./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire --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 d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:59,288 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:59,407 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:32:59,420 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:59,421 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:59,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:59,462 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:59,463 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:59,464 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:59,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:59,470 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:59,471 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:59,471 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:59,473 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:59,474 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:59,474 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:59,475 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:59,475 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:59,475 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:59,476 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:59,477 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:59,477 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:59,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:59,479 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:32:59,480 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:32:59,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:59,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:32:59,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:59,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:32:59,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:59,485 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:32:59,485 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:32:59,485 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:32:59,485 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:59,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:59,485 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:59,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:59,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:59,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:59,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:59,487 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:32:59,487 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:59,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:59,488 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:59,489 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:32:59,489 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:59,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:59,490 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_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d29c49d66a80c5cce6b00f5730e0d825d56678e7df63108e14ba577a66cb87d7 [2023-11-23 20:32:59,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:59,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:59,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:59,831 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:59,832 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:59,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2023-11-23 20:33:03,240 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:03,743 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:03,747 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c [2023-11-23 20:33:03,788 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/data/2b3020db9/f77a59dce03d42258a0683d9507de85d/FLAGcec4613f4 [2023-11-23 20:33:03,811 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/data/2b3020db9/f77a59dce03d42258a0683d9507de85d [2023-11-23 20:33:03,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:03,821 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:03,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:03,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:03,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:03,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:03" (1/1) ... [2023-11-23 20:33:03,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c328089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:03, skipping insertion in model container [2023-11-23 20:33:03,836 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:03" (1/1) ... [2023-11-23 20:33:03,937 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:04,195 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_470ad02a-ed55-41e8-9a77-d52438225c69/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2023-11-23 20:33:04,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:04,824 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:04,837 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [48] [2023-11-23 20:33:04,840 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [169] [2023-11-23 20:33:04,840 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [185] [2023-11-23 20:33:04,841 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [194] [2023-11-23 20:33:04,841 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [1871] [2023-11-23 20:33:04,841 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2228] [2023-11-23 20:33:04,842 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [2263] [2023-11-23 20:33:04,842 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2444] [2023-11-23 20:33:04,842 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2810] [2023-11-23 20:33:04,843 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3475] [2023-11-23 20:33:04,858 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_470ad02a-ed55-41e8-9a77-d52438225c69/sv-benchmarks/c/product-lines/elevator_spec1_product32.cil.c[4316,4329] [2023-11-23 20:33:04,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:05,028 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:05,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05 WrapperNode [2023-11-23 20:33:05,029 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:05,030 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:05,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:05,031 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:05,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,187 INFO L138 Inliner]: procedures = 99, calls = 356, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 969 [2023-11-23 20:33:05,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:05,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:05,200 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:05,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:05,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,228 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,264 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,284 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,292 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,301 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:05,345 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:05,345 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:05,345 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:05,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (1/1) ... [2023-11-23 20:33:05,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:05,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:05,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:05,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 20:33:05,441 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 20:33:05,441 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 20:33:05,442 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 20:33:05,442 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 20:33:05,442 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 20:33:05,443 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-23 20:33:05,443 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-23 20:33:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 20:33:05,444 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 20:33:05,444 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 20:33:05,444 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 20:33:05,446 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 20:33:05,446 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 20:33:05,447 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-23 20:33:05,447 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-23 20:33:05,450 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-23 20:33:05,450 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-23 20:33:05,451 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 20:33:05,451 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 20:33:05,451 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 20:33:05,451 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 20:33:05,451 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-23 20:33:05,452 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-23 20:33:05,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:05,452 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-23 20:33:05,452 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-11-23 20:33:05,452 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-23 20:33:05,453 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-23 20:33:05,453 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-23 20:33:05,453 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-23 20:33:05,453 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 20:33:05,453 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 20:33:05,454 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:33:05,454 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:33:05,454 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-23 20:33:05,454 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-23 20:33:05,454 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 20:33:05,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 20:33:05,455 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 20:33:05,455 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 20:33:05,455 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 20:33:05,455 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 20:33:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 20:33:05,456 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 20:33:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 20:33:05,456 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 20:33:05,456 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 20:33:05,457 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 20:33:05,458 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 20:33:05,459 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 20:33:05,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:05,460 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 20:33:05,460 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 20:33:05,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:05,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:05,461 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 20:33:05,461 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 20:33:05,461 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-11-23 20:33:05,462 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-11-23 20:33:05,704 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:05,708 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:07,362 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:08,733 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:08,734 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:33:08,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:08 BoogieIcfgContainer [2023-11-23 20:33:08,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:08,740 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:08,740 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:08,744 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:08,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:03" (1/3) ... [2023-11-23 20:33:08,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765687fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:08, skipping insertion in model container [2023-11-23 20:33:08,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:05" (2/3) ... [2023-11-23 20:33:08,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765687fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:08, skipping insertion in model container [2023-11-23 20:33:08,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:08" (3/3) ... [2023-11-23 20:33:08,752 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product32.cil.c [2023-11-23 20:33:08,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:08,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:33:08,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:08,910 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;@60dfbef5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:08,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:33:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-23 20:33:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:33:08,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:08,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:08,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:08,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1359182888, now seen corresponding path program 1 times [2023-11-23 20:33:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:08,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62303590] [2023-11-23 20:33:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:08,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:33:10,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:10,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62303590] [2023-11-23 20:33:10,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62303590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:10,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:10,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:33:10,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853225930] [2023-11-23 20:33:10,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:10,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:33:10,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:33:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:10,618 INFO L87 Difference]: Start difference. First operand has 413 states, 275 states have (on average 1.5672727272727274) internal successors, (431), 298 states have internal predecessors, (431), 108 states have call successors, (108), 28 states have call predecessors, (108), 28 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-23 20:33:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:14,075 INFO L93 Difference]: Finished difference Result 1329 states and 2129 transitions. [2023-11-23 20:33:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:33:14,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 54 [2023-11-23 20:33:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:14,120 INFO L225 Difference]: With dead ends: 1329 [2023-11-23 20:33:14,120 INFO L226 Difference]: Without dead ends: 933 [2023-11-23 20:33:14,134 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 [2023-11-23 20:33:14,141 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1701 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:14,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1775 Valid, 903 Invalid, 2122 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [663 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 20:33:14,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2023-11-23 20:33:14,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 846. [2023-11-23 20:33:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 589 states have (on average 1.5823429541595926) internal successors, (932), 619 states have internal predecessors, (932), 207 states have call successors, (207), 48 states have call predecessors, (207), 49 states have return successors, (209), 191 states have call predecessors, (209), 202 states have call successors, (209) [2023-11-23 20:33:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1348 transitions. [2023-11-23 20:33:14,381 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1348 transitions. Word has length 54 [2023-11-23 20:33:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:14,382 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1348 transitions. [2023-11-23 20:33:14,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-23 20:33:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1348 transitions. [2023-11-23 20:33:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 20:33:14,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:14,406 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:14,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:33:14,406 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:14,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:14,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1020386867, now seen corresponding path program 1 times [2023-11-23 20:33:14,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:14,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753791027] [2023-11-23 20:33:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:14,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:33:15,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:15,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753791027] [2023-11-23 20:33:15,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753791027] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:15,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:15,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:33:15,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724913733] [2023-11-23 20:33:15,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:15,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:33:15,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:15,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:33:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:33:15,204 INFO L87 Difference]: Start difference. First operand 846 states and 1348 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 20:33:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:18,287 INFO L93 Difference]: Finished difference Result 2624 states and 4232 transitions. [2023-11-23 20:33:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:33:18,288 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), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 99 [2023-11-23 20:33:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:18,310 INFO L225 Difference]: With dead ends: 2624 [2023-11-23 20:33:18,310 INFO L226 Difference]: Without dead ends: 1802 [2023-11-23 20:33:18,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:33:18,320 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1229 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:18,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 1659 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-23 20:33:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2023-11-23 20:33:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1715. [2023-11-23 20:33:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1206 states have (on average 1.5887230514096187) internal successors, (1916), 1262 states have internal predecessors, (1916), 409 states have call successors, (409), 92 states have call predecessors, (409), 99 states have return successors, (436), 384 states have call predecessors, (436), 404 states have call successors, (436) [2023-11-23 20:33:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2761 transitions. [2023-11-23 20:33:18,550 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2761 transitions. Word has length 99 [2023-11-23 20:33:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:18,553 INFO L495 AbstractCegarLoop]: Abstraction has 1715 states and 2761 transitions. [2023-11-23 20:33:18,553 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), 5 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2023-11-23 20:33:18,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2761 transitions. [2023-11-23 20:33:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 20:33:18,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:18,562 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:18,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:33:18,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:18,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:18,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2039789219, now seen corresponding path program 1 times [2023-11-23 20:33:18,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:18,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763396754] [2023-11-23 20:33:18,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:18,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:33:19,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:19,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763396754] [2023-11-23 20:33:19,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763396754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:19,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:19,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 20:33:19,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292793233] [2023-11-23 20:33:19,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:19,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:33:19,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:19,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:33:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:33:19,353 INFO L87 Difference]: Start difference. First operand 1715 states and 2761 transitions. Second operand has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-23 20:33:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:23,559 INFO L93 Difference]: Finished difference Result 4328 states and 6952 transitions. [2023-11-23 20:33:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 20:33:23,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 102 [2023-11-23 20:33:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:23,595 INFO L225 Difference]: With dead ends: 4328 [2023-11-23 20:33:23,595 INFO L226 Difference]: Without dead ends: 2636 [2023-11-23 20:33:23,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-23 20:33:23,608 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 1065 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 5371 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 5707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 5371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:23,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 2829 Invalid, 5707 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [336 Valid, 5371 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-23 20:33:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2023-11-23 20:33:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2553. [2023-11-23 20:33:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 1780 states have (on average 1.5719101123595505) internal successors, (2798), 1858 states have internal predecessors, (2798), 615 states have call successors, (615), 138 states have call predecessors, (615), 157 states have return successors, (660), 589 states have call predecessors, (660), 610 states have call successors, (660) [2023-11-23 20:33:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 4073 transitions. [2023-11-23 20:33:23,836 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 4073 transitions. Word has length 102 [2023-11-23 20:33:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:23,837 INFO L495 AbstractCegarLoop]: Abstraction has 2553 states and 4073 transitions. [2023-11-23 20:33:23,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-23 20:33:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 4073 transitions. [2023-11-23 20:33:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 20:33:23,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:23,842 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:23,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:33:23,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:23,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash 604984836, now seen corresponding path program 1 times [2023-11-23 20:33:23,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:23,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658905737] [2023-11-23 20:33:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:23,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:33:24,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:24,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658905737] [2023-11-23 20:33:24,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658905737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:24,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:24,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:33:24,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30766554] [2023-11-23 20:33:24,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:24,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:33:24,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:24,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:33:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:24,315 INFO L87 Difference]: Start difference. First operand 2553 states and 4073 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:33:25,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:25,298 INFO L93 Difference]: Finished difference Result 2654 states and 4241 transitions. [2023-11-23 20:33:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:25,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 103 [2023-11-23 20:33:25,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:25,320 INFO L225 Difference]: With dead ends: 2654 [2023-11-23 20:33:25,320 INFO L226 Difference]: Without dead ends: 2639 [2023-11-23 20:33:25,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:33:25,332 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 729 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1957 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:25,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1957 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:33:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2023-11-23 20:33:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2559. [2023-11-23 20:33:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 1786 states have (on average 1.5699888017917134) internal successors, (2804), 1864 states have internal predecessors, (2804), 615 states have call successors, (615), 138 states have call predecessors, (615), 157 states have return successors, (660), 589 states have call predecessors, (660), 610 states have call successors, (660) [2023-11-23 20:33:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 4079 transitions. [2023-11-23 20:33:25,602 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 4079 transitions. Word has length 103 [2023-11-23 20:33:25,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:25,603 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 4079 transitions. [2023-11-23 20:33:25,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 20:33:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 4079 transitions. [2023-11-23 20:33:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-23 20:33:25,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:25,608 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:25,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:33:25,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:25,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash -197132796, now seen corresponding path program 1 times [2023-11-23 20:33:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:25,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917478384] [2023-11-23 20:33:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:25,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:33:26,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:26,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917478384] [2023-11-23 20:33:26,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917478384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:26,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:26,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:33:26,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971988251] [2023-11-23 20:33:26,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:26,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:33:26,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:26,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:33:26,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:33:26,165 INFO L87 Difference]: Start difference. First operand 2559 states and 4079 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-23 20:33:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:27,055 INFO L93 Difference]: Finished difference Result 2704 states and 4284 transitions. [2023-11-23 20:33:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:33:27,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 108 [2023-11-23 20:33:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:27,081 INFO L225 Difference]: With dead ends: 2704 [2023-11-23 20:33:27,081 INFO L226 Difference]: Without dead ends: 2689 [2023-11-23 20:33:27,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:33:27,085 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 662 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:27,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 2862 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:33:27,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2023-11-23 20:33:27,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2635. [2023-11-23 20:33:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1838 states have (on average 1.5625680087051144) internal successors, (2872), 1916 states have internal predecessors, (2872), 631 states have call successors, (631), 146 states have call predecessors, (631), 165 states have return successors, (686), 605 states have call predecessors, (686), 626 states have call successors, (686) [2023-11-23 20:33:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4189 transitions. [2023-11-23 20:33:27,396 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4189 transitions. Word has length 108 [2023-11-23 20:33:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:27,398 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4189 transitions. [2023-11-23 20:33:27,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-23 20:33:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4189 transitions. [2023-11-23 20:33:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-23 20:33:27,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:27,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:27,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:33:27,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:27,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1803786760, now seen corresponding path program 1 times [2023-11-23 20:33:27,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:27,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011571062] [2023-11-23 20:33:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:27,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:33:33,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:33,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011571062] [2023-11-23 20:33:33,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011571062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:33,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892216136] [2023-11-23 20:33:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:33,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:33,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:33,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:33,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 2057 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-23 20:33:33,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 20:33:34,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:34,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892216136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:34,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:34,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [26] total 34 [2023-11-23 20:33:34,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945577660] [2023-11-23 20:33:34,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:34,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 20:33:34,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:35,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 20:33:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 20:33:35,001 INFO L87 Difference]: Start difference. First operand 2635 states and 4189 transitions. Second operand has 10 states, 6 states have (on average 10.333333333333334) internal successors, (62), 8 states have internal predecessors, (62), 6 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 20:33:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:38,330 INFO L93 Difference]: Finished difference Result 5195 states and 8307 transitions. [2023-11-23 20:33:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 20:33:38,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 10.333333333333334) internal successors, (62), 8 states have internal predecessors, (62), 6 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 115 [2023-11-23 20:33:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:38,356 INFO L225 Difference]: With dead ends: 5195 [2023-11-23 20:33:38,356 INFO L226 Difference]: Without dead ends: 2583 [2023-11-23 20:33:38,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 20:33:38,376 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 804 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 3785 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 4180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 3785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:38,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 571 Invalid, 4180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 3785 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-23 20:33:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2023-11-23 20:33:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2583. [2023-11-23 20:33:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 1804 states have (on average 1.5537694013303769) internal successors, (2803), 1881 states have internal predecessors, (2803), 613 states have call successors, (613), 146 states have call predecessors, (613), 165 states have return successors, (669), 588 states have call predecessors, (669), 609 states have call successors, (669) [2023-11-23 20:33:38,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 4085 transitions. [2023-11-23 20:33:38,657 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 4085 transitions. Word has length 115 [2023-11-23 20:33:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:38,659 INFO L495 AbstractCegarLoop]: Abstraction has 2583 states and 4085 transitions. [2023-11-23 20:33:38,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 10.333333333333334) internal successors, (62), 8 states have internal predecessors, (62), 6 states have call successors, (22), 3 states have call predecessors, (22), 4 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-23 20:33:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 4085 transitions. [2023-11-23 20:33:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-23 20:33:38,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:38,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:38,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:33:38,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470ad02a-ed55-41e8-9a77-d52438225c69/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:38,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:38,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash -83112337, now seen corresponding path program 1 times [2023-11-23 20:33:38,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:38,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321361713] [2023-11-23 20:33:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:38,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:33:40,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:40,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321361713] [2023-11-23 20:33:40,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321361713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:40,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:40,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-23 20:33:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302109333] [2023-11-23 20:33:40,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:40,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 20:33:40,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:40,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 20:33:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:33:40,613 INFO L87 Difference]: Start difference. First operand 2583 states and 4085 transitions. Second operand has 14 states, 11 states have (on average 5.909090909090909) internal successors, (65), 12 states have internal predecessors, (65), 6 states have call successors, (22), 4 states have call predecessors, (22), 7 states have return successors, (21), 8 states have call predecessors, (21), 5 states have call successors, (21)