsluCounter, 2953 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 3602 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:39,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 3602 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:06:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2023-11-25 00:06:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 5838. [2023-11-25 00:06:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 4090 states have (on average 1.5183374083129584) internal successors, (6210), 4361 states have internal predecessors, (6210), 1378 states have call successors, (1378), 377 states have call predecessors, (1378), 369 states have return successors, (1646), 1249 states have call predecessors, (1646), 1370 states have call successors, (1646) [2023-11-25 00:06:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 9234 transitions. [2023-11-25 00:06:40,194 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 9234 transitions. Word has length 94 [2023-11-25 00:06:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:40,195 INFO L495 AbstractCegarLoop]: Abstraction has 5838 states and 9234 transitions. [2023-11-25 00:06:40,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-25 00:06:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 9234 transitions. [2023-11-25 00:06:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-25 00:06:40,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:40,200 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:40,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-25 00:06:40,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:40,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash 620787418, now seen corresponding path program 1 times [2023-11-25 00:06:40,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:40,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590312544] [2023-11-25 00:06:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-25 00:06:40,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:40,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590312544] [2023-11-25 00:06:40,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590312544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:40,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309176693] [2023-11-25 00:06:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:40,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:40,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:40,581 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:40,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:06:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:40,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 1610 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-25 00:06:40,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-25 00:06:41,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:06:41,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309176693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:41,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:06:41,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-25 00:06:41,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863138722] [2023-11-25 00:06:41,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:41,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:06:41,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:06:41,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:06:41,300 INFO L87 Difference]: Start difference. First operand 5838 states and 9234 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-25 00:06:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:43,306 INFO L93 Difference]: Finished difference Result 12381 states and 19533 transitions. [2023-11-25 00:06:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:06:43,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 100 [2023-11-25 00:06:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:43,386 INFO L225 Difference]: With dead ends: 12381 [2023-11-25 00:06:43,386 INFO L226 Difference]: Without dead ends: 6555 [2023-11-25 00:06:43,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:06:43,417 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 1057 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:43,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1060 Valid, 2053 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-25 00:06:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6555 states. [2023-11-25 00:06:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6555 to 6518. [2023-11-25 00:06:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 4602 states have (on average 1.49587136027814) internal successors, (6884), 4889 states have internal predecessors, (6884), 1498 states have call successors, (1498), 433 states have call predecessors, (1498), 417 states have return successors, (1776), 1345 states have call predecessors, (1776), 1490 states have call successors, (1776) [2023-11-25 00:06:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 10158 transitions. [2023-11-25 00:06:43,966 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 10158 transitions. Word has length 100 [2023-11-25 00:06:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:43,968 INFO L495 AbstractCegarLoop]: Abstraction has 6518 states and 10158 transitions. [2023-11-25 00:06:43,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-25 00:06:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 10158 transitions. [2023-11-25 00:06:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-25 00:06:43,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:43,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:43,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:44,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7e91c9e-11c8-4022-857b-1d993f938509/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:44,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:44,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2062011796, now seen corresponding path program 1 times [2023-11-25 00:06:44,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:44,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142399678] [2023-11-25 00:06:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:44,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-25 00:06:44,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:44,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142399678] [2023-11-25 00:06:44,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142399678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:44,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:44,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:06:44,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164925542] [2023-11-25 00:06:44,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:44,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:06:44,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:06:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:06:44,618 INFO L87 Difference]: Start difference. First operand 6518 states and 10158 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-25 00:06:45,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:45,552 INFO L93 Difference]: Finished difference Result 13388 states and 21251 transitions. [2023-11-25 00:06:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:06:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2023-11-25 00:06:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:45,619 INFO L225 Difference]: With dead ends: 13388 [2023-11-25 00:06:45,619 INFO L226 Difference]: Without dead ends: 8043 [2023-11-25 00:06:45,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:06:45,649 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 202 mSDsluCounter, 2982 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:45,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 3608 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:06:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8043 states. [2023-11-25 00:06:46,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8043 to 6692. [2023-11-25 00:06:46,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6692 states, 4738 states have (on average 1.4850147741663149) internal successors, (7036), 5025 states have internal predecessors, (7036), 1506 states have call successors, (1506), 433 states have call predecessors, (1506), 447 states have return successors, (1859), 1371 states have call predecessors, (1859), 1498 states have call successors, (1859) [2023-11-25 00:06:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6692 states to 6692 states and 10401 transitions. [2023-11-25 00:06:46,245 INFO L78 Accepts]: Start accepts. Automaton has 6692 states and 10401 transitions. Word has length 105 [2023-11-25 00:06:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:46,246 INFO L495 AbstractCegarLoop]: Abstraction has 6692 states and 10401 transitions. [2023-11-25 00:06:46,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-25 00:06:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6692 states and 10401 transitions. [2023-11-25 00:06:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-25 00:06:46,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:46,250 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-25 00:06:46,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:46,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1141288547, now seen corresponding path program 1 times [2023-11-25 00:06:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:46,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518954556] [2023-11-25 00:06:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-25 00:06:47,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:47,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518954556] [2023-11-25 00:06:47,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518954556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:47,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:47,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-25 00:06:47,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800810824] [2023-11-25 00:06:47,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:47,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:06:47,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:06:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:06:47,108 INFO L87 Difference]: Start difference. First operand 6692 states and 10401 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-25 00:06:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:52,454 INFO L93 Difference]: Finished difference Result 16849 states and 26659 transitions. [2023-11-25 00:06:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-25 00:06:52,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 109 [2023-11-25 00:06:52,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:52,524 INFO L225 Difference]: With dead ends: 16849 [2023-11-25 00:06:52,525 INFO L226 Difference]: Without dead ends: 12022 [2023-11-25 00:06:52,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-11-25 00:06:52,551 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 2140 mSDsluCounter, 2451 mSDsCounter, 0 mSdLazyCounter, 4417 mSolverCounterSat, 953 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2243 SdHoareTripleChecker+Valid, 2839 SdHoareTripleChecker+Invalid, 5370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 4417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:52,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2243 Valid, 2839 Invalid, 5370 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [953 Valid, 4417 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-25 00:06:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12022 states. [2023-11-25 00:06:53,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12022 to 11429. [2023-11-25 00:06:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11429 states, 8147 states have (on average 1.4917147416226832) internal successors, (12153), 8622 states have internal predecessors, (12153), 2486 states have call successors, (2486), 739 states have call predecessors, (2486), 795 states have return successors, (3260), 2295 states have call predecessors, (3260), 2474 states have call successors, (3260) [2023-11-25 00:06:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11429 states to 11429 states and 17899 transitions. [2023-11-25 00:06:53,476 INFO L78 Accepts]: Start accepts. Automaton has 11429 states and 17899 transitions. Word has length 109 [2023-11-25 00:06:53,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:53,476 INFO L495 AbstractCegarLoop]: Abstraction has 11429 states and 17899 transitions. [2023-11-25 00:06:53,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-25 00:06:53,476 INFO L276 IsEmpty]: Start isEmpty. Operand 11429 states and 17899 transitions. [2023-11-25 00:06:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-25 00:06:53,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:53,483 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-25 00:06:53,484 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:53,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -610012867, now seen corresponding path program 1 times [2023-11-25 00:06:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738171676] [2023-11-25 00:06:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:53,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-25 00:06:54,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:54,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738171676] [2023-11-25 00:06:54,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738171676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:54,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:54,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:06:54,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818936785] [2023-11-25 00:06:54,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:54,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:06:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:06:54,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:06:54,048 INFO L87 Difference]: Start difference. First operand 11429 states and 17899 transitions. Second operand has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-25 00:06:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:55,358 INFO L93 Difference]: Finished difference Result 16360 states and 25696 transitions. [2023-11-25 00:06:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-25 00:06:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 136 [2023-11-25 00:06:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:55,437 INFO L225 Difference]: With dead ends: 16360 [2023-11-25 00:06:55,437 INFO L226 Difference]: Without dead ends: 11506 [2023-11-25 00:06:55,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:06:55,469 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 459 mSDsluCounter, 3684 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 4345 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:55,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 4345 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-25 00:06:55,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11506 states. [2023-11-25 00:06:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 11481. [2023-11-25 00:06:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11481 states, 8187 states have (on average 1.490289483327226) internal successors, (12201), 8662 states have internal predecessors, (12201), 2490 states have call successors, (2490), 739 states have call predecessors, (2490), 803 states have return successors, (3256), 2307 states have call predecessors, (3256), 2478 states have call successors, (3256) [2023-11-25 00:06:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11481 states to 11481 states and 17947 transitions. [2023-11-25 00:06:56,680 INFO L78 Accepts]: Start accepts. Automaton has 11481 states and 17947 transitions. Word has length 136 [2023-11-25 00:06:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:56,683 INFO L495 AbstractCegarLoop]: Abstraction has 11481 states and 17947 transitions. [2023-11-25 00:06:56,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-25 00:06:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 11481 states and 17947 transitions. [2023-11-25 00:06:56,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-25 00:06:56,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:56,691 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:56,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-25 00:06:56,691 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:56,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash -833435551, now seen corresponding path program 1 times [2023-11-25 00:06:56,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:56,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824718101] [2023-11-25 00:06:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-25 00:06:57,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:57,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824718101] [2023-11-25 00:06:57,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824718101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:57,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:57,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-25 00:06:57,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279823111] [2023-11-25 00:06:57,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:57,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:06:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:06:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:06:57,727 INFO L87 Difference]: Start difference. First operand 11481 states and 17947 transitions. Second operand has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24)