./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:17:08,130 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:17:08,218 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:17:08,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:17:08,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:17:08,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:17:08,252 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:17:08,252 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:17:08,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:17:08,254 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:17:08,254 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:17:08,255 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:17:08,255 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:17:08,256 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:17:08,256 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:17:08,257 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:17:08,257 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:17:08,258 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:17:08,258 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:17:08,259 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:17:08,259 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:17:08,260 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:17:08,261 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:17:08,261 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:17:08,262 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:17:08,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:17:08,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:17:08,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:17:08,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:17:08,264 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:17:08,264 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:17:08,265 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:17:08,265 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:17:08,265 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:17:08,265 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:17:08,266 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:17:08,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:08,266 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:17:08,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:17:08,267 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:17:08,267 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:17:08,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:17:08,268 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:17:08,268 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:17:08,268 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:17:08,268 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_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 [2023-11-19 05:17:08,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:17:08,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:17:08,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:17:08,568 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:17:08,568 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:17:08,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2023-11-19 05:17:11,532 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:17:11,905 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:17:11,906 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2023-11-19 05:17:11,944 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/data/8938ce3e1/6f367643a1e64b138786736012925966/FLAG3fd601db7 [2023-11-19 05:17:11,963 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/data/8938ce3e1/6f367643a1e64b138786736012925966 [2023-11-19 05:17:11,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:17:11,973 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:17:11,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:11,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:17:11,981 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:17:11,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:11" (1/1) ... [2023-11-19 05:17:11,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@765bac71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:11, skipping insertion in model container [2023-11-19 05:17:11,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:11" (1/1) ... [2023-11-19 05:17:12,124 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:17:12,566 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_acaa0960-0654-44da-9c01-9e2dcb56f882/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2023-11-19 05:17:12,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:12,716 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:17:12,734 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [48] [2023-11-19 05:17:12,735 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [150] [2023-11-19 05:17:12,735 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [164] [2023-11-19 05:17:12,736 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [284] [2023-11-19 05:17:12,736 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [322] [2023-11-19 05:17:12,737 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1825] [2023-11-19 05:17:12,737 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1834] [2023-11-19 05:17:12,737 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2200] [2023-11-19 05:17:12,738 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [2552] [2023-11-19 05:17:12,738 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2733] [2023-11-19 05:17:12,845 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_acaa0960-0654-44da-9c01-9e2dcb56f882/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2023-11-19 05:17:12,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:12,962 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:17:12,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12 WrapperNode [2023-11-19 05:17:12,963 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:12,965 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:12,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:17:12,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:17:12,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,007 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,101 INFO L138 Inliner]: procedures = 92, calls = 338, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 816 [2023-11-19 05:17:13,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:13,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:17:13,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:17:13,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:17:13,122 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,141 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,162 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,178 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,189 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:17:13,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:17:13,199 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:17:13,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:17:13,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (1/1) ... [2023-11-19 05:17:13,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:13,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:17:13,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_acaa0960-0654-44da-9c01-9e2dcb56f882/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:17:13,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:17:13,314 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 05:17:13,314 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 05:17:13,314 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 05:17:13,315 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 05:17:13,315 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 05:17:13,316 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 05:17:13,317 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 05:17:13,317 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 05:17:13,317 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 05:17:13,318 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 05:17:13,318 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 05:17:13,318 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 05:17:13,319 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 05:17:13,319 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 05:17:13,319 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 05:17:13,319 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 05:17:13,319 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 05:17:13,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 05:17:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 05:17:13,320 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 05:17:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 05:17:13,320 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 05:17:13,320 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 05:17:13,321 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 05:17:13,321 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 05:17:13,321 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 05:17:13,321 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 05:17:13,321 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 05:17:13,321 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 05:17:13,322 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 05:17:13,322 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 05:17:13,322 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 05:17:13,322 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 05:17:13,322 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 05:17:13,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:17:13,322 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2023-11-19 05:17:13,323 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2023-11-19 05:17:13,323 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 05:17:13,323 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 05:17:13,323 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 05:17:13,323 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 05:17:13,323 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 05:17:13,324 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 05:17:13,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:17:13,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:17:13,324 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 05:17:13,324 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 05:17:13,484 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:17:13,487 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:17:14,748 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:17:15,658 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:17:15,659 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:17:15,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:15 BoogieIcfgContainer [2023-11-19 05:17:15,674 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:17:15,678 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:17:15,678 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:17:15,681 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:17:15,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:17:11" (1/3) ... [2023-11-19 05:17:15,682 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2665d2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:15, skipping insertion in model container [2023-11-19 05:17:15,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:12" (2/3) ... [2023-11-19 05:17:15,684 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2665d2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:15, skipping insertion in model container [2023-11-19 05:17:15,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:15" (3/3) ... [2023-11-19 05:17:15,686 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product18.cil.c [2023-11-19 05:17:15,706 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:17:15,706 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:17:15,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:17:15,794 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;@18c5ac05, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:17:15,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:17:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-19 05:17:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 05:17:15,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:15,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:15,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:15,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:15,826 INFO L85 PathProgramCache]: Analyzing trace with hash 907028854, now seen corresponding path program 1 times [2023-11-19 05:17:15,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:15,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326643818] [2023-11-19 05:17:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:15,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:16,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:16,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326643818] [2023-11-19 05:17:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326643818] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:16,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:16,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:17:16,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844999977] [2023-11-19 05:17:16,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:16,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:17:16,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:16,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:17:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:17:16,276 INFO L87 Difference]: Start difference. First operand has 356 states, 241 states have (on average 1.6182572614107884) internal successors, (390), 264 states have internal predecessors, (390), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 05:17:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:16,462 INFO L93 Difference]: Finished difference Result 374 states and 599 transitions. [2023-11-19 05:17:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:17:16,464 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2023-11-19 05:17:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:16,492 INFO L225 Difference]: With dead ends: 374 [2023-11-19 05:17:16,492 INFO L226 Difference]: Without dead ends: 352 [2023-11-19 05:17:16,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:17:16,501 INFO L413 NwaCegarLoop]: 530 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, 530 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:16,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 530 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-11-19 05:17:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2023-11-19 05:17:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 239 states have (on average 1.606694560669456) internal successors, (384), 260 states have internal predecessors, (384), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-19 05:17:16,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 561 transitions. [2023-11-19 05:17:16,604 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 561 transitions. Word has length 39 [2023-11-19 05:17:16,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:16,606 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 561 transitions. [2023-11-19 05:17:16,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 05:17:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 561 transitions. [2023-11-19 05:17:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 05:17:16,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:16,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:16,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:17:16,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:16,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:16,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2115609871, now seen corresponding path program 1 times [2023-11-19 05:17:16,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:16,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709367737] [2023-11-19 05:17:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:16,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:17,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:17,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709367737] [2023-11-19 05:17:17,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709367737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:17,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:17,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:17:17,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457849342] [2023-11-19 05:17:17,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:17,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:17:17,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:17:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:17:17,179 INFO L87 Difference]: Start difference. First operand 352 states and 561 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 05:17:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:19,221 INFO L93 Difference]: Finished difference Result 1156 states and 1884 transitions. [2023-11-19 05:17:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:19,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2023-11-19 05:17:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:19,240 INFO L225 Difference]: With dead ends: 1156 [2023-11-19 05:17:19,240 INFO L226 Difference]: Without dead ends: 820 [2023-11-19 05:17:19,252 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 [2023-11-19 05:17:19,256 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 1162 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:19,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 955 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 05:17:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2023-11-19 05:17:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 733. [2023-11-19 05:17:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 521 states have (on average 1.6314779270633397) internal successors, (850), 551 states have internal predecessors, (850), 174 states have call successors, (174), 36 states have call predecessors, (174), 37 states have return successors, (176), 158 states have call predecessors, (176), 169 states have call successors, (176) [2023-11-19 05:17:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1200 transitions. [2023-11-19 05:17:19,392 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1200 transitions. Word has length 40 [2023-11-19 05:17:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:19,393 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1200 transitions. [2023-11-19 05:17:19,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 05:17:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1200 transitions. [2023-11-19 05:17:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 05:17:19,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:19,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:19,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:17:19,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:19,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:19,413 INFO L85 PathProgramCache]: Analyzing trace with hash 384329549, now seen corresponding path program 1 times [2023-11-19 05:17:19,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:19,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841517091] [2023-11-19 05:17:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:19,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:20,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:20,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841517091] [2023-11-19 05:17:20,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841517091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:20,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:20,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 05:17:20,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68305856] [2023-11-19 05:17:20,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:20,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:17:20,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:20,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:17:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:17:20,050 INFO L87 Difference]: Start difference. First operand 733 states and 1200 transitions. Second operand has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:17:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:23,560 INFO L93 Difference]: Finished difference Result 2155 states and 3549 transitions. [2023-11-19 05:17:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 05:17:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2023-11-19 05:17:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:23,574 INFO L225 Difference]: With dead ends: 2155 [2023-11-19 05:17:23,574 INFO L226 Difference]: Without dead ends: 1438 [2023-11-19 05:17:23,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-19 05:17:23,580 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 929 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 4627 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 4872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 4627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:23,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 2646 Invalid, 4872 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [245 Valid, 4627 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 05:17:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2023-11-19 05:17:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1420. [2023-11-19 05:17:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1005 states have (on average 1.6199004975124378) internal successors, (1628), 1056 states have internal predecessors, (1628), 345 states have call successors, (345), 58 states have call predecessors, (345), 69 states have return successors, (364), 327 states have call predecessors, (364), 340 states have call successors, (364) [2023-11-19 05:17:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 2337 transitions. [2023-11-19 05:17:23,733 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 2337 transitions. Word has length 61 [2023-11-19 05:17:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:23,733 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 2337 transitions. [2023-11-19 05:17:23,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:17:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 2337 transitions. [2023-11-19 05:17:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-19 05:17:23,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:23,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:23,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:17:23,738 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:23,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:23,739 INFO L85 PathProgramCache]: Analyzing trace with hash 659747443, now seen corresponding path program 1 times [2023-11-19 05:17:23,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:23,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224511142] [2023-11-19 05:17:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:23,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:24,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:24,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224511142] [2023-11-19 05:17:24,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224511142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:24,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:24,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:17:24,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659878021] [2023-11-19 05:17:24,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:24,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:17:24,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:24,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:17:24,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:17:24,106 INFO L87 Difference]: Start difference. First operand 1420 states and 2337 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:17:26,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:26,624 INFO L93 Difference]: Finished difference Result 4101 states and 6770 transitions. [2023-11-19 05:17:26,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:17:26,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2023-11-19 05:17:26,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:26,651 INFO L225 Difference]: With dead ends: 4101 [2023-11-19 05:17:26,652 INFO L226 Difference]: Without dead ends: 2699 [2023-11-19 05:17:26,663 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 [2023-11-19 05:17:26,670 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 1637 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 2750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:26,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 1685 Invalid, 2750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 05:17:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2023-11-19 05:17:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2588. [2023-11-19 05:17:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 1882 states have (on average 1.642933049946865) internal successors, (3092), 1964 states have internal predecessors, (3092), 573 states have call successors, (573), 109 states have call predecessors, (573), 132 states have return successors, (616), 547 states have call predecessors, (616), 568 states have call successors, (616) [2023-11-19 05:17:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 4281 transitions. [2023-11-19 05:17:26,951 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 4281 transitions. Word has length 62 [2023-11-19 05:17:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:26,954 INFO L495 AbstractCegarLoop]: Abstraction has 2588 states and 4281 transitions. [2023-11-19 05:17:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:17:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 4281 transitions. [2023-11-19 05:17:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-19 05:17:26,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:26,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:26,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:17:26,961 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:26,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash -621981638, now seen corresponding path program 1 times [2023-11-19 05:17:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:26,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232688630] [2023-11-19 05:17:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:26,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:27,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:27,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232688630] [2023-11-19 05:17:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232688630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:27,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:17:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417880567] [2023-11-19 05:17:27,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:27,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:17:27,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:27,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:17:27,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:27,229 INFO L87 Difference]: Start difference. First operand 2588 states and 4281 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 05:17:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:27,602 INFO L93 Difference]: Finished difference Result 4540 states and 7514 transitions. [2023-11-19 05:17:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:17:27,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2023-11-19 05:17:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:27,628 INFO L225 Difference]: With dead ends: 4540 [2023-11-19 05:17:27,628 INFO L226 Difference]: Without dead ends: 2652 [2023-11-19 05:17:27,639 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 [2023-11-19 05:17:27,642 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 7 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2083 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 [2023-11-19 05:17:27,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 2083 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:17:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2023-11-19 05:17:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2628. [2023-11-19 05:17:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 1912 states have (on average 1.6328451882845187) internal successors, (3122), 1994 states have internal predecessors, (3122), 573 states have call successors, (573), 109 states have call predecessors, (573), 142 states have return successors, (636), 557 states have call predecessors, (636), 568 states have call successors, (636) [2023-11-19 05:17:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 4331 transitions. [2023-11-19 05:17:27,889 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 4331 transitions. Word has length 66 [2023-11-19 05:17:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:27,890 INFO L495 AbstractCegarLoop]: Abstraction has 2628 states and 4331 transitions. [2023-11-19 05:17:27,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 05:17:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 4331 transitions. [2023-11-19 05:17:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 05:17:27,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:27,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:27,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:17:27,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:27,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1020169314, now seen corresponding path program 1 times [2023-11-19 05:17:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:27,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025708055] [2023-11-19 05:17:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:27,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:28,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025708055] [2023-11-19 05:17:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025708055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:28,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 05:17:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523446740] [2023-11-19 05:17:28,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:28,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:17:28,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:17:28,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:17:28,334 INFO L87 Difference]: Start difference. First operand 2628 states and 4331 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 05:17:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:30,736 INFO L93 Difference]: Finished difference Result 6390 states and 10527 transitions. [2023-11-19 05:17:30,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:17:30,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 70 [2023-11-19 05:17:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:30,768 INFO L225 Difference]: With dead ends: 6390 [2023-11-19 05:17:30,769 INFO L226 Difference]: Without dead ends: 4270 [2023-11-19 05:17:30,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 05:17:30,781 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 1644 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1792 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:30,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1792 Valid, 1475 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 05:17:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2023-11-19 05:17:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 4162. [2023-11-19 05:17:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 2970 states have (on average 1.5882154882154882) internal successors, (4717), 3109 states have internal predecessors, (4717), 940 states have call successors, (940), 194 states have call predecessors, (940), 251 states have return successors, (1069), 913 states have call predecessors, (1069), 935 states have call successors, (1069) [2023-11-19 05:17:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 6726 transitions. [2023-11-19 05:17:31,169 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 6726 transitions. Word has length 70 [2023-11-19 05:17:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:31,170 INFO L495 AbstractCegarLoop]: Abstraction has 4162 states and 6726 transitions. [2023-11-19 05:17:31,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 8 states have internal predecessors, (47), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-19 05:17:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 6726 transitions. [2023-11-19 05:17:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-19 05:17:31,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:31,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:31,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:17:31,174 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:31,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:31,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1540961687, now seen corresponding path program 1 times [2023-11-19 05:17:31,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:31,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292573221] [2023-11-19 05:17:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:31,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:31,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:31,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292573221] [2023-11-19 05:17:31,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292573221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:31,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:31,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:17:31,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761175802] [2023-11-19 05:17:31,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:31,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:17:31,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:31,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:17:31,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:31,445 INFO L87 Difference]: Start difference. First operand 4162 states and 6726 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:17:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:31,946 INFO L93 Difference]: Finished difference Result 8356 states and 13734 transitions. [2023-11-19 05:17:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:17:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2023-11-19 05:17:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:32,054 INFO L225 Difference]: With dead ends: 8356 [2023-11-19 05:17:32,054 INFO L226 Difference]: Without dead ends: 4162 [2023-11-19 05:17:32,080 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 [2023-11-19 05:17:32,081 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 221 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1972 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 [2023-11-19 05:17:32,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1972 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:17:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2023-11-19 05:17:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 4162. [2023-11-19 05:17:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 2970 states have (on average 1.5478114478114477) internal successors, (4597), 3109 states have internal predecessors, (4597), 940 states have call successors, (940), 194 states have call predecessors, (940), 251 states have return successors, (1069), 913 states have call predecessors, (1069), 935 states have call successors, (1069) [2023-11-19 05:17:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 6606 transitions. [2023-11-19 05:17:32,512 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 6606 transitions. Word has length 73 [2023-11-19 05:17:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:32,512 INFO L495 AbstractCegarLoop]: Abstraction has 4162 states and 6606 transitions. [2023-11-19 05:17:32,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:17:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 6606 transitions. [2023-11-19 05:17:32,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 05:17:32,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:32,516 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:32,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:17:32,516 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:32,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash 188678975, now seen corresponding path program 1 times [2023-11-19 05:17:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:32,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637834852] [2023-11-19 05:17:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:17:32,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:32,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637834852] [2023-11-19 05:17:32,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637834852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:32,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:32,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:17:32,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770883991] [2023-11-19 05:17:32,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:32,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:17:32,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:32,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:17:32,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:17:32,938 INFO L87 Difference]: Start difference. First operand 4162 states and 6606 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 05:17:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:35,142 INFO L93 Difference]: Finished difference Result 8247 states and 13118 transitions. [2023-11-19 05:17:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 05:17:35,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2023-11-19 05:17:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:35,181 INFO L225 Difference]: With dead ends: 8247 [2023-11-19 05:17:35,181 INFO L226 Difference]: Without dead ends: 4707 [2023-11-19 05:17:35,201 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 [2023-11-19 05:17:35,203 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 924 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:35,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 1578 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 05:17:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2023-11-19 05:17:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4252. [2023-11-19 05:17:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4252 states, 3030 states have (on average 1.5415841584158416) internal successors, (4671), 3183 states have internal predecessors, (4671), 942 states have call successors, (942), 210 states have call predecessors, (942), 279 states have return successors, (1107), 913 states have call predecessors, (1107), 937 states have call successors, (1107) [2023-11-19 05:17:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 6720 transitions. [2023-11-19 05:17:35,680 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 6720 transitions. Word has length 75 [2023-11-19 05:17:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:35,680 INFO L495 AbstractCegarLoop]: Abstraction has 4252 states and 6720 transitions. [2023-11-19 05:17:35,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-19 05:17:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 6720 transitions. [2023-11-19 05:17:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-19 05:17:35,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:35,689 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] [2023-11-19 05:17:35,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 05:17:35,690 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:35,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:35,690 INFO L85 PathProgramCache]: Analyzing trace with hash 395247702, now seen corresponding path program 1 times [2023-11-19 05:17:35,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:35,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096736715] [2023-11-19 05:17:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:35,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:17:36,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:36,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096736715] [2023-11-19 05:17:36,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096736715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:36,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:36,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:17:36,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724193005] [2023-11-19 05:17:36,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:36,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:17:36,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:17:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:17:36,015 INFO L87 Difference]: Start difference. First operand 4252 states and 6720 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 05:17:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:36,851 INFO L93 Difference]: Finished difference Result 4354 states and 6888 transitions. [2023-11-19 05:17:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:17:36,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 79 [2023-11-19 05:17:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:36,897 INFO L225 Difference]: With dead ends: 4354 [2023-11-19 05:17:36,897 INFO L226 Difference]: Without dead ends: 4339 [2023-11-19 05:17:36,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:17:36,902 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 645 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:36,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1697 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:17:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2023-11-19 05:17:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 4258. [2023-11-19 05:17:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4258 states, 3036 states have (on average 1.540513833992095) internal successors, (4677), 3189 states have internal predecessors, (4677), 942 states have call successors, (942), 210 states have call predecessors, (942), 279 states have return successors, (1107), 913 states have call predecessors, (1107), 937 states have call successors, (1107) [2023-11-19 05:17:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4258 states to 4258 states and 6726 transitions. [2023-11-19 05:17:37,425 INFO L78 Accepts]: Start accepts. Automaton has 4258 states and 6726 transitions. Word has length 79 [2023-11-19 05:17:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:37,425 INFO L495 AbstractCegarLoop]: Abstraction has 4258 states and 6726 transitions. [2023-11-19 05:17:37,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-19 05:17:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4258 states and 6726 transitions. [2023-11-19 05:17:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 05:17:37,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:37,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 05:17:37,430 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:37,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1618416220, now seen corresponding path program 1 times [2023-11-19 05:17:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:37,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729266455] [2023-11-19 05:17:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:37,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:17:37,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:37,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729266455] [2023-11-19 05:17:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729266455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:37,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:17:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43688385] [2023-11-19 05:17:37,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:37,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:17:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:17:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:17:37,748 INFO L87 Difference]: Start difference. First operand 4258 states and 6726 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:17:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:38,644 INFO L93 Difference]: Finished difference Result 4459 states and 7016 transitions. [2023-11-19 05:17:38,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 05:17:38,645 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 87 [2023-11-19 05:17:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:38,669 INFO L225 Difference]: With dead ends: 4459 [2023-11-19 05:17:38,669 INFO L226 Difference]: Without dead ends: 4444 [2023-11-19 05:17:38,672 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 [2023-11-19 05:17:38,673 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 580 mSDsluCounter, 1973 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:38,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 2486 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:17:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2023-11-19 05:17:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 4372. [2023-11-19 05:17:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 3114 states have (on average 1.5343609505459217) internal successors, (4778), 3267 states have internal predecessors, (4778), 966 states have call successors, (966), 222 states have call predecessors, (966), 291 states have return successors, (1148), 937 states have call predecessors, (1148), 961 states have call successors, (1148) [2023-11-19 05:17:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 6892 transitions. [2023-11-19 05:17:39,091 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 6892 transitions. Word has length 87 [2023-11-19 05:17:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:39,093 INFO L495 AbstractCegarLoop]: Abstraction has 4372 states and 6892 transitions. [2023-11-19 05:17:39,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:17:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 6892 transitions. [2023-11-19 05:17:39,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 05:17:39,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:39,097 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:39,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 05:17:39,098 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:39,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash -596029509, now seen corresponding path program 1 times [2023-11-19 05:17:39,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:39,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56497246] [2023-11-19 05:17:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:39,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:17:39,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:39,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56497246] [2023-11-19 05:17:39,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56497246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:39,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:39,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:39,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446711246] [2023-11-19 05:17:39,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:39,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:17:39,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:17:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:39,460 INFO L87 Difference]: Start difference. First operand 4372 states and 6892 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:17:41,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:41,564 INFO L93 Difference]: Finished difference Result 11794 states and 18970 transitions. [2023-11-19 05:17:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:17:41,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 91 [2023-11-19 05:17:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:41,610 INFO L225 Difference]: With dead ends: 11794 [2023-11-19 05:17:41,611 INFO L226 Difference]: Without dead ends: 7438 [2023-11-19 05:17:41,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:41,641 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1086 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:41,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 673 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 05:17:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2023-11-19 05:17:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 6845. [2023-11-19 05:17:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6845 states, 4882 states have (on average 1.529291274068005) internal successors, (7466), 5136 states have internal predecessors, (7466), 1494 states have call successors, (1494), 338 states have call predecessors, (1494), 468 states have return successors, (1899), 1445 states have call predecessors, (1899), 1489 states have call successors, (1899) [2023-11-19 05:17:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6845 states to 6845 states and 10859 transitions. [2023-11-19 05:17:42,490 INFO L78 Accepts]: Start accepts. Automaton has 6845 states and 10859 transitions. Word has length 91 [2023-11-19 05:17:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:42,490 INFO L495 AbstractCegarLoop]: Abstraction has 6845 states and 10859 transitions. [2023-11-19 05:17:42,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:17:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6845 states and 10859 transitions. [2023-11-19 05:17:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 05:17:42,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:42,496 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:42,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:17:42,496 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:42,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:42,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1297174769, now seen corresponding path program 1 times [2023-11-19 05:17:42,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:42,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111879529] [2023-11-19 05:17:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:42,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:17:42,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:42,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111879529] [2023-11-19 05:17:42,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111879529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:42,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:42,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161659724] [2023-11-19 05:17:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:17:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:17:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:42,818 INFO L87 Difference]: Start difference. First operand 6845 states and 10859 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:17:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:45,109 INFO L93 Difference]: Finished difference Result 19151 states and 31340 transitions. [2023-11-19 05:17:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:17:45,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 92 [2023-11-19 05:17:45,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:45,193 INFO L225 Difference]: With dead ends: 19151 [2023-11-19 05:17:45,194 INFO L226 Difference]: Without dead ends: 12325 [2023-11-19 05:17:45,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:45,226 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 1073 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:45,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 686 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 05:17:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12325 states. [2023-11-19 05:17:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12325 to 11563. [2023-11-19 05:17:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11563 states, 8258 states have (on average 1.5254298861709856) internal successors, (12597), 8739 states have internal predecessors, (12597), 2477 states have call successors, (2477), 570 states have call predecessors, (2477), 827 states have return successors, (3524), 2378 states have call predecessors, (3524), 2472 states have call successors, (3524) [2023-11-19 05:17:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11563 states to 11563 states and 18598 transitions. [2023-11-19 05:17:46,551 INFO L78 Accepts]: Start accepts. Automaton has 11563 states and 18598 transitions. Word has length 92 [2023-11-19 05:17:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:46,551 INFO L495 AbstractCegarLoop]: Abstraction has 11563 states and 18598 transitions. [2023-11-19 05:17:46,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-19 05:17:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 11563 states and 18598 transitions. [2023-11-19 05:17:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-19 05:17:46,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:46,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:46,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 05:17:46,556 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:46,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash -564840799, now seen corresponding path program 1 times [2023-11-19 05:17:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:46,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265864598] [2023-11-19 05:17:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:17:46,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:46,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265864598] [2023-11-19 05:17:46,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265864598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:46,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:46,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:46,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818575454] [2023-11-19 05:17:46,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:46,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:17:46,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:17:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:17:46,856 INFO L87 Difference]: Start difference. First operand 11563 states and 18598 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 05:17:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:50,452 INFO L93 Difference]: Finished difference Result 33593 states and 56858 transitions. [2023-11-19 05:17:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:17:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2023-11-19 05:17:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:50,587 INFO L225 Difference]: With dead ends: 33593 [2023-11-19 05:17:50,587 INFO L226 Difference]: Without dead ends: 22055 [2023-11-19 05:17:50,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:50,649 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1054 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:50,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 699 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 05:17:50,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22055 states. [2023-11-19 05:17:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22055 to 20906. [2023-11-19 05:17:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20906 states, 14925 states have (on average 1.5195309882747068) internal successors, (22679), 15890 states have internal predecessors, (22679), 4405 states have call successors, (4405), 1034 states have call predecessors, (4405), 1575 states have return successors, (7444), 4206 states have call predecessors, (7444), 4400 states have call successors, (7444) [2023-11-19 05:17:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20906 states to 20906 states and 34528 transitions. [2023-11-19 05:17:53,010 INFO L78 Accepts]: Start accepts. Automaton has 20906 states and 34528 transitions. Word has length 96 [2023-11-19 05:17:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:53,011 INFO L495 AbstractCegarLoop]: Abstraction has 20906 states and 34528 transitions. [2023-11-19 05:17:53,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-19 05:17:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 20906 states and 34528 transitions. [2023-11-19 05:17:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-19 05:17:53,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:53,016 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:53,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 05:17:53,016 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:53,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1048441839, now seen corresponding path program 1 times [2023-11-19 05:17:53,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:53,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978745547] [2023-11-19 05:17:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat