./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.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_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/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_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/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_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/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 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:18:13,625 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:18:13,693 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:18:13,699 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:18:13,699 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:18:13,735 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:18:13,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:18:13,737 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:18:13,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:18:13,738 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:18:13,738 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:18:13,739 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:18:13,739 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:18:13,740 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:18:13,741 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:18:13,741 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:18:13,742 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:18:13,742 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:18:13,743 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:18:13,743 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:18:13,744 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:18:13,744 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:18:13,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:18:13,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:18:13,746 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:18:13,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:18:13,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:18:13,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:18:13,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:18:13,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:18:13,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:18:13,749 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:18:13,749 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:18:13,750 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:18:13,750 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:18:13,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:18:13,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:18:13,752 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:18:13,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:18:13,765 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:18:13,765 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:18:13,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:18:13,767 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:18:13,767 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:18:13,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:18:13,768 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_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f20249a191004f50add5285446ee5ffba043f1ff9b40e0e115c641082e595e2 [2023-11-19 04:18:14,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:18:14,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:18:14,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:18:14,086 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:18:14,086 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:18:14,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2023-11-19 04:18:17,201 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:18:17,629 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:18:17,629 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c [2023-11-19 04:18:17,664 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/data/9e9bdf5a0/5e0016c534da46ee9edd7169619a33e7/FLAGa99c9d6b6 [2023-11-19 04:18:17,677 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/data/9e9bdf5a0/5e0016c534da46ee9edd7169619a33e7 [2023-11-19 04:18:17,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:18:17,681 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:18:17,682 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:18:17,682 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:18:17,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:18:17,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:18:17" (1/1) ... [2023-11-19 04:18:17,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a11006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:17, skipping insertion in model container [2023-11-19 04:18:17,690 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:18:17" (1/1) ... [2023-11-19 04:18:17,777 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:18:18,010 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_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2023-11-19 04:18:18,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:18:18,385 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:18:18,397 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-11-19 04:18:18,399 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [716] [2023-11-19 04:18:18,399 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [725] [2023-11-19 04:18:18,400 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification9_spec.i","") [739] [2023-11-19 04:18:18,401 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [905] [2023-11-19 04:18:18,401 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2574] [2023-11-19 04:18:18,401 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2940] [2023-11-19 04:18:18,401 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2978] [2023-11-19 04:18:18,401 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3330] [2023-11-19 04:18:18,402 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3448] [2023-11-19 04:18:18,420 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_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/sv-benchmarks/c/product-lines/elevator_spec9_product32.cil.c[17414,17427] [2023-11-19 04:18:18,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:18:18,560 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:18:18,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18 WrapperNode [2023-11-19 04:18:18,561 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:18:18,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:18:18,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:18:18,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:18:18,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,668 INFO L138 Inliner]: procedures = 99, calls = 352, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 933 [2023-11-19 04:18:18,669 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:18:18,669 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:18:18,669 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:18:18,670 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:18:18,679 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,700 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,747 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:18:18,766 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:18:18,766 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:18:18,766 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:18:18,767 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (1/1) ... [2023-11-19 04:18:18,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:18:18,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:18:18,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:18:18,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:18:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-19 04:18:18,917 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-19 04:18:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-19 04:18:18,917 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-19 04:18:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-19 04:18:18,918 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-19 04:18:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 04:18:18,919 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-19 04:18:18,919 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-19 04:18:18,919 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-19 04:18:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-19 04:18:18,920 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-19 04:18:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-19 04:18:18,921 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-19 04:18:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-19 04:18:18,922 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-19 04:18:18,922 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-19 04:18:18,922 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-19 04:18:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-19 04:18:18,924 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-19 04:18:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-19 04:18:18,924 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-19 04:18:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:18:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:18:18,925 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-19 04:18:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-19 04:18:18,925 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-19 04:18:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-19 04:18:18,925 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-19 04:18:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-19 04:18:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-19 04:18:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-19 04:18:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-19 04:18:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-19 04:18:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-19 04:18:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-19 04:18:18,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-19 04:18:18,927 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-19 04:18:18,927 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-19 04:18:18,927 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-19 04:18:18,927 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-19 04:18:18,927 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-19 04:18:18,927 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-19 04:18:18,927 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-19 04:18:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-19 04:18:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-19 04:18:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-19 04:18:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-19 04:18:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-19 04:18:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-11-19 04:18:18,929 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-11-19 04:18:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:18:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-19 04:18:18,930 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-19 04:18:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:18:18,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:18:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-19 04:18:18,930 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-19 04:18:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-19 04:18:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-19 04:18:19,130 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:18:19,133 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:18:20,351 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:18:21,295 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:18:21,295 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:18:21,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:18:21 BoogieIcfgContainer [2023-11-19 04:18:21,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:18:21,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:18:21,315 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:18:21,318 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:18:21,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:18:17" (1/3) ... [2023-11-19 04:18:21,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e144165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:18:21, skipping insertion in model container [2023-11-19 04:18:21,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:18:18" (2/3) ... [2023-11-19 04:18:21,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e144165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:18:21, skipping insertion in model container [2023-11-19 04:18:21,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:18:21" (3/3) ... [2023-11-19 04:18:21,324 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product32.cil.c [2023-11-19 04:18:21,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:18:21,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:18:21,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:18:21,439 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;@221c9359, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:18:21,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:18:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 401 states, 268 states have (on average 1.5671641791044777) internal successors, (420), 291 states have internal predecessors, (420), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-19 04:18:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 04:18:21,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:21,464 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] [2023-11-19 04:18:21,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:21,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:21,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1501564604, now seen corresponding path program 1 times [2023-11-19 04:18:21,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:21,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554926301] [2023-11-19 04:18:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:21,944 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 04:18:21,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554926301] [2023-11-19 04:18:21,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554926301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:21,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:21,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:18:21,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959433020] [2023-11-19 04:18:21,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:18:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:21,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:18:21,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:18:21,986 INFO L87 Difference]: Start difference. First operand has 401 states, 268 states have (on average 1.5671641791044777) internal successors, (420), 291 states have internal predecessors, (420), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 04:18:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:22,171 INFO L93 Difference]: Finished difference Result 419 states and 653 transitions. [2023-11-19 04:18:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:18:22,173 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2023-11-19 04:18:22,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:22,192 INFO L225 Difference]: With dead ends: 419 [2023-11-19 04:18:22,192 INFO L226 Difference]: Without dead ends: 397 [2023-11-19 04:18:22,196 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 04:18:22,199 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:22,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 579 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:18:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-19 04:18:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2023-11-19 04:18:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 266 states have (on average 1.556390977443609) internal successors, (414), 287 states have internal predecessors, (414), 103 states have call successors, (103), 28 states have call predecessors, (103), 27 states have return successors, (98), 95 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-19 04:18:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 615 transitions. [2023-11-19 04:18:22,284 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 615 transitions. Word has length 43 [2023-11-19 04:18:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:22,286 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 615 transitions. [2023-11-19 04:18:22,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-19 04:18:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 615 transitions. [2023-11-19 04:18:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 04:18:22,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:22,290 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] [2023-11-19 04:18:22,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:18:22,291 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:22,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:22,292 INFO L85 PathProgramCache]: Analyzing trace with hash 537521801, now seen corresponding path program 1 times [2023-11-19 04:18:22,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:22,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078697540] [2023-11-19 04:18:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:22,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:22,949 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 04:18:22,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078697540] [2023-11-19 04:18:22,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078697540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:22,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:22,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:18:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004828858] [2023-11-19 04:18:22,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:22,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:18:22,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:18:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:18:22,964 INFO L87 Difference]: Start difference. First operand 397 states and 615 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-19 04:18:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:25,208 INFO L93 Difference]: Finished difference Result 1279 states and 2019 transitions. [2023-11-19 04:18:25,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:18:25,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2023-11-19 04:18:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:25,218 INFO L225 Difference]: With dead ends: 1279 [2023-11-19 04:18:25,218 INFO L226 Difference]: Without dead ends: 898 [2023-11-19 04:18:25,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:18:25,225 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 1244 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:25,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1315 Valid, 949 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 04:18:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2023-11-19 04:18:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 801. [2023-11-19 04:18:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 556 states have (on average 1.5719424460431655) internal successors, (874), 586 states have internal predecessors, (874), 193 states have call successors, (193), 50 states have call predecessors, (193), 51 states have return successors, (195), 177 states have call predecessors, (195), 188 states have call successors, (195) [2023-11-19 04:18:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1262 transitions. [2023-11-19 04:18:25,312 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1262 transitions. Word has length 44 [2023-11-19 04:18:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:25,313 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1262 transitions. [2023-11-19 04:18:25,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-19 04:18:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1262 transitions. [2023-11-19 04:18:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 04:18:25,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:25,322 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:25,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:18:25,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:25,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:25,323 INFO L85 PathProgramCache]: Analyzing trace with hash 147417259, now seen corresponding path program 1 times [2023-11-19 04:18:25,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:25,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578282581] [2023-11-19 04:18:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:25,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:18:25,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:25,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578282581] [2023-11-19 04:18:25,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578282581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:25,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:25,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:18:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660765111] [2023-11-19 04:18:25,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:18:25,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:18:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:18:25,859 INFO L87 Difference]: Start difference. First operand 801 states and 1262 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 04:18:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:28,110 INFO L93 Difference]: Finished difference Result 2467 states and 3928 transitions. [2023-11-19 04:18:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:18:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 88 [2023-11-19 04:18:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:28,157 INFO L225 Difference]: With dead ends: 2467 [2023-11-19 04:18:28,159 INFO L226 Difference]: Without dead ends: 1683 [2023-11-19 04:18:28,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 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 04:18:28,172 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 1192 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 2789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:28,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 1464 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 04:18:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2023-11-19 04:18:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1614. [2023-11-19 04:18:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1131 states have (on average 1.5764809902740937) internal successors, (1783), 1187 states have internal predecessors, (1783), 378 states have call successors, (378), 97 states have call predecessors, (378), 104 states have return successors, (405), 353 states have call predecessors, (405), 373 states have call successors, (405) [2023-11-19 04:18:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2566 transitions. [2023-11-19 04:18:28,372 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2566 transitions. Word has length 88 [2023-11-19 04:18:28,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:28,374 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 2566 transitions. [2023-11-19 04:18:28,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 04:18:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2566 transitions. [2023-11-19 04:18:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 04:18:28,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:28,382 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:28,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:18:28,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:28,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash -291474289, now seen corresponding path program 1 times [2023-11-19 04:18:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:28,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650707486] [2023-11-19 04:18:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:28,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:18:28,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650707486] [2023-11-19 04:18:28,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650707486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:28,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:28,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 04:18:28,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436521482] [2023-11-19 04:18:28,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:28,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:18:28,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:18:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:18:28,905 INFO L87 Difference]: Start difference. First operand 1614 states and 2566 transitions. Second operand has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 04:18:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:32,600 INFO L93 Difference]: Finished difference Result 4080 states and 6469 transitions. [2023-11-19 04:18:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 04:18:32,601 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 91 [2023-11-19 04:18:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:32,623 INFO L225 Difference]: With dead ends: 4080 [2023-11-19 04:18:32,623 INFO L226 Difference]: Without dead ends: 2482 [2023-11-19 04:18:32,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-19 04:18:32,642 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 1011 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 5196 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 5498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 5196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:32,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 2524 Invalid, 5498 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [302 Valid, 5196 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-19 04:18:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2023-11-19 04:18:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 2397. [2023-11-19 04:18:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 1667 states have (on average 1.5590881823635272) internal successors, (2599), 1745 states have internal predecessors, (2599), 563 states have call successors, (563), 147 states have call predecessors, (563), 166 states have return successors, (608), 537 states have call predecessors, (608), 558 states have call successors, (608) [2023-11-19 04:18:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3770 transitions. [2023-11-19 04:18:32,892 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3770 transitions. Word has length 91 [2023-11-19 04:18:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:32,893 INFO L495 AbstractCegarLoop]: Abstraction has 2397 states and 3770 transitions. [2023-11-19 04:18:32,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.0) internal successors, (49), 8 states have internal predecessors, (49), 5 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2023-11-19 04:18:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3770 transitions. [2023-11-19 04:18:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-19 04:18:32,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:32,898 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:32,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:18:32,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:32,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:32,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1796854371, now seen corresponding path program 1 times [2023-11-19 04:18:32,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:32,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483796278] [2023-11-19 04:18:32,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:32,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:18:33,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:33,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483796278] [2023-11-19 04:18:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483796278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:33,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:33,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:18:33,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529869169] [2023-11-19 04:18:33,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:33,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:18:33,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:33,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:18:33,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:18:33,310 INFO L87 Difference]: Start difference. First operand 2397 states and 3770 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:18:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:34,030 INFO L93 Difference]: Finished difference Result 2498 states and 3938 transitions. [2023-11-19 04:18:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:18:34,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 92 [2023-11-19 04:18:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:34,056 INFO L225 Difference]: With dead ends: 2498 [2023-11-19 04:18:34,056 INFO L226 Difference]: Without dead ends: 2483 [2023-11-19 04:18:34,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:18:34,060 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 708 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:34,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 1514 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:18:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2023-11-19 04:18:34,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2403. [2023-11-19 04:18:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 1673 states have (on average 1.557083084279737) internal successors, (2605), 1751 states have internal predecessors, (2605), 563 states have call successors, (563), 147 states have call predecessors, (563), 166 states have return successors, (608), 537 states have call predecessors, (608), 558 states have call successors, (608) [2023-11-19 04:18:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3776 transitions. [2023-11-19 04:18:34,338 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3776 transitions. Word has length 92 [2023-11-19 04:18:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:34,339 INFO L495 AbstractCegarLoop]: Abstraction has 2403 states and 3776 transitions. [2023-11-19 04:18:34,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-19 04:18:34,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3776 transitions. [2023-11-19 04:18:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-19 04:18:34,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:34,343 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:34,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:18:34,344 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:34,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1885511725, now seen corresponding path program 1 times [2023-11-19 04:18:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:34,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357828119] [2023-11-19 04:18:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:18:34,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:34,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357828119] [2023-11-19 04:18:34,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357828119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:34,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:34,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 04:18:34,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199981362] [2023-11-19 04:18:34,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:34,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:18:34,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:34,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:18:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:18:34,696 INFO L87 Difference]: Start difference. First operand 2403 states and 3776 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 04:18:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:35,409 INFO L93 Difference]: Finished difference Result 2568 states and 4019 transitions. [2023-11-19 04:18:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 04:18:35,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 97 [2023-11-19 04:18:35,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:35,438 INFO L225 Difference]: With dead ends: 2568 [2023-11-19 04:18:35,438 INFO L226 Difference]: Without dead ends: 2553 [2023-11-19 04:18:35,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:18:35,442 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 644 mSDsluCounter, 2173 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:35,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 2745 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:18:35,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2023-11-19 04:18:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2499. [2023-11-19 04:18:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 1745 states have (on average 1.5535816618911176) internal successors, (2711), 1823 states have internal predecessors, (2711), 579 states have call successors, (579), 155 states have call predecessors, (579), 174 states have return successors, (634), 553 states have call predecessors, (634), 574 states have call successors, (634) [2023-11-19 04:18:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 3924 transitions. [2023-11-19 04:18:35,792 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 3924 transitions. Word has length 97 [2023-11-19 04:18:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:35,792 INFO L495 AbstractCegarLoop]: Abstraction has 2499 states and 3924 transitions. [2023-11-19 04:18:35,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 04:18:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 3924 transitions. [2023-11-19 04:18:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-19 04:18:35,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:35,798 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:35,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:18:35,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:35,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:35,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1869992431, now seen corresponding path program 1 times [2023-11-19 04:18:35,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:35,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382176432] [2023-11-19 04:18:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:35,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:18:35,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:35,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382176432] [2023-11-19 04:18:35,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382176432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:35,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:35,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:18:35,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588745169] [2023-11-19 04:18:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:35,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:18:35,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:18:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:18:35,950 INFO L87 Difference]: Start difference. First operand 2499 states and 3924 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:36,390 INFO L93 Difference]: Finished difference Result 6398 states and 10140 transitions. [2023-11-19 04:18:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:18:36,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 104 [2023-11-19 04:18:36,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:36,422 INFO L225 Difference]: With dead ends: 6398 [2023-11-19 04:18:36,423 INFO L226 Difference]: Without dead ends: 3915 [2023-11-19 04:18:36,437 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 04:18:36,438 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 571 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:36,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 1191 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:18:36,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2023-11-19 04:18:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3875. [2023-11-19 04:18:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 2715 states have (on average 1.5491712707182321) internal successors, (4206), 2840 states have internal predecessors, (4206), 889 states have call successors, (889), 237 states have call predecessors, (889), 270 states have return successors, (1022), 845 states have call predecessors, (1022), 884 states have call successors, (1022) [2023-11-19 04:18:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 6117 transitions. [2023-11-19 04:18:36,862 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 6117 transitions. Word has length 104 [2023-11-19 04:18:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:36,862 INFO L495 AbstractCegarLoop]: Abstraction has 3875 states and 6117 transitions. [2023-11-19 04:18:36,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 6117 transitions. [2023-11-19 04:18:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 04:18:36,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:36,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:36,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:18:36,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:36,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:36,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2134902153, now seen corresponding path program 1 times [2023-11-19 04:18:36,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:36,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782223476] [2023-11-19 04:18:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:18:37,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:37,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782223476] [2023-11-19 04:18:37,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782223476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:37,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:37,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:18:37,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896191787] [2023-11-19 04:18:37,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:37,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:18:37,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:37,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:18:37,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:18:37,027 INFO L87 Difference]: Start difference. First operand 3875 states and 6117 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:37,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:37,733 INFO L93 Difference]: Finished difference Result 10525 states and 16846 transitions. [2023-11-19 04:18:37,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:18:37,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2023-11-19 04:18:37,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:37,809 INFO L225 Difference]: With dead ends: 10525 [2023-11-19 04:18:37,810 INFO L226 Difference]: Without dead ends: 6669 [2023-11-19 04:18:37,841 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 04:18:37,843 INFO L413 NwaCegarLoop]: 639 mSDtfsCounter, 570 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:37,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1197 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:18:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6669 states. [2023-11-19 04:18:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6669 to 6628. [2023-11-19 04:18:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6628 states, 4656 states have (on average 1.5448883161512028) internal successors, (7193), 4875 states have internal predecessors, (7193), 1509 states have call successors, (1509), 401 states have call predecessors, (1509), 462 states have return successors, (1868), 1429 states have call predecessors, (1868), 1504 states have call successors, (1868) [2023-11-19 04:18:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6628 states to 6628 states and 10570 transitions. [2023-11-19 04:18:38,559 INFO L78 Accepts]: Start accepts. Automaton has 6628 states and 10570 transitions. Word has length 105 [2023-11-19 04:18:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:38,560 INFO L495 AbstractCegarLoop]: Abstraction has 6628 states and 10570 transitions. [2023-11-19 04:18:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6628 states and 10570 transitions. [2023-11-19 04:18:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 04:18:38,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:38,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:38,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:18:38,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:38,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1757172849, now seen corresponding path program 1 times [2023-11-19 04:18:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:38,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490983814] [2023-11-19 04:18:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:18:38,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:38,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490983814] [2023-11-19 04:18:38,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490983814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:38,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:38,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:18:38,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921218409] [2023-11-19 04:18:38,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:38,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:18:38,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:18:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:18:38,704 INFO L87 Difference]: Start difference. First operand 6628 states and 10570 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:39,954 INFO L93 Difference]: Finished difference Result 18780 states and 30626 transitions. [2023-11-19 04:18:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:18:39,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 106 [2023-11-19 04:18:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:40,107 INFO L225 Difference]: With dead ends: 18780 [2023-11-19 04:18:40,108 INFO L226 Difference]: Without dead ends: 12177 [2023-11-19 04:18:40,169 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 04:18:40,172 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 569 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:40,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 1203 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:18:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2023-11-19 04:18:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 12135. [2023-11-19 04:18:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12135 states, 8539 states have (on average 1.540344302611547) internal successors, (13153), 8946 states have internal predecessors, (13153), 2749 states have call successors, (2749), 729 states have call predecessors, (2749), 846 states have return successors, (3824), 2597 states have call predecessors, (3824), 2744 states have call successors, (3824) [2023-11-19 04:18:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12135 states to 12135 states and 19726 transitions. [2023-11-19 04:18:41,566 INFO L78 Accepts]: Start accepts. Automaton has 12135 states and 19726 transitions. Word has length 106 [2023-11-19 04:18:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:41,566 INFO L495 AbstractCegarLoop]: Abstraction has 12135 states and 19726 transitions. [2023-11-19 04:18:41,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 12135 states and 19726 transitions. [2023-11-19 04:18:41,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 04:18:41,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:41,571 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:41,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:18:41,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:41,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1362497077, now seen corresponding path program 1 times [2023-11-19 04:18:41,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:41,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954053180] [2023-11-19 04:18:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:41,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:18:41,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:41,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954053180] [2023-11-19 04:18:41,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954053180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:41,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:41,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:18:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266333754] [2023-11-19 04:18:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:41,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:18:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:18:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:18:41,691 INFO L87 Difference]: Start difference. First operand 12135 states and 19726 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:43,891 INFO L93 Difference]: Finished difference Result 35291 states and 59491 transitions. [2023-11-19 04:18:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:18:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2023-11-19 04:18:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:44,072 INFO L225 Difference]: With dead ends: 35291 [2023-11-19 04:18:44,072 INFO L226 Difference]: Without dead ends: 23193 [2023-11-19 04:18:44,148 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 04:18:44,149 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 568 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:44,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1209 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:18:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23193 states. [2023-11-19 04:18:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23193 to 23150. [2023-11-19 04:18:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23150 states, 16306 states have (on average 1.5354470746964308) internal successors, (25037), 17089 states have internal predecessors, (25037), 5229 states have call successors, (5229), 1385 states have call predecessors, (5229), 1614 states have return successors, (8672), 4933 states have call predecessors, (8672), 5224 states have call successors, (8672) [2023-11-19 04:18:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23150 states to 23150 states and 38938 transitions. [2023-11-19 04:18:46,789 INFO L78 Accepts]: Start accepts. Automaton has 23150 states and 38938 transitions. Word has length 107 [2023-11-19 04:18:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:46,790 INFO L495 AbstractCegarLoop]: Abstraction has 23150 states and 38938 transitions. [2023-11-19 04:18:46,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 23150 states and 38938 transitions. [2023-11-19 04:18:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 04:18:46,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:46,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:18:46,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:18:46,796 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:46,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:46,797 INFO L85 PathProgramCache]: Analyzing trace with hash 711986931, now seen corresponding path program 1 times [2023-11-19 04:18:46,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:46,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528476341] [2023-11-19 04:18:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:46,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 04:18:46,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:46,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528476341] [2023-11-19 04:18:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528476341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:46,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:46,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:18:46,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116389219] [2023-11-19 04:18:46,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:46,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:18:46,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:46,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:18:46,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:18:46,924 INFO L87 Difference]: Start difference. First operand 23150 states and 38938 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:48,945 INFO L93 Difference]: Finished difference Result 24571 states and 41643 transitions. [2023-11-19 04:18:48,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:18:48,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 108 [2023-11-19 04:18:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:49,116 INFO L225 Difference]: With dead ends: 24571 [2023-11-19 04:18:49,117 INFO L226 Difference]: Without dead ends: 24560 [2023-11-19 04:18:49,130 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 04:18:49,131 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 554 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:49,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1207 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:18:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24560 states. [2023-11-19 04:18:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24560 to 24516. [2023-11-19 04:18:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24516 states, 17267 states have (on average 1.5334453002837782) internal successors, (26478), 18097 states have internal predecessors, (26478), 5539 states have call successors, (5539), 1467 states have call predecessors, (5539), 1709 states have return successors, (9536), 5224 states have call predecessors, (9536), 5534 states have call successors, (9536) [2023-11-19 04:18:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24516 states to 24516 states and 41553 transitions. [2023-11-19 04:18:51,781 INFO L78 Accepts]: Start accepts. Automaton has 24516 states and 41553 transitions. Word has length 108 [2023-11-19 04:18:51,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:51,782 INFO L495 AbstractCegarLoop]: Abstraction has 24516 states and 41553 transitions. [2023-11-19 04:18:51,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-19 04:18:51,782 INFO L276 IsEmpty]: Start isEmpty. Operand 24516 states and 41553 transitions. [2023-11-19 04:18:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-19 04:18:51,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:51,794 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:18:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 04:18:51,795 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:51,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2030742268, now seen corresponding path program 1 times [2023-11-19 04:18:51,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:51,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262950441] [2023-11-19 04:18:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:51,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:52,016 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-19 04:18:52,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:52,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262950441] [2023-11-19 04:18:52,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262950441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:18:52,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:18:52,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:18:52,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408426671] [2023-11-19 04:18:52,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:18:52,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:18:52,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:18:52,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:18:52,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:18:52,021 INFO L87 Difference]: Start difference. First operand 24516 states and 41553 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-19 04:18:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:18:54,300 INFO L93 Difference]: Finished difference Result 49897 states and 87171 transitions. [2023-11-19 04:18:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:18:54,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 161 [2023-11-19 04:18:54,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:18:54,475 INFO L225 Difference]: With dead ends: 49897 [2023-11-19 04:18:54,476 INFO L226 Difference]: Without dead ends: 25398 [2023-11-19 04:18:54,575 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 04:18:54,576 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 30 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:18:54,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1707 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:18:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25398 states. [2023-11-19 04:18:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25398 to 24624. [2023-11-19 04:18:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24624 states, 17375 states have (on average 1.5301294964028778) internal successors, (26586), 18205 states have internal predecessors, (26586), 5539 states have call successors, (5539), 1467 states have call predecessors, (5539), 1709 states have return successors, (9536), 5224 states have call predecessors, (9536), 5534 states have call successors, (9536) [2023-11-19 04:18:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24624 states to 24624 states and 41661 transitions. [2023-11-19 04:18:57,103 INFO L78 Accepts]: Start accepts. Automaton has 24624 states and 41661 transitions. Word has length 161 [2023-11-19 04:18:57,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:18:57,103 INFO L495 AbstractCegarLoop]: Abstraction has 24624 states and 41661 transitions. [2023-11-19 04:18:57,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-19 04:18:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24624 states and 41661 transitions. [2023-11-19 04:18:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-19 04:18:57,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:18:57,118 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:18:57,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 04:18:57,118 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:18:57,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:18:57,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1717865814, now seen corresponding path program 1 times [2023-11-19 04:18:57,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:18:57,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923559846] [2023-11-19 04:18:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:57,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:18:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:18:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-19 04:18:57,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:18:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923559846] [2023-11-19 04:18:57,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923559846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:18:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769770700] [2023-11-19 04:18:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:18:57,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:18:57,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:18:57,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:18:57,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51a291e5-5f14-4a0a-8496-c1aa1d90a7b5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process