./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/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_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/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_52218ddb-a1c1-44d7-90b8-f45003df0df1/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 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:49:22,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:49:22,908 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:49:22,914 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:49:22,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:49:22,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:49:22,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:49:22,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:49:22,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:49:22,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:49:22,952 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:49:22,953 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:49:22,954 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:49:22,955 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:49:22,956 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:49:22,957 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:49:22,958 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:49:22,959 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:49:22,960 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:49:22,961 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:49:22,966 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:49:22,967 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:49:22,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:49:22,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:49:22,980 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:49:22,981 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:49:22,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:49:22,982 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:49:22,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:49:22,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:49:22,985 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:49:22,986 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:49:22,986 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:49:22,987 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:49:22,987 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:49:22,987 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:49:22,988 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:49:22,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:22,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:49:22,990 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:49:22,990 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:49:22,991 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:49:22,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:49:22,992 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:49:22,993 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:49:22,993 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:49:22,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:49:22,994 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_52218ddb-a1c1-44d7-90b8-f45003df0df1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f67cb4d69b9f8349c20986099ec654a7bad708130567f012247d97f1e51ceb8 [2023-11-24 23:49:23,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:49:23,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:49:23,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:49:23,352 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:49:23,352 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:49:23,354 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2023-11-24 23:49:26,860 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:49:27,313 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:49:27,314 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c [2023-11-24 23:49:27,341 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/data/0ad4f2a8b/dc249e14f65d450bbf099639068fbb39/FLAGfda639129 [2023-11-24 23:49:27,364 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/data/0ad4f2a8b/dc249e14f65d450bbf099639068fbb39 [2023-11-24 23:49:27,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:49:27,374 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:49:27,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:27,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:49:27,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:49:27,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:27" (1/1) ... [2023-11-24 23:49:27,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24384f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:27, skipping insertion in model container [2023-11-24 23:49:27,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:49:27" (1/1) ... [2023-11-24 23:49:27,506 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:49:27,802 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_52218ddb-a1c1-44d7-90b8-f45003df0df1/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2023-11-24 23:49:28,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:28,347 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:49:28,361 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-11-24 23:49:28,364 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [57] [2023-11-24 23:49:28,364 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [730] [2023-11-24 23:49:28,365 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [1096] [2023-11-24 23:49:28,365 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1282] [2023-11-24 23:49:28,365 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2778] [2023-11-24 23:49:28,366 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2897] [2023-11-24 23:49:28,366 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2989] [2023-11-24 23:49:28,366 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3027] [2023-11-24 23:49:28,367 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [3043] [2023-11-24 23:49:28,372 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_52218ddb-a1c1-44d7-90b8-f45003df0df1/sv-benchmarks/c/product-lines/elevator_spec1_product18.cil.c[1545,1558] [2023-11-24 23:49:28,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:49:28,582 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:49:28,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28 WrapperNode [2023-11-24 23:49:28,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:49:28,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:28,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:49:28,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:49:28,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,716 INFO L138 Inliner]: procedures = 92, calls = 339, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 805 [2023-11-24 23:49:28,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:49:28,718 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:49:28,718 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:49:28,719 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:49:28,732 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,771 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,790 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,797 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,816 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:49:28,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:49:28,818 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:49:28,818 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:49:28,819 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (1/1) ... [2023-11-24 23:49:28,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:49:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:28,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:49:28,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:49:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-24 23:49:28,935 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-24 23:49:28,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:49:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-24 23:49:28,936 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-24 23:49:28,936 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-24 23:49:28,936 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-24 23:49:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:49:28,937 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:49:28,937 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:49:28,938 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:49:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:49:28,938 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:49:28,938 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:49:28,939 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:49:28,939 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:49:28,940 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:49:28,941 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-24 23:49:28,941 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-24 23:49:28,941 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:49:28,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:49:28,941 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:49:28,942 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:49:28,942 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:49:28,942 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:49:28,942 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:49:28,943 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:49:28,943 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:49:28,943 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:49:28,943 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:49:28,944 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:49:28,944 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:49:28,944 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:49:28,944 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:49:28,945 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:49:28,945 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:49:28,945 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:49:28,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:49:28,945 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2023-11-24 23:49:28,946 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2023-11-24 23:49:28,946 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:49:28,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:49:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:49:28,947 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:49:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:49:28,947 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:49:28,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:49:28,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:49:28,948 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:49:28,948 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:49:29,142 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:49:29,146 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:49:30,929 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:49:32,323 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:49:32,323 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:49:32,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:49:32 BoogieIcfgContainer [2023-11-24 23:49:32,326 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:49:32,329 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:49:32,329 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:49:32,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:49:32,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:49:27" (1/3) ... [2023-11-24 23:49:32,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac97456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:49:32, skipping insertion in model container [2023-11-24 23:49:32,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:49:28" (2/3) ... [2023-11-24 23:49:32,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac97456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:49:32, skipping insertion in model container [2023-11-24 23:49:32,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:49:32" (3/3) ... [2023-11-24 23:49:32,339 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product18.cil.c [2023-11-24 23:49:32,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:49:32,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:49:32,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:49:32,490 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;@b9492e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:49:32,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:49:32,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-24 23:49:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-24 23:49:32,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:32,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:32,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:32,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:32,554 INFO L85 PathProgramCache]: Analyzing trace with hash 189164373, now seen corresponding path program 1 times [2023-11-24 23:49:32,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:32,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118566145] [2023-11-24 23:49:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:32,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:49:33,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:33,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118566145] [2023-11-24 23:49:33,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118566145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:33,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:33,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:49:33,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549432720] [2023-11-24 23:49:33,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:33,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:49:33,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:33,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:49:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:49:33,403 INFO L87 Difference]: Start difference. First operand has 363 states, 244 states have (on average 1.610655737704918) internal successors, (393), 267 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-24 23:49:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:33,724 INFO L93 Difference]: Finished difference Result 381 states and 608 transitions. [2023-11-24 23:49:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:49:33,728 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 50 [2023-11-24 23:49:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:33,763 INFO L225 Difference]: With dead ends: 381 [2023-11-24 23:49:33,764 INFO L226 Difference]: Without dead ends: 359 [2023-11-24 23:49:33,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:49:33,776 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:33,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 539 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:49:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-11-24 23:49:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2023-11-24 23:49:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 242 states have (on average 1.5991735537190082) internal successors, (387), 263 states have internal predecessors, (387), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 86 states have call predecessors, (89), 89 states have call successors, (89) [2023-11-24 23:49:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 570 transitions. [2023-11-24 23:49:33,938 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 570 transitions. Word has length 50 [2023-11-24 23:49:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:33,942 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 570 transitions. [2023-11-24 23:49:33,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-24 23:49:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 570 transitions. [2023-11-24 23:49:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 23:49:33,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:33,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:33,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:49:33,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash -184720715, now seen corresponding path program 1 times [2023-11-24 23:49:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359916671] [2023-11-24 23:49:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:33,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:49:34,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:34,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359916671] [2023-11-24 23:49:34,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359916671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:34,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:34,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:49:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003292013] [2023-11-24 23:49:34,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:34,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:49:34,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:34,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:49:34,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:49:34,994 INFO L87 Difference]: Start difference. First operand 359 states and 570 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-24 23:49:38,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:38,076 INFO L93 Difference]: Finished difference Result 1163 states and 1893 transitions. [2023-11-24 23:49:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:49:38,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 51 [2023-11-24 23:49:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:38,102 INFO L225 Difference]: With dead ends: 1163 [2023-11-24 23:49:38,103 INFO L226 Difference]: Without dead ends: 827 [2023-11-24 23:49:38,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:49:38,121 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 1910 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:38,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1970 Valid, 730 Invalid, 1952 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [735 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-24 23:49:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2023-11-24 23:49:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 740. [2023-11-24 23:49:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 524 states have (on average 1.6278625954198473) internal successors, (853), 554 states have internal predecessors, (853), 177 states have call successors, (177), 37 states have call predecessors, (177), 38 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2023-11-24 23:49:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1209 transitions. [2023-11-24 23:49:38,234 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1209 transitions. Word has length 51 [2023-11-24 23:49:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:38,235 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1209 transitions. [2023-11-24 23:49:38,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 5 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-24 23:49:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1209 transitions. [2023-11-24 23:49:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-24 23:49:38,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:38,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:38,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:49:38,243 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:38,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash -624182888, now seen corresponding path program 1 times [2023-11-24 23:49:38,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:38,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843025217] [2023-11-24 23:49:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:38,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:49:39,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:39,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843025217] [2023-11-24 23:49:39,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843025217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:39,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:39,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 23:49:39,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189419913] [2023-11-24 23:49:39,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:39,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:49:39,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:39,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:49:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:49:39,125 INFO L87 Difference]: Start difference. First operand 740 states and 1209 transitions. Second operand has 9 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:49:43,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:43,447 INFO L93 Difference]: Finished difference Result 2162 states and 3558 transitions. [2023-11-24 23:49:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 23:49:43,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 72 [2023-11-24 23:49:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:43,466 INFO L225 Difference]: With dead ends: 2162 [2023-11-24 23:49:43,466 INFO L226 Difference]: Without dead ends: 1445 [2023-11-24 23:49:43,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-24 23:49:43,484 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 935 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 2647 SdHoareTripleChecker+Invalid, 4936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:43,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 2647 Invalid, 4936 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [256 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-24 23:49:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2023-11-24 23:49:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1427. [2023-11-24 23:49:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1008 states have (on average 1.6180555555555556) internal successors, (1631), 1059 states have internal predecessors, (1631), 348 states have call successors, (348), 59 states have call predecessors, (348), 70 states have return successors, (367), 330 states have call predecessors, (367), 343 states have call successors, (367) [2023-11-24 23:49:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 2346 transitions. [2023-11-24 23:49:43,672 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 2346 transitions. Word has length 72 [2023-11-24 23:49:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:43,674 INFO L495 AbstractCegarLoop]: Abstraction has 1427 states and 2346 transitions. [2023-11-24 23:49:43,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:49:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 2346 transitions. [2023-11-24 23:49:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-24 23:49:43,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:43,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:43,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:49:43,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:43,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:43,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1803514659, now seen corresponding path program 1 times [2023-11-24 23:49:43,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:43,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684603697] [2023-11-24 23:49:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:43,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:49:44,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:44,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684603697] [2023-11-24 23:49:44,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684603697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:44,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:44,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:49:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819120109] [2023-11-24 23:49:44,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:44,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:49:44,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:49:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:49:44,331 INFO L87 Difference]: Start difference. First operand 1427 states and 2346 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:49:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:47,494 INFO L93 Difference]: Finished difference Result 4108 states and 6779 transitions. [2023-11-24 23:49:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 23:49:47,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 73 [2023-11-24 23:49:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:47,522 INFO L225 Difference]: With dead ends: 4108 [2023-11-24 23:49:47,523 INFO L226 Difference]: Without dead ends: 2706 [2023-11-24 23:49:47,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:49:47,539 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 1644 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 2296 mSolverCounterSat, 497 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1707 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 2793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 2296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:47,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1707 Valid, 1688 Invalid, 2793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 2296 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-24 23:49:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2023-11-24 23:49:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2595. [2023-11-24 23:49:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 1885 states have (on average 1.6419098143236075) internal successors, (3095), 1967 states have internal predecessors, (3095), 576 states have call successors, (576), 110 states have call predecessors, (576), 133 states have return successors, (619), 550 states have call predecessors, (619), 571 states have call successors, (619) [2023-11-24 23:49:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 4290 transitions. [2023-11-24 23:49:47,804 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 4290 transitions. Word has length 73 [2023-11-24 23:49:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:47,804 INFO L495 AbstractCegarLoop]: Abstraction has 2595 states and 4290 transitions. [2023-11-24 23:49:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:49:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 4290 transitions. [2023-11-24 23:49:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-24 23:49:47,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:47,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:47,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:49:47,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:47,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:47,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1845407734, now seen corresponding path program 1 times [2023-11-24 23:49:47,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:47,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248115218] [2023-11-24 23:49:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:47,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:49:48,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:48,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248115218] [2023-11-24 23:49:48,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248115218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:48,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:48,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:49:48,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166005569] [2023-11-24 23:49:48,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:48,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:49:48,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:48,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:49:48,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:49:48,163 INFO L87 Difference]: Start difference. First operand 2595 states and 4290 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:49:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:48,504 INFO L93 Difference]: Finished difference Result 4547 states and 7523 transitions. [2023-11-24 23:49:48,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:49:48,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 77 [2023-11-24 23:49:48,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:48,530 INFO L225 Difference]: With dead ends: 4547 [2023-11-24 23:49:48,531 INFO L226 Difference]: Without dead ends: 2659 [2023-11-24 23:49:48,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:49:48,569 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 7 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2119 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:48,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2119 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:49:48,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2023-11-24 23:49:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2635. [2023-11-24 23:49:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1915 states have (on average 1.6318537859007833) internal successors, (3125), 1997 states have internal predecessors, (3125), 576 states have call successors, (576), 110 states have call predecessors, (576), 143 states have return successors, (639), 560 states have call predecessors, (639), 571 states have call successors, (639) [2023-11-24 23:49:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4340 transitions. [2023-11-24 23:49:48,792 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4340 transitions. Word has length 77 [2023-11-24 23:49:48,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:48,793 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4340 transitions. [2023-11-24 23:49:48,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:49:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4340 transitions. [2023-11-24 23:49:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-24 23:49:48,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:48,797 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:48,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:49:48,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:48,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:48,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1017437042, now seen corresponding path program 1 times [2023-11-24 23:49:48,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:48,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75224505] [2023-11-24 23:49:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:48,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:49:49,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:49,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75224505] [2023-11-24 23:49:49,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75224505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:49,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:49,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:49:49,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141938502] [2023-11-24 23:49:49,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:49,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:49:49,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:49:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:49:49,323 INFO L87 Difference]: Start difference. First operand 2635 states and 4340 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-24 23:49:51,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:51,806 INFO L93 Difference]: Finished difference Result 6397 states and 10536 transitions. [2023-11-24 23:49:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:49:51,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2023-11-24 23:49:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:51,847 INFO L225 Difference]: With dead ends: 6397 [2023-11-24 23:49:51,847 INFO L226 Difference]: Without dead ends: 4277 [2023-11-24 23:49:51,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:49:51,863 INFO L413 NwaCegarLoop]: 497 mSDtfsCounter, 1954 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2102 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:51,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2102 Valid, 1247 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-24 23:49:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2023-11-24 23:49:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 4169. [2023-11-24 23:49:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 2973 states have (on average 1.5876219307097208) internal successors, (4720), 3112 states have internal predecessors, (4720), 943 states have call successors, (943), 195 states have call predecessors, (943), 252 states have return successors, (1072), 916 states have call predecessors, (1072), 938 states have call successors, (1072) [2023-11-24 23:49:52,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 6735 transitions. [2023-11-24 23:49:52,353 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 6735 transitions. Word has length 81 [2023-11-24 23:49:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:52,354 INFO L495 AbstractCegarLoop]: Abstraction has 4169 states and 6735 transitions. [2023-11-24 23:49:52,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 6 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-24 23:49:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 6735 transitions. [2023-11-24 23:49:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-24 23:49:52,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:52,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:52,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:49:52,359 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:52,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash 431486518, now seen corresponding path program 1 times [2023-11-24 23:49:52,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:52,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125410189] [2023-11-24 23:49:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:52,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:49:52,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:52,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125410189] [2023-11-24 23:49:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125410189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:52,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:52,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:49:52,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335769184] [2023-11-24 23:49:52,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:52,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:49:52,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:52,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:49:52,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:49:52,714 INFO L87 Difference]: Start difference. First operand 4169 states and 6735 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-24 23:49:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:53,239 INFO L93 Difference]: Finished difference Result 8363 states and 13743 transitions. [2023-11-24 23:49:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:49:53,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2023-11-24 23:49:53,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:53,272 INFO L225 Difference]: With dead ends: 8363 [2023-11-24 23:49:53,272 INFO L226 Difference]: Without dead ends: 4169 [2023-11-24 23:49:53,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:49:53,297 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 221 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:53,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2007 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:49:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2023-11-24 23:49:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 4169. [2023-11-24 23:49:53,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 2973 states have (on average 1.5472586612848973) internal successors, (4600), 3112 states have internal predecessors, (4600), 943 states have call successors, (943), 195 states have call predecessors, (943), 252 states have return successors, (1072), 916 states have call predecessors, (1072), 938 states have call successors, (1072) [2023-11-24 23:49:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 6615 transitions. [2023-11-24 23:49:53,679 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 6615 transitions. Word has length 84 [2023-11-24 23:49:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:53,680 INFO L495 AbstractCegarLoop]: Abstraction has 4169 states and 6615 transitions. [2023-11-24 23:49:53,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-24 23:49:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 6615 transitions. [2023-11-24 23:49:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-24 23:49:53,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:53,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:53,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:49:53,690 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:53,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:53,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2012535365, now seen corresponding path program 1 times [2023-11-24 23:49:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:53,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146217705] [2023-11-24 23:49:53,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:53,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:49:54,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:54,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146217705] [2023-11-24 23:49:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146217705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:54,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:54,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:49:54,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273736635] [2023-11-24 23:49:54,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:54,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:49:54,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:54,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:49:54,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:49:54,242 INFO L87 Difference]: Start difference. First operand 4169 states and 6615 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-24 23:49:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:56,540 INFO L93 Difference]: Finished difference Result 8254 states and 13127 transitions. [2023-11-24 23:49:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:49:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 86 [2023-11-24 23:49:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:56,579 INFO L225 Difference]: With dead ends: 8254 [2023-11-24 23:49:56,579 INFO L226 Difference]: Without dead ends: 4714 [2023-11-24 23:49:56,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:49:56,599 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 931 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:56,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1580 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-24 23:49:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2023-11-24 23:49:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 4259. [2023-11-24 23:49:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 3033 states have (on average 1.5410484668644906) internal successors, (4674), 3186 states have internal predecessors, (4674), 945 states have call successors, (945), 211 states have call predecessors, (945), 280 states have return successors, (1110), 916 states have call predecessors, (1110), 940 states have call successors, (1110) [2023-11-24 23:49:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 6729 transitions. [2023-11-24 23:49:57,093 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 6729 transitions. Word has length 86 [2023-11-24 23:49:57,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:57,094 INFO L495 AbstractCegarLoop]: Abstraction has 4259 states and 6729 transitions. [2023-11-24 23:49:57,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-24 23:49:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 6729 transitions. [2023-11-24 23:49:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-24 23:49:57,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:57,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:57,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:49:57,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:57,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:57,099 INFO L85 PathProgramCache]: Analyzing trace with hash -970803996, now seen corresponding path program 1 times [2023-11-24 23:49:57,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:57,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650430547] [2023-11-24 23:49:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:57,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 23:49:57,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:57,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650430547] [2023-11-24 23:49:57,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650430547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:57,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:57,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:49:57,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674122410] [2023-11-24 23:49:57,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:57,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:49:57,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:49:57,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:49:57,465 INFO L87 Difference]: Start difference. First operand 4259 states and 6729 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-24 23:49:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:58,194 INFO L93 Difference]: Finished difference Result 4361 states and 6897 transitions. [2023-11-24 23:49:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:49:58,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2023-11-24 23:49:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:58,235 INFO L225 Difference]: With dead ends: 4361 [2023-11-24 23:49:58,236 INFO L226 Difference]: Without dead ends: 4346 [2023-11-24 23:49:58,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:49:58,241 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 652 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:58,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 1382 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:49:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2023-11-24 23:49:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4265. [2023-11-24 23:49:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4265 states, 3039 states have (on average 1.539980256663376) internal successors, (4680), 3192 states have internal predecessors, (4680), 945 states have call successors, (945), 211 states have call predecessors, (945), 280 states have return successors, (1110), 916 states have call predecessors, (1110), 940 states have call successors, (1110) [2023-11-24 23:49:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4265 states to 4265 states and 6735 transitions. [2023-11-24 23:49:58,633 INFO L78 Accepts]: Start accepts. Automaton has 4265 states and 6735 transitions. Word has length 93 [2023-11-24 23:49:58,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:58,635 INFO L495 AbstractCegarLoop]: Abstraction has 4265 states and 6735 transitions. [2023-11-24 23:49:58,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-24 23:49:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4265 states and 6735 transitions. [2023-11-24 23:49:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-24 23:49:58,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:58,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:58,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:49:58,640 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:49:58,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:58,646 INFO L85 PathProgramCache]: Analyzing trace with hash 856252674, now seen corresponding path program 1 times [2023-11-24 23:49:58,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:58,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764530491] [2023-11-24 23:49:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:58,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:49:59,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:59,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764530491] [2023-11-24 23:49:59,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764530491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:59,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:59,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:49:59,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921849857] [2023-11-24 23:49:59,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:59,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:49:59,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:59,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:49:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:49:59,066 INFO L87 Difference]: Start difference. First operand 4265 states and 6735 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-24 23:49:59,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:59,953 INFO L93 Difference]: Finished difference Result 4466 states and 7025 transitions. [2023-11-24 23:49:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:49:59,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2023-11-24 23:49:59,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:59,978 INFO L225 Difference]: With dead ends: 4466 [2023-11-24 23:49:59,978 INFO L226 Difference]: Without dead ends: 4451 [2023-11-24 23:49:59,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:49:59,981 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 588 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:59,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 2521 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:49:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2023-11-24 23:50:00,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 4379. [2023-11-24 23:50:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 3117 states have (on average 1.5338466474173884) internal successors, (4781), 3270 states have internal predecessors, (4781), 969 states have call successors, (969), 223 states have call predecessors, (969), 292 states have return successors, (1151), 940 states have call predecessors, (1151), 964 states have call successors, (1151) [2023-11-24 23:50:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 6901 transitions. [2023-11-24 23:50:00,382 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 6901 transitions. Word has length 95 [2023-11-24 23:50:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:50:00,383 INFO L495 AbstractCegarLoop]: Abstraction has 4379 states and 6901 transitions. [2023-11-24 23:50:00,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-24 23:50:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 6901 transitions. [2023-11-24 23:50:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:50:00,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:50:00,387 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:50:00,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:50:00,387 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:50:00,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:50:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash -129550403, now seen corresponding path program 1 times [2023-11-24 23:50:00,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:50:00,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034124081] [2023-11-24 23:50:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:00,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:50:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 23:50:02,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:50:02,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034124081] [2023-11-24 23:50:02,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034124081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:50:02,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345616986] [2023-11-24 23:50:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:50:02,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:50:02,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:50:02,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:50:02,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52218ddb-a1c1-44d7-90b8-f45003df0df1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:50:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:50:03,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 2010 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 23:50:03,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:50:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:50:05,898 INFO L327 TraceCheckSpWp]: Computing backward predicates...