./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX --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 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:02:45,501 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:02:45,646 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:02:45,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:02:45,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:02:45,697 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:02:45,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:02:45,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:02:45,700 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:02:45,707 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:02:45,708 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:02:45,710 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:02:45,710 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:02:45,712 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:02:45,713 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:02:45,713 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:02:45,714 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:02:45,714 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:02:45,715 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:02:45,715 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:02:45,716 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:02:45,716 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:02:45,717 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:02:45,718 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:02:45,718 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:02:45,719 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:02:45,719 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:02:45,720 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:02:45,720 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:02:45,721 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:02:45,722 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:02:45,722 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:02:45,723 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:02:45,723 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:02:45,723 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:02:45,724 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:02:45,724 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:45,724 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:02:45,724 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:02:45,725 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:02:45,725 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:02:45,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:02:45,726 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:02:45,726 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:02:45,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:02:45,727 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_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8090ac1e7e8284dad30217492085f9e11f6491349a4adb4aa3c2904a72e0131a [2023-11-12 01:02:46,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:02:46,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:02:46,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:02:46,053 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:02:46,054 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:02:46,057 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2023-11-12 01:02:49,366 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:02:49,794 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:02:49,798 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c [2023-11-12 01:02:49,834 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/data/5399b3e84/f4dc8f7ddd974562a60752b148304522/FLAG2dcca3296 [2023-11-12 01:02:49,854 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/data/5399b3e84/f4dc8f7ddd974562a60752b148304522 [2023-11-12 01:02:49,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:02:49,865 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:02:49,867 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:49,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:02:49,874 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:02:49,875 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:49" (1/1) ... [2023-11-12 01:02:49,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472939cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:49, skipping insertion in model container [2023-11-12 01:02:49,876 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:02:49" (1/1) ... [2023-11-12 01:02:49,959 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:02:50,190 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_3acf09a4-996b-4fa2-930e-b34df3a6c26c/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2023-11-12 01:02:50,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:50,685 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:02:50,694 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-11-12 01:02:50,695 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [57] [2023-11-12 01:02:50,696 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [421] [2023-11-12 01:02:50,696 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1088] [2023-11-12 01:02:50,696 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [1454] [2023-11-12 01:02:50,697 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1466] [2023-11-12 01:02:50,697 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1586] [2023-11-12 01:02:50,697 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1621] [2023-11-12 01:02:50,697 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3188] [2023-11-12 01:02:50,698 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [3279] [2023-11-12 01:02:50,701 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_3acf09a4-996b-4fa2-930e-b34df3a6c26c/sv-benchmarks/c/product-lines/elevator_spec2_product22.cil.c[1545,1558] [2023-11-12 01:02:50,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:02:50,935 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:02:50,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50 WrapperNode [2023-11-12 01:02:50,935 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:02:50,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:50,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:02:50,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:02:50,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,006 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,074 INFO L138 Inliner]: procedures = 94, calls = 345, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 875 [2023-11-12 01:02:51,075 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:02:51,076 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:02:51,076 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:02:51,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:02:51,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,093 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,127 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,145 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,151 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:02:51,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:02:51,169 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:02:51,169 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:02:51,170 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (1/1) ... [2023-11-12 01:02:51,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:02:51,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:51,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:02:51,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3acf09a4-996b-4fa2-930e-b34df3a6c26c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:02:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:02:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-12 01:02:51,299 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-12 01:02:51,299 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-12 01:02:51,300 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-12 01:02:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-12 01:02:51,300 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-12 01:02:51,300 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-12 01:02:51,301 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-12 01:02:51,301 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-12 01:02:51,301 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-12 01:02:51,301 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-12 01:02:51,301 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-12 01:02:51,302 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-12 01:02:51,302 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-12 01:02:51,302 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-12 01:02:51,302 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-12 01:02:51,303 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-12 01:02:51,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-12 01:02:51,303 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-12 01:02:51,303 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-12 01:02:51,304 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-12 01:02:51,304 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-12 01:02:51,304 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-12 01:02:51,304 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-12 01:02:51,304 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-12 01:02:51,305 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-12 01:02:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-12 01:02:51,305 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-12 01:02:51,305 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-12 01:02:51,306 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-12 01:02:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-12 01:02:51,306 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-12 01:02:51,306 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-12 01:02:51,306 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-12 01:02:51,307 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-12 01:02:51,307 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-12 01:02:51,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:02:51,307 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-12 01:02:51,307 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-12 01:02:51,308 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-12 01:02:51,308 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-12 01:02:51,308 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-12 01:02:51,308 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-12 01:02:51,308 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-12 01:02:51,309 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-12 01:02:51,309 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2023-11-12 01:02:51,309 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2023-11-12 01:02:51,309 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-12 01:02:51,309 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-12 01:02:51,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:02:51,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:02:51,310 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-12 01:02:51,310 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-12 01:02:51,496 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:02:51,500 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:02:53,043 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:02:54,027 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:02:54,028 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:02:54,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:54 BoogieIcfgContainer [2023-11-12 01:02:54,035 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:02:54,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:02:54,038 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:02:54,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:02:54,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:02:49" (1/3) ... [2023-11-12 01:02:54,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c23bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:54, skipping insertion in model container [2023-11-12 01:02:54,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:02:50" (2/3) ... [2023-11-12 01:02:54,046 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c23bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:02:54, skipping insertion in model container [2023-11-12 01:02:54,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:02:54" (3/3) ... [2023-11-12 01:02:54,048 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product22.cil.c [2023-11-12 01:02:54,071 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:02:54,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:02:54,138 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:02:54,146 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;@43277cbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:02:54,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:02:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-12 01:02:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 01:02:54,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:54,190 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] [2023-11-12 01:02:54,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:54,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:54,197 INFO L85 PathProgramCache]: Analyzing trace with hash -260150471, now seen corresponding path program 1 times [2023-11-12 01:02:54,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:54,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034083687] [2023-11-12 01:02:54,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:54,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:54,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:54,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034083687] [2023-11-12 01:02:54,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034083687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:54,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:54,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:02:54,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932140534] [2023-11-12 01:02:54,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:54,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 01:02:54,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:54,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 01:02:54,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:02:54,848 INFO L87 Difference]: Start difference. First operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 01:02:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:55,045 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2023-11-12 01:02:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 01:02:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2023-11-12 01:02:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:55,071 INFO L225 Difference]: With dead ends: 401 [2023-11-12 01:02:55,072 INFO L226 Difference]: Without dead ends: 379 [2023-11-12 01:02:55,076 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 [2023-11-12 01:02:55,081 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:55,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 563 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:02:55,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-12 01:02:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-11-12 01:02:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 256 states have (on average 1.58203125) internal successors, (405), 277 states have internal predecessors, (405), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-12 01:02:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2023-11-12 01:02:55,239 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2023-11-12 01:02:55,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:55,242 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2023-11-12 01:02:55,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-12 01:02:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2023-11-12 01:02:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 01:02:55,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:55,252 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] [2023-11-12 01:02:55,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:02:55,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:55,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:55,255 INFO L85 PathProgramCache]: Analyzing trace with hash -504960938, now seen corresponding path program 1 times [2023-11-12 01:02:55,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:55,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731290220] [2023-11-12 01:02:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:55,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:56,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:56,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731290220] [2023-11-12 01:02:56,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731290220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:56,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:56,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:02:56,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814245183] [2023-11-12 01:02:56,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:56,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:02:56,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:56,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:02:56,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:02:56,113 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 01:02:58,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:58,727 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2023-11-12 01:02:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:02:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2023-11-12 01:02:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:58,739 INFO L225 Difference]: With dead ends: 1243 [2023-11-12 01:02:58,739 INFO L226 Difference]: Without dead ends: 880 [2023-11-12 01:02:58,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:02:58,746 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1615 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:58,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1682 Valid, 893 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 01:02:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2023-11-12 01:02:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2023-11-12 01:02:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 558 states have (on average 1.603942652329749) internal successors, (895), 588 states have internal predecessors, (895), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2023-11-12 01:02:58,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2023-11-12 01:02:58,861 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2023-11-12 01:02:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:58,862 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2023-11-12 01:02:58,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 01:02:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2023-11-12 01:02:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-12 01:02:58,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:58,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:02:58,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:02:58,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:58,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1816840210, now seen corresponding path program 1 times [2023-11-12 01:02:58,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:58,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736324811] [2023-11-12 01:02:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:58,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:02:59,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:59,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736324811] [2023-11-12 01:02:59,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736324811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:59,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:02:59,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 01:02:59,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374590655] [2023-11-12 01:02:59,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:59,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:02:59,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:59,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:02:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:02:59,433 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 01:03:03,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:03,224 INFO L93 Difference]: Finished difference Result 2737 states and 4450 transitions. [2023-11-12 01:03:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 01:03:03,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2023-11-12 01:03:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:03,253 INFO L225 Difference]: With dead ends: 2737 [2023-11-12 01:03:03,253 INFO L226 Difference]: Without dead ends: 1960 [2023-11-12 01:03:03,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-12 01:03:03,262 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 1359 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 4042 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 4675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 4042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:03,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 2156 Invalid, 4675 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [633 Valid, 4042 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-12 01:03:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2023-11-12 01:03:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1773. [2023-11-12 01:03:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1211 states have (on average 1.5763831544178366) internal successors, (1909), 1283 states have internal predecessors, (1909), 471 states have call successors, (471), 78 states have call predecessors, (471), 90 states have return successors, (490), 444 states have call predecessors, (490), 466 states have call successors, (490) [2023-11-12 01:03:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2870 transitions. [2023-11-12 01:03:03,433 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2870 transitions. Word has length 75 [2023-11-12 01:03:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:03,433 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2870 transitions. [2023-11-12 01:03:03,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 01:03:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2870 transitions. [2023-11-12 01:03:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-12 01:03:03,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:03,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:03:03,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:03,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1006056301, now seen corresponding path program 1 times [2023-11-12 01:03:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:03,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056398975] [2023-11-12 01:03:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:03,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:04,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:04,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056398975] [2023-11-12 01:03:04,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056398975] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:04,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:04,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-12 01:03:04,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400813571] [2023-11-12 01:03:04,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:04,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 01:03:04,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:04,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 01:03:04,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:03:04,051 INFO L87 Difference]: Start difference. First operand 1773 states and 2870 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-12 01:03:10,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:10,220 INFO L93 Difference]: Finished difference Result 4296 states and 7025 transitions. [2023-11-12 01:03:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-12 01:03:10,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 76 [2023-11-12 01:03:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:10,245 INFO L225 Difference]: With dead ends: 4296 [2023-11-12 01:03:10,246 INFO L226 Difference]: Without dead ends: 2541 [2023-11-12 01:03:10,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 01:03:10,269 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 2553 mSDsluCounter, 3628 mSDsCounter, 0 mSdLazyCounter, 6885 mSolverCounterSat, 1954 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2585 SdHoareTripleChecker+Valid, 4196 SdHoareTripleChecker+Invalid, 8839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1954 IncrementalHoareTripleChecker+Valid, 6885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:10,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2585 Valid, 4196 Invalid, 8839 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1954 Valid, 6885 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-12 01:03:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2023-11-12 01:03:10,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1799. [2023-11-12 01:03:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1233 states have (on average 1.5660989456609895) internal successors, (1931), 1305 states have internal predecessors, (1931), 471 states have call successors, (471), 82 states have call predecessors, (471), 94 states have return successors, (490), 444 states have call predecessors, (490), 466 states have call successors, (490) [2023-11-12 01:03:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2892 transitions. [2023-11-12 01:03:10,513 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2892 transitions. Word has length 76 [2023-11-12 01:03:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:10,514 INFO L495 AbstractCegarLoop]: Abstraction has 1799 states and 2892 transitions. [2023-11-12 01:03:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-12 01:03:10,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2892 transitions. [2023-11-12 01:03:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-12 01:03:10,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:10,519 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:10,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:03:10,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:10,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1066490649, now seen corresponding path program 1 times [2023-11-12 01:03:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:10,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314330407] [2023-11-12 01:03:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:03:11,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:11,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314330407] [2023-11-12 01:03:11,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314330407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:11,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:11,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 01:03:11,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334704752] [2023-11-12 01:03:11,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:11,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:03:11,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:11,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:03:11,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:03:11,035 INFO L87 Difference]: Start difference. First operand 1799 states and 2892 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-12 01:03:14,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:14,529 INFO L93 Difference]: Finished difference Result 5054 states and 8153 transitions. [2023-11-12 01:03:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 01:03:14,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2023-11-12 01:03:14,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:14,559 INFO L225 Difference]: With dead ends: 5054 [2023-11-12 01:03:14,559 INFO L226 Difference]: Without dead ends: 3273 [2023-11-12 01:03:14,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-12 01:03:14,577 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 1745 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 3565 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1810 SdHoareTripleChecker+Valid, 2547 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 3565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:14,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1810 Valid, 2547 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 3565 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-12 01:03:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2023-11-12 01:03:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3111. [2023-11-12 01:03:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2207 states have (on average 1.5894879927503398) internal successors, (3508), 2298 states have internal predecessors, (3508), 729 states have call successors, (729), 144 states have call predecessors, (729), 174 states have return successors, (792), 712 states have call predecessors, (792), 724 states have call successors, (792) [2023-11-12 01:03:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5029 transitions. [2023-11-12 01:03:14,928 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5029 transitions. Word has length 78 [2023-11-12 01:03:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:14,929 INFO L495 AbstractCegarLoop]: Abstraction has 3111 states and 5029 transitions. [2023-11-12 01:03:14,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2023-11-12 01:03:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5029 transitions. [2023-11-12 01:03:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-12 01:03:14,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:14,933 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:14,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:03:14,934 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:14,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:14,934 INFO L85 PathProgramCache]: Analyzing trace with hash 931378961, now seen corresponding path program 1 times [2023-11-12 01:03:14,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:14,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118015945] [2023-11-12 01:03:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:14,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:03:15,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:15,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118015945] [2023-11-12 01:03:15,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118015945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:15,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:15,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:03:15,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461807877] [2023-11-12 01:03:15,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:15,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:03:15,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:15,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:03:15,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:03:15,223 INFO L87 Difference]: Start difference. First operand 3111 states and 5029 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 01:03:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:15,665 INFO L93 Difference]: Finished difference Result 5558 states and 9001 transitions. [2023-11-12 01:03:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:03:15,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2023-11-12 01:03:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:15,694 INFO L225 Difference]: With dead ends: 5558 [2023-11-12 01:03:15,695 INFO L226 Difference]: Without dead ends: 3223 [2023-11-12 01:03:15,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:03:15,743 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 7 mSDsluCounter, 2774 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:15,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3336 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:03:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2023-11-12 01:03:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3181. [2023-11-12 01:03:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 2257 states have (on average 1.5764288879042978) internal successors, (3558), 2348 states have internal predecessors, (3558), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 732 states have call predecessors, (842), 724 states have call successors, (842) [2023-11-12 01:03:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 5129 transitions. [2023-11-12 01:03:16,043 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 5129 transitions. Word has length 83 [2023-11-12 01:03:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:16,043 INFO L495 AbstractCegarLoop]: Abstraction has 3181 states and 5129 transitions. [2023-11-12 01:03:16,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 01:03:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 5129 transitions. [2023-11-12 01:03:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-12 01:03:16,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:16,048 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:16,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:03:16,048 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:16,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash 812966193, now seen corresponding path program 1 times [2023-11-12 01:03:16,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:16,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713218181] [2023-11-12 01:03:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:03:17,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713218181] [2023-11-12 01:03:17,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713218181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:17,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:17,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:03:17,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680376515] [2023-11-12 01:03:17,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:17,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:03:17,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:17,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:03:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:03:17,835 INFO L87 Difference]: Start difference. First operand 3181 states and 5129 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-12 01:03:22,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:22,459 INFO L93 Difference]: Finished difference Result 10200 states and 16599 transitions. [2023-11-12 01:03:22,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 01:03:22,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 83 [2023-11-12 01:03:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:22,525 INFO L225 Difference]: With dead ends: 10200 [2023-11-12 01:03:22,526 INFO L226 Difference]: Without dead ends: 7037 [2023-11-12 01:03:22,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:03:22,548 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 2190 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 2784 mSolverCounterSat, 959 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2262 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 3743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 959 IncrementalHoareTripleChecker+Valid, 2784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:22,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2262 Valid, 1690 Invalid, 3743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [959 Valid, 2784 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-12 01:03:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7037 states. [2023-11-12 01:03:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7037 to 6396. [2023-11-12 01:03:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6396 states, 4528 states have (on average 1.5554328621908127) internal successors, (7043), 4743 states have internal predecessors, (7043), 1472 states have call successors, (1472), 292 states have call predecessors, (1472), 395 states have return successors, (1728), 1472 states have call predecessors, (1728), 1467 states have call successors, (1728) [2023-11-12 01:03:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6396 states to 6396 states and 10243 transitions. [2023-11-12 01:03:23,794 INFO L78 Accepts]: Start accepts. Automaton has 6396 states and 10243 transitions. Word has length 83 [2023-11-12 01:03:23,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:23,795 INFO L495 AbstractCegarLoop]: Abstraction has 6396 states and 10243 transitions. [2023-11-12 01:03:23,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-11-12 01:03:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 6396 states and 10243 transitions. [2023-11-12 01:03:23,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-12 01:03:23,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:23,804 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:23,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:03:23,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:23,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:23,805 INFO L85 PathProgramCache]: Analyzing trace with hash 303380405, now seen corresponding path program 1 times [2023-11-12 01:03:23,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:23,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314116314] [2023-11-12 01:03:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:23,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:03:24,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:24,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314116314] [2023-11-12 01:03:24,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314116314] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:24,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:24,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 01:03:24,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906154777] [2023-11-12 01:03:24,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:03:24,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:03:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:03:24,068 INFO L87 Difference]: Start difference. First operand 6396 states and 10243 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 01:03:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:03:25,078 INFO L93 Difference]: Finished difference Result 11377 states and 18231 transitions. [2023-11-12 01:03:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:03:25,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2023-11-12 01:03:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:03:25,140 INFO L225 Difference]: With dead ends: 11377 [2023-11-12 01:03:25,140 INFO L226 Difference]: Without dead ends: 6580 [2023-11-12 01:03:25,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:03:25,169 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 6 mSDsluCounter, 2789 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:03:25,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3355 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:03:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6580 states. [2023-11-12 01:03:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6580 to 6431. [2023-11-12 01:03:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6431 states, 4557 states have (on average 1.5518981786262893) internal successors, (7072), 4755 states have internal predecessors, (7072), 1472 states have call successors, (1472), 292 states have call predecessors, (1472), 401 states have return successors, (1740), 1495 states have call predecessors, (1740), 1467 states have call successors, (1740) [2023-11-12 01:03:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6431 states to 6431 states and 10284 transitions. [2023-11-12 01:03:26,164 INFO L78 Accepts]: Start accepts. Automaton has 6431 states and 10284 transitions. Word has length 82 [2023-11-12 01:03:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:03:26,164 INFO L495 AbstractCegarLoop]: Abstraction has 6431 states and 10284 transitions. [2023-11-12 01:03:26,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 01:03:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 6431 states and 10284 transitions. [2023-11-12 01:03:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-12 01:03:26,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:26,170 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:26,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 01:03:26,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:26,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash 593634466, now seen corresponding path program 1 times [2023-11-12 01:03:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818871127] [2023-11-12 01:03:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:03:26,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:26,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818871127] [2023-11-12 01:03:26,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818871127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:26,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:26,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 01:03:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168752491] [2023-11-12 01:03:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:26,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:03:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:03:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:03:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:03:26,645 INFO L87 Difference]: Start difference. First operand 6431 states and 10284 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15)