./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/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_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/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_41df9442-50d3-49a6-adf7-fb8a6b608c74/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 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:59:31,513 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:59:31,587 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:59:31,593 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:59:31,594 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:59:31,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:59:31,622 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:59:31,622 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:59:31,623 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:59:31,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:59:31,624 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:59:31,625 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:59:31,626 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:59:31,626 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:59:31,627 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:59:31,627 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:59:31,628 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:59:31,628 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:59:31,629 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:59:31,630 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:59:31,630 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:59:31,631 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:59:31,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:59:31,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:59:31,633 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:59:31,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:59:31,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:59:31,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:59:31,636 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:59:31,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:59:31,637 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:59:31,637 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:59:31,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:59:31,638 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:59:31,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:59:31,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:59:31,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:59:31,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:59:31,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:59:31,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:59:31,641 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:59:31,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:59:31,641 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:59:31,642 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:59:31,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:59:31,642 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_41df9442-50d3-49a6-adf7-fb8a6b608c74/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68864d90c2581c7e2b9a72172352bcf9279d03107788434bd4ac5af6cc5db51a [2023-11-19 04:59:31,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:59:31,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:59:31,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:59:31,953 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:59:31,954 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:59:31,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2023-11-19 04:59:35,166 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:59:35,582 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:59:35,583 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c [2023-11-19 04:59:35,617 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/data/5a5462aeb/5cc8babdb998445f84d1e0445104a6f2/FLAG18137bd5a [2023-11-19 04:59:35,635 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/data/5a5462aeb/5cc8babdb998445f84d1e0445104a6f2 [2023-11-19 04:59:35,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:59:35,647 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:59:35,651 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:59:35,651 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:59:35,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:59:35,658 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:59:35" (1/1) ... [2023-11-19 04:59:35,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bdfd3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:35, skipping insertion in model container [2023-11-19 04:59:35,659 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:59:35" (1/1) ... [2023-11-19 04:59:35,752 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:59:36,087 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_41df9442-50d3-49a6-adf7-fb8a6b608c74/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2023-11-19 04:59:36,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:59:36,307 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:59:36,318 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification9_spec.i","") [48] [2023-11-19 04:59:36,320 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [213] [2023-11-19 04:59:36,320 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [334] [2023-11-19 04:59:36,321 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [432] [2023-11-19 04:59:36,321 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [446] [2023-11-19 04:59:36,321 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [812] [2023-11-19 04:59:36,322 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1166] [2023-11-19 04:59:36,323 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1175] [2023-11-19 04:59:36,323 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1842] [2023-11-19 04:59:36,324 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1877] [2023-11-19 04:59:36,380 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_41df9442-50d3-49a6-adf7-fb8a6b608c74/sv-benchmarks/c/product-lines/elevator_spec9_product25.cil.c[23488,23501] [2023-11-19 04:59:36,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:59:36,477 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:59:36,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36 WrapperNode [2023-11-19 04:59:36,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:59:36,479 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:59:36,479 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:59:36,479 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:59:36,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,526 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,631 INFO L138 Inliner]: procedures = 91, calls = 331, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 804 [2023-11-19 04:59:36,643 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:59:36,643 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:59:36,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:59:36,644 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:59:36,654 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,661 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,708 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,736 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,741 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,763 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,787 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:59:36,788 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:59:36,788 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:59:36,788 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:59:36,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (1/1) ... [2023-11-19 04:59:36,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:59:36,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:36,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:59:36,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:59:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:59:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 04:59:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 04:59:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 04:59:36,869 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 04:59:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 04:59:36,869 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 04:59:36,870 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 04:59:36,870 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 04:59:36,870 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 04:59:36,871 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 04:59:36,871 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:59:36,872 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:59:36,872 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:59:36,873 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:59:36,873 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 04:59:36,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 04:59:36,874 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 04:59:36,876 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 04:59:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 04:59:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 04:59:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 04:59:36,877 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 04:59:36,877 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 04:59:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 04:59:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 04:59:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 04:59:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 04:59:36,878 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 04:59:36,878 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 04:59:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 04:59:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 04:59:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 04:59:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-11-19 04:59:36,879 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-11-19 04:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 04:59:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 04:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 04:59:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 04:59:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 04:59:36,880 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 04:59:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:59:36,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:59:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 04:59:36,881 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 04:59:37,106 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:59:37,109 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:59:38,399 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:59:39,386 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:59:39,387 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:59:39,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:59:39 BoogieIcfgContainer [2023-11-19 04:59:39,406 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:59:39,409 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:59:39,409 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:59:39,413 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:59:39,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:59:35" (1/3) ... [2023-11-19 04:59:39,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3103691b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:59:39, skipping insertion in model container [2023-11-19 04:59:39,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:59:36" (2/3) ... [2023-11-19 04:59:39,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3103691b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:59:39, skipping insertion in model container [2023-11-19 04:59:39,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:59:39" (3/3) ... [2023-11-19 04:59:39,418 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product25.cil.c [2023-11-19 04:59:39,440 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:59:39,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:59:39,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:59:39,532 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;@4251a4bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:59:39,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:59:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 338 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 251 states have internal predecessors, (373), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-19 04:59:39,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 04:59:39,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:39,562 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] [2023-11-19 04:59:39,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:39,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash 508641909, now seen corresponding path program 1 times [2023-11-19 04:59:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:39,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783761957] [2023-11-19 04:59:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:39,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:40,205 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 04:59:40,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:40,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783761957] [2023-11-19 04:59:40,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783761957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:40,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:40,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:59:40,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595312536] [2023-11-19 04:59:40,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:59:40,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:40,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:59:40,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:59:40,270 INFO L87 Difference]: Start difference. First operand has 338 states, 230 states have (on average 1.6217391304347826) internal successors, (373), 251 states have internal predecessors, (373), 85 states have call successors, (85), 21 states have call predecessors, (85), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-19 04:59:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:40,510 INFO L93 Difference]: Finished difference Result 356 states and 570 transitions. [2023-11-19 04:59:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:59:40,513 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 51 [2023-11-19 04:59:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:40,544 INFO L225 Difference]: With dead ends: 356 [2023-11-19 04:59:40,544 INFO L226 Difference]: Without dead ends: 334 [2023-11-19 04:59:40,548 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 04:59:40,553 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:40,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 499 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:59:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-19 04:59:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2023-11-19 04:59:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 228 states have (on average 1.6096491228070176) internal successors, (367), 247 states have internal predecessors, (367), 85 states have call successors, (85), 21 states have call predecessors, (85), 20 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 04:59:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 532 transitions. [2023-11-19 04:59:40,640 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 532 transitions. Word has length 51 [2023-11-19 04:59:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:40,641 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 532 transitions. [2023-11-19 04:59:40,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2023-11-19 04:59:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 532 transitions. [2023-11-19 04:59:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 04:59:40,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:40,649 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] [2023-11-19 04:59:40,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:59:40,650 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:40,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:40,650 INFO L85 PathProgramCache]: Analyzing trace with hash 607327324, now seen corresponding path program 1 times [2023-11-19 04:59:40,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:40,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230421849] [2023-11-19 04:59:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:40,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:41,182 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 04:59:41,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:41,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230421849] [2023-11-19 04:59:41,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230421849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:41,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:41,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:59:41,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259413134] [2023-11-19 04:59:41,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:41,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:59:41,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:59:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:59:41,191 INFO L87 Difference]: Start difference. First operand 334 states and 532 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-19 04:59:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:43,898 INFO L93 Difference]: Finished difference Result 1111 states and 1803 transitions. [2023-11-19 04:59:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:59:43,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 52 [2023-11-19 04:59:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:43,911 INFO L225 Difference]: With dead ends: 1111 [2023-11-19 04:59:43,912 INFO L226 Difference]: Without dead ends: 793 [2023-11-19 04:59:43,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 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 04:59:43,931 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 1589 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 2184 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 2184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:43,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 1389 Invalid, 2649 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [465 Valid, 2184 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-19 04:59:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2023-11-19 04:59:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 755. [2023-11-19 04:59:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 536 states have (on average 1.6399253731343284) internal successors, (879), 571 states have internal predecessors, (879), 175 states have call successors, (175), 41 states have call predecessors, (175), 43 states have return successors, (176), 167 states have call predecessors, (176), 170 states have call successors, (176) [2023-11-19 04:59:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1230 transitions. [2023-11-19 04:59:44,089 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1230 transitions. Word has length 52 [2023-11-19 04:59:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:44,089 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1230 transitions. [2023-11-19 04:59:44,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-19 04:59:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1230 transitions. [2023-11-19 04:59:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 04:59:44,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:44,095 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] [2023-11-19 04:59:44,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:59:44,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:44,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 889317747, now seen corresponding path program 1 times [2023-11-19 04:59:44,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:44,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144527579] [2023-11-19 04:59:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:44,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:44,337 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 04:59:44,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:44,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144527579] [2023-11-19 04:59:44,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144527579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:44,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:44,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:59:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837921039] [2023-11-19 04:59:44,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:44,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:59:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:59:44,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:59:44,341 INFO L87 Difference]: Start difference. First operand 755 states and 1230 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 04:59:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:44,582 INFO L93 Difference]: Finished difference Result 1249 states and 2039 transitions. [2023-11-19 04:59:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:59:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 56 [2023-11-19 04:59:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:44,612 INFO L225 Difference]: With dead ends: 1249 [2023-11-19 04:59:44,612 INFO L226 Difference]: Without dead ends: 803 [2023-11-19 04:59:44,615 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 04:59:44,616 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 30 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2023 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:44,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2023 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:59:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-19 04:59:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 767. [2023-11-19 04:59:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 545 states have (on average 1.6293577981651377) internal successors, (888), 580 states have internal predecessors, (888), 175 states have call successors, (175), 41 states have call predecessors, (175), 46 states have return successors, (182), 170 states have call predecessors, (182), 170 states have call successors, (182) [2023-11-19 04:59:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1245 transitions. [2023-11-19 04:59:44,686 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1245 transitions. Word has length 56 [2023-11-19 04:59:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:44,687 INFO L495 AbstractCegarLoop]: Abstraction has 767 states and 1245 transitions. [2023-11-19 04:59:44,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-19 04:59:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1245 transitions. [2023-11-19 04:59:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 04:59:44,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:44,690 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] [2023-11-19 04:59:44,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:59:44,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:44,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -12940773, now seen corresponding path program 1 times [2023-11-19 04:59:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:44,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964172575] [2023-11-19 04:59:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:44,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:45,078 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 04:59:45,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:45,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964172575] [2023-11-19 04:59:45,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964172575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:45,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:45,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:59:45,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404927877] [2023-11-19 04:59:45,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:45,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:59:45,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:45,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:59:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:59:45,082 INFO L87 Difference]: Start difference. First operand 767 states and 1245 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-19 04:59:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:47,351 INFO L93 Difference]: Finished difference Result 1713 states and 2771 transitions. [2023-11-19 04:59:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:59:47,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2023-11-19 04:59:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:47,362 INFO L225 Difference]: With dead ends: 1713 [2023-11-19 04:59:47,363 INFO L226 Difference]: Without dead ends: 1159 [2023-11-19 04:59:47,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:59:47,368 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 2137 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 1801 mSolverCounterSat, 873 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2269 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 2674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 873 IncrementalHoareTripleChecker+Valid, 1801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:47,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2269 Valid, 1097 Invalid, 2674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [873 Valid, 1801 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 04:59:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2023-11-19 04:59:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1087. [2023-11-19 04:59:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 761 states have (on average 1.5821287779237845) internal successors, (1204), 813 states have internal predecessors, (1204), 252 states have call successors, (252), 65 states have call predecessors, (252), 73 states have return successors, (268), 245 states have call predecessors, (268), 247 states have call successors, (268) [2023-11-19 04:59:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1724 transitions. [2023-11-19 04:59:47,466 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1724 transitions. Word has length 60 [2023-11-19 04:59:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:47,467 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1724 transitions. [2023-11-19 04:59:47,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-19 04:59:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1724 transitions. [2023-11-19 04:59:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 04:59:47,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:47,470 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] [2023-11-19 04:59:47,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:59:47,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:47,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:47,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1456240948, now seen corresponding path program 1 times [2023-11-19 04:59:47,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:47,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655690349] [2023-11-19 04:59:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:47,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:47,666 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 04:59:47,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:47,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655690349] [2023-11-19 04:59:47,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655690349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:47,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:47,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:59:47,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005518742] [2023-11-19 04:59:47,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:47,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:59:47,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:47,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:59:47,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:59:47,675 INFO L87 Difference]: Start difference. First operand 1087 states and 1724 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:59:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:47,935 INFO L93 Difference]: Finished difference Result 2105 states and 3396 transitions. [2023-11-19 04:59:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:59:47,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 63 [2023-11-19 04:59:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:47,946 INFO L225 Difference]: With dead ends: 2105 [2023-11-19 04:59:47,949 INFO L226 Difference]: Without dead ends: 1087 [2023-11-19 04:59:47,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:59:47,959 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 210 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:47,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1338 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:59:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2023-11-19 04:59:48,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1087. [2023-11-19 04:59:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 761 states have (on average 1.540078843626807) internal successors, (1172), 813 states have internal predecessors, (1172), 252 states have call successors, (252), 65 states have call predecessors, (252), 73 states have return successors, (268), 245 states have call predecessors, (268), 247 states have call successors, (268) [2023-11-19 04:59:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1692 transitions. [2023-11-19 04:59:48,045 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1692 transitions. Word has length 63 [2023-11-19 04:59:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:48,046 INFO L495 AbstractCegarLoop]: Abstraction has 1087 states and 1692 transitions. [2023-11-19 04:59:48,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:59:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1692 transitions. [2023-11-19 04:59:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 04:59:48,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:48,048 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] [2023-11-19 04:59:48,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:59:48,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:48,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:48,049 INFO L85 PathProgramCache]: Analyzing trace with hash 610249146, now seen corresponding path program 1 times [2023-11-19 04:59:48,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:48,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234500639] [2023-11-19 04:59:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:48,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:48,424 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 04:59:48,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234500639] [2023-11-19 04:59:48,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234500639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:48,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:48,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:59:48,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055201168] [2023-11-19 04:59:48,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:48,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:59:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:59:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:59:48,428 INFO L87 Difference]: Start difference. First operand 1087 states and 1692 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-19 04:59:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:50,477 INFO L93 Difference]: Finished difference Result 2037 states and 3179 transitions. [2023-11-19 04:59:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:59:50,478 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 65 [2023-11-19 04:59:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:50,489 INFO L225 Difference]: With dead ends: 2037 [2023-11-19 04:59:50,489 INFO L226 Difference]: Without dead ends: 1220 [2023-11-19 04:59:50,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:59:50,496 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 880 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 354 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:50,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 1273 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [354 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 04:59:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-11-19 04:59:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1114. [2023-11-19 04:59:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 779 states have (on average 1.532734274711168) internal successors, (1194), 835 states have internal predecessors, (1194), 253 states have call successors, (253), 70 states have call predecessors, (253), 81 states have return successors, (279), 245 states have call predecessors, (279), 248 states have call successors, (279) [2023-11-19 04:59:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1726 transitions. [2023-11-19 04:59:50,595 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1726 transitions. Word has length 65 [2023-11-19 04:59:50,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:50,597 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1726 transitions. [2023-11-19 04:59:50,598 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-19 04:59:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1726 transitions. [2023-11-19 04:59:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 04:59:50,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:50,600 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] [2023-11-19 04:59:50,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:59:50,601 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:50,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash 518245107, now seen corresponding path program 1 times [2023-11-19 04:59:50,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:50,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854760863] [2023-11-19 04:59:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:50,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:50,754 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 04:59:50,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:50,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854760863] [2023-11-19 04:59:50,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854760863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:50,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:50,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:59:50,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051759398] [2023-11-19 04:59:50,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:50,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:50,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:50,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:50,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:50,757 INFO L87 Difference]: Start difference. First operand 1114 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 04:59:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:51,030 INFO L93 Difference]: Finished difference Result 3267 states and 5103 transitions. [2023-11-19 04:59:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 72 [2023-11-19 04:59:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:51,052 INFO L225 Difference]: With dead ends: 3267 [2023-11-19 04:59:51,053 INFO L226 Difference]: Without dead ends: 2169 [2023-11-19 04:59:51,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:51,062 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 486 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:51,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 1011 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:59:51,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2023-11-19 04:59:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2128. [2023-11-19 04:59:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1517 states have (on average 1.5405405405405406) internal successors, (2337), 1625 states have internal predecessors, (2337), 457 states have call successors, (457), 129 states have call predecessors, (457), 153 states have return successors, (526), 429 states have call predecessors, (526), 452 states have call successors, (526) [2023-11-19 04:59:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 3320 transitions. [2023-11-19 04:59:51,254 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 3320 transitions. Word has length 72 [2023-11-19 04:59:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:51,254 INFO L495 AbstractCegarLoop]: Abstraction has 2128 states and 3320 transitions. [2023-11-19 04:59:51,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 04:59:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 3320 transitions. [2023-11-19 04:59:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 04:59:51,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:51,257 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] [2023-11-19 04:59:51,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:59:51,258 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:51,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash -7438875, now seen corresponding path program 1 times [2023-11-19 04:59:51,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:51,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145081014] [2023-11-19 04:59:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:51,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:51,397 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 04:59:51,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:51,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145081014] [2023-11-19 04:59:51,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145081014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:51,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:51,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:59:51,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807778119] [2023-11-19 04:59:51,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:51,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:51,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:51,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:51,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:51,404 INFO L87 Difference]: Start difference. First operand 2128 states and 3320 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 04:59:51,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:51,816 INFO L93 Difference]: Finished difference Result 6310 states and 9930 transitions. [2023-11-19 04:59:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:51,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 70 [2023-11-19 04:59:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:51,858 INFO L225 Difference]: With dead ends: 6310 [2023-11-19 04:59:51,859 INFO L226 Difference]: Without dead ends: 4199 [2023-11-19 04:59:51,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:51,874 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 485 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:51,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1017 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:59:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2023-11-19 04:59:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4157. [2023-11-19 04:59:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4157 states, 2994 states have (on average 1.542752171008684) internal successors, (4619), 3206 states have internal predecessors, (4619), 865 states have call successors, (865), 247 states have call predecessors, (865), 297 states have return successors, (1048), 797 states have call predecessors, (1048), 860 states have call successors, (1048) [2023-11-19 04:59:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 6532 transitions. [2023-11-19 04:59:52,278 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 6532 transitions. Word has length 70 [2023-11-19 04:59:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:52,280 INFO L495 AbstractCegarLoop]: Abstraction has 4157 states and 6532 transitions. [2023-11-19 04:59:52,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 04:59:52,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 6532 transitions. [2023-11-19 04:59:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 04:59:52,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:52,285 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] [2023-11-19 04:59:52,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:59:52,286 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:52,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:52,286 INFO L85 PathProgramCache]: Analyzing trace with hash -195863275, now seen corresponding path program 1 times [2023-11-19 04:59:52,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:52,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089779495] [2023-11-19 04:59:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:52,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:52,402 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 04:59:52,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:52,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089779495] [2023-11-19 04:59:52,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089779495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:52,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:52,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:59:52,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891265240] [2023-11-19 04:59:52,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:52,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:52,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:52,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:52,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:52,406 INFO L87 Difference]: Start difference. First operand 4157 states and 6532 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 04:59:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:53,176 INFO L93 Difference]: Finished difference Result 12397 states and 19715 transitions. [2023-11-19 04:59:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:53,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 74 [2023-11-19 04:59:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:53,257 INFO L225 Difference]: With dead ends: 12397 [2023-11-19 04:59:53,257 INFO L226 Difference]: Without dead ends: 8259 [2023-11-19 04:59:53,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:53,282 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 484 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:53,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1023 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:59:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8259 states. [2023-11-19 04:59:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8259 to 8216. [2023-11-19 04:59:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8216 states, 5949 states have (on average 1.541939821818793) internal successors, (9173), 6369 states have internal predecessors, (9173), 1681 states have call successors, (1681), 483 states have call predecessors, (1681), 585 states have return successors, (2194), 1533 states have call predecessors, (2194), 1676 states have call successors, (2194) [2023-11-19 04:59:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 13048 transitions. [2023-11-19 04:59:54,040 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 13048 transitions. Word has length 74 [2023-11-19 04:59:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:54,042 INFO L495 AbstractCegarLoop]: Abstraction has 8216 states and 13048 transitions. [2023-11-19 04:59:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 04:59:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 13048 transitions. [2023-11-19 04:59:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 04:59:54,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:54,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:59:54,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:59:54,049 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:54,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:54,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1428095943, now seen corresponding path program 1 times [2023-11-19 04:59:54,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:54,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661581040] [2023-11-19 04:59:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:54,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:54,170 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 04:59:54,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:54,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661581040] [2023-11-19 04:59:54,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661581040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:54,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:54,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:59:54,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568757928] [2023-11-19 04:59:54,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:54,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:54,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:54,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:54,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:54,173 INFO L87 Difference]: Start difference. First operand 8216 states and 13048 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 04:59:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:55,361 INFO L93 Difference]: Finished difference Result 24572 states and 39780 transitions. [2023-11-19 04:59:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:55,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 72 [2023-11-19 04:59:55,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:55,514 INFO L225 Difference]: With dead ends: 24572 [2023-11-19 04:59:55,514 INFO L226 Difference]: Without dead ends: 16379 [2023-11-19 04:59:55,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:55,562 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 483 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:55,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 1029 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:59:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16379 states. [2023-11-19 04:59:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16379 to 16335. [2023-11-19 04:59:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16335 states, 11860 states have (on average 1.5395446880269814) internal successors, (18259), 12696 states have internal predecessors, (18259), 3313 states have call successors, (3313), 955 states have call predecessors, (3313), 1161 states have return successors, (4864), 3005 states have call predecessors, (4864), 3308 states have call successors, (4864) [2023-11-19 04:59:57,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16335 states to 16335 states and 26436 transitions. [2023-11-19 04:59:57,217 INFO L78 Accepts]: Start accepts. Automaton has 16335 states and 26436 transitions. Word has length 72 [2023-11-19 04:59:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:57,217 INFO L495 AbstractCegarLoop]: Abstraction has 16335 states and 26436 transitions. [2023-11-19 04:59:57,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 04:59:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 16335 states and 26436 transitions. [2023-11-19 04:59:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-19 04:59:57,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:57,221 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] [2023-11-19 04:59:57,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:59:57,221 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:59:57,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:57,222 INFO L85 PathProgramCache]: Analyzing trace with hash 740998967, now seen corresponding path program 1 times [2023-11-19 04:59:57,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:57,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106039312] [2023-11-19 04:59:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:57,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:57,362 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 04:59:57,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:57,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106039312] [2023-11-19 04:59:57,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106039312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:59:57,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:59:57,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:59:57,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681783119] [2023-11-19 04:59:57,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:59:57,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:59:57,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:57,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:59:57,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:57,366 INFO L87 Difference]: Start difference. First operand 16335 states and 26436 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 04:59:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:58,414 INFO L93 Difference]: Finished difference Result 17395 states and 28240 transitions. [2023-11-19 04:59:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:59:58,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 76 [2023-11-19 04:59:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:58,539 INFO L225 Difference]: With dead ends: 17395 [2023-11-19 04:59:58,539 INFO L226 Difference]: Without dead ends: 17384 [2023-11-19 04:59:58,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:59:58,555 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 469 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:58,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1027 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:59:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17384 states. [2023-11-19 05:00:00,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17384 to 17345. [2023-11-19 05:00:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17345 states, 12595 states have (on average 1.5380706629614926) internal successors, (19372), 13483 states have internal predecessors, (19372), 3517 states have call successors, (3517), 1014 states have call predecessors, (3517), 1232 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2023-11-19 05:00:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17345 states to 17345 states and 28164 transitions. [2023-11-19 05:00:00,355 INFO L78 Accepts]: Start accepts. Automaton has 17345 states and 28164 transitions. Word has length 76 [2023-11-19 05:00:00,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:00,355 INFO L495 AbstractCegarLoop]: Abstraction has 17345 states and 28164 transitions. [2023-11-19 05:00:00,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-19 05:00:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 17345 states and 28164 transitions. [2023-11-19 05:00:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-19 05:00:00,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:00,365 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:00,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 05:00:00,365 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:00,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:00,366 INFO L85 PathProgramCache]: Analyzing trace with hash -26458601, now seen corresponding path program 1 times [2023-11-19 05:00:00,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:00,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040426002] [2023-11-19 05:00:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:00,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-19 05:00:00,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:00,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040426002] [2023-11-19 05:00:00,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040426002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:00,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191248982] [2023-11-19 05:00:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:00,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:00,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:00,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:00,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:00:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:01,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:00:01,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-19 05:00:01,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:01,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191248982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:01,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:01,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 05:00:01,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184592915] [2023-11-19 05:00:01,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:01,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:01,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:00:01,221 INFO L87 Difference]: Start difference. First operand 17345 states and 28164 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:02,692 INFO L93 Difference]: Finished difference Result 36662 states and 61155 transitions. [2023-11-19 05:00:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 120 [2023-11-19 05:00:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:02,950 INFO L225 Difference]: With dead ends: 36662 [2023-11-19 05:00:02,951 INFO L226 Difference]: Without dead ends: 19334 [2023-11-19 05:00:03,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:00:03,009 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 213 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:03,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1236 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:00:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19334 states. [2023-11-19 05:00:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19334 to 19334. [2023-11-19 05:00:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19334 states, 14533 states have (on average 1.5891419527970825) internal successors, (23095), 15421 states have internal predecessors, (23095), 3517 states have call successors, (3517), 1065 states have call predecessors, (3517), 1283 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2023-11-19 05:00:04,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19334 states to 19334 states and 31887 transitions. [2023-11-19 05:00:04,352 INFO L78 Accepts]: Start accepts. Automaton has 19334 states and 31887 transitions. Word has length 120 [2023-11-19 05:00:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:04,353 INFO L495 AbstractCegarLoop]: Abstraction has 19334 states and 31887 transitions. [2023-11-19 05:00:04,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 19334 states and 31887 transitions. [2023-11-19 05:00:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-19 05:00:04,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:04,360 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:04,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:00:04,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 05:00:04,583 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:04,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 866612511, now seen corresponding path program 1 times [2023-11-19 05:00:04,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:04,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634296961] [2023-11-19 05:00:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-19 05:00:06,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:06,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634296961] [2023-11-19 05:00:06,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634296961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:06,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240719719] [2023-11-19 05:00:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:06,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:06,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:06,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:06,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:00:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:06,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:00:06,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 05:00:06,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:06,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240719719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:06,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:06,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2023-11-19 05:00:06,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256810329] [2023-11-19 05:00:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:06,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:06,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:00:06,886 INFO L87 Difference]: Start difference. First operand 19334 states and 31887 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:08,097 INFO L93 Difference]: Finished difference Result 40640 states and 68550 transitions. [2023-11-19 05:00:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 125 [2023-11-19 05:00:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:08,215 INFO L225 Difference]: With dead ends: 40640 [2023-11-19 05:00:08,216 INFO L226 Difference]: Without dead ends: 21323 [2023-11-19 05:00:08,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2023-11-19 05:00:08,307 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 211 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:08,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1236 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:00:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21323 states. [2023-11-19 05:00:09,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21323 to 21323. [2023-11-19 05:00:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21323 states, 16471 states have (on average 1.6281950094104791) internal successors, (26818), 17359 states have internal predecessors, (26818), 3517 states have call successors, (3517), 1116 states have call predecessors, (3517), 1334 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2023-11-19 05:00:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21323 states to 21323 states and 35610 transitions. [2023-11-19 05:00:09,938 INFO L78 Accepts]: Start accepts. Automaton has 21323 states and 35610 transitions. Word has length 125 [2023-11-19 05:00:09,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:09,939 INFO L495 AbstractCegarLoop]: Abstraction has 21323 states and 35610 transitions. [2023-11-19 05:00:09,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:09,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21323 states and 35610 transitions. [2023-11-19 05:00:09,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-19 05:00:09,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:09,946 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:09,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:00:10,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 05:00:10,169 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:10,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1667326191, now seen corresponding path program 1 times [2023-11-19 05:00:10,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:10,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873582680] [2023-11-19 05:00:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:10,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-19 05:00:11,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:00:11,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873582680] [2023-11-19 05:00:11,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873582680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:00:11,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091345194] [2023-11-19 05:00:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:11,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:00:11,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:00:11,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:00:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:00:12,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 1761 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:00:12,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:00:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 05:00:12,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:00:12,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091345194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:00:12,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:00:12,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [18] total 20 [2023-11-19 05:00:12,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559499643] [2023-11-19 05:00:12,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:00:12,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:00:12,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:00:12,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:00:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:00:12,199 INFO L87 Difference]: Start difference. First operand 21323 states and 35610 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:00:13,578 INFO L93 Difference]: Finished difference Result 44618 states and 75945 transitions. [2023-11-19 05:00:13,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:00:13,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 129 [2023-11-19 05:00:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:00:13,667 INFO L225 Difference]: With dead ends: 44618 [2023-11-19 05:00:13,667 INFO L226 Difference]: Without dead ends: 23312 [2023-11-19 05:00:13,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2023-11-19 05:00:13,715 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 209 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:00:13,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1236 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:00:13,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23312 states. [2023-11-19 05:00:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23312 to 23312. [2023-11-19 05:00:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23312 states, 18409 states have (on average 1.6590254766690207) internal successors, (30541), 19297 states have internal predecessors, (30541), 3517 states have call successors, (3517), 1167 states have call predecessors, (3517), 1385 states have return successors, (5275), 3188 states have call predecessors, (5275), 3512 states have call successors, (5275) [2023-11-19 05:00:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23312 states to 23312 states and 39333 transitions. [2023-11-19 05:00:15,135 INFO L78 Accepts]: Start accepts. Automaton has 23312 states and 39333 transitions. Word has length 129 [2023-11-19 05:00:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:00:15,135 INFO L495 AbstractCegarLoop]: Abstraction has 23312 states and 39333 transitions. [2023-11-19 05:00:15,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-19 05:00:15,136 INFO L276 IsEmpty]: Start isEmpty. Operand 23312 states and 39333 transitions. [2023-11-19 05:00:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-19 05:00:15,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:00:15,143 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:00:15,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:00:15,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41df9442-50d3-49a6-adf7-fb8a6b608c74/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:00:15,358 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:00:15,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:00:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2900205, now seen corresponding path program 1 times [2023-11-19 05:00:15,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:00:15,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677379628] [2023-11-19 05:00:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:00:15,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:00:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat