./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.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_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/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_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/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_699ee55d-a507-4d6d-b7db-4c1ee0495333/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 f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:23,816 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:23,894 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:36:23,900 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:23,901 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:23,928 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:23,928 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:23,929 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:23,930 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:23,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:23,931 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:23,932 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:23,932 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:23,933 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:23,933 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:23,934 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:23,935 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:23,935 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:23,936 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:23,937 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:23,937 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:23,938 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:23,939 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:23,940 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:23,940 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:23,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:23,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:23,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:23,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:23,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:23,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:23,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:23,945 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:23,945 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:23,946 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:23,946 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:23,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:23,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:23,947 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:23,948 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:23,948 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:23,948 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:23,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:23,949 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:23,949 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:23,949 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:23,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:23,950 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_699ee55d-a507-4d6d-b7db-4c1ee0495333/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2023-11-23 20:36:24,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:24,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:24,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:24,273 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:24,273 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:24,275 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2023-11-23 20:36:27,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:27,901 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:27,904 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2023-11-23 20:36:27,936 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/data/ca60b6419/8720772e77044f0f83975df86f371a0a/FLAG9da9c7a20 [2023-11-23 20:36:27,952 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/data/ca60b6419/8720772e77044f0f83975df86f371a0a [2023-11-23 20:36:27,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:27,957 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:27,958 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:27,959 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:27,971 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:27,972 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:27" (1/1) ... [2023-11-23 20:36:27,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f1f5be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:27, skipping insertion in model container [2023-11-23 20:36:27,974 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:27" (1/1) ... [2023-11-23 20:36:28,063 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:28,292 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_699ee55d-a507-4d6d-b7db-4c1ee0495333/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2023-11-23 20:36:28,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:28,799 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:28,810 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2023-11-23 20:36:28,812 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [68] [2023-11-23 20:36:28,813 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [77] [2023-11-23 20:36:28,817 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [443] [2023-11-23 20:36:28,818 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2020] [2023-11-23 20:36:28,818 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2682] [2023-11-23 20:36:28,819 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2775] [2023-11-23 20:36:28,820 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2893] [2023-11-23 20:36:28,820 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2931] [2023-11-23 20:36:28,820 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [3279] [2023-11-23 20:36:28,832 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_699ee55d-a507-4d6d-b7db-4c1ee0495333/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2023-11-23 20:36:28,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:29,023 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:29,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29 WrapperNode [2023-11-23 20:36:29,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:29,026 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:29,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:29,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:29,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,066 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,124 INFO L138 Inliner]: procedures = 92, calls = 344, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 838 [2023-11-23 20:36:29,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:29,126 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:29,126 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:29,126 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:29,136 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,144 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,145 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,183 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,188 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,204 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:29,205 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:29,205 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:29,206 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:29,206 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (1/1) ... [2023-11-23 20:36:29,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:29,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:29,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:29,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:29,312 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-23 20:36:29,313 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-23 20:36:29,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:29,313 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-23 20:36:29,313 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-23 20:36:29,313 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-23 20:36:29,314 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-23 20:36:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-11-23 20:36:29,314 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-11-23 20:36:29,314 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 20:36:29,314 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 20:36:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 20:36:29,315 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 20:36:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-23 20:36:29,315 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-23 20:36:29,315 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 20:36:29,316 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 20:36:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 20:36:29,316 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 20:36:29,316 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 20:36:29,316 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 20:36:29,317 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 20:36:29,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 20:36:29,317 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 20:36:29,317 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 20:36:29,317 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 20:36:29,317 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 20:36:29,318 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 20:36:29,318 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 20:36:29,318 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 20:36:29,318 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 20:36:29,318 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 20:36:29,319 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 20:36:29,319 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 20:36:29,319 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 20:36:29,319 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 20:36:29,319 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 20:36:29,320 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 20:36:29,320 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 20:36:29,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:29,320 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-23 20:36:29,320 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-23 20:36:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 20:36:29,321 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 20:36:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 20:36:29,321 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 20:36:29,321 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 20:36:29,321 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 20:36:29,322 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2023-11-23 20:36:29,322 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2023-11-23 20:36:29,322 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-11-23 20:36:29,322 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-11-23 20:36:29,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:29,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:29,323 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 20:36:29,323 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 20:36:29,493 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:29,495 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:30,863 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:31,858 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:31,859 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 20:36:31,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:31 BoogieIcfgContainer [2023-11-23 20:36:31,861 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:31,864 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:31,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:31,868 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:31,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:27" (1/3) ... [2023-11-23 20:36:31,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb98019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:31, skipping insertion in model container [2023-11-23 20:36:31,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:29" (2/3) ... [2023-11-23 20:36:31,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb98019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:31, skipping insertion in model container [2023-11-23 20:36:31,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:31" (3/3) ... [2023-11-23 20:36:31,873 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2023-11-23 20:36:31,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:31,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:36:31,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:31,994 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;@46c438fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:31,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:36:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-23 20:36:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:36:32,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:32,042 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-11-23 20:36:32,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:32,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:32,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1493586038, now seen corresponding path program 1 times [2023-11-23 20:36:32,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:32,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78369614] [2023-11-23 20:36:32,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:32,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 20:36:32,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78369614] [2023-11-23 20:36:32,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78369614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:32,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818035193] [2023-11-23 20:36:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:32,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:32,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:32,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:32,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:36:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:33,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 20:36:33,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:36:33,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:33,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818035193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:33,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:33,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-11-23 20:36:33,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031830285] [2023-11-23 20:36:33,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:33,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:36:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:36:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:36:33,082 INFO L87 Difference]: Start difference. First operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 20:36:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:33,272 INFO L93 Difference]: Finished difference Result 816 states and 1311 transitions. [2023-11-23 20:36:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:36:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 58 [2023-11-23 20:36:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:33,293 INFO L225 Difference]: With dead ends: 816 [2023-11-23 20:36:33,293 INFO L226 Difference]: Without dead ends: 410 [2023-11-23 20:36:33,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:36:33,310 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:33,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 616 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:33,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-23 20:36:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2023-11-23 20:36:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 283 states have (on average 1.5724381625441697) internal successors, (445), 301 states have internal predecessors, (445), 102 states have call successors, (102), 26 states have call predecessors, (102), 24 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-23 20:36:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 646 transitions. [2023-11-23 20:36:33,396 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 646 transitions. Word has length 58 [2023-11-23 20:36:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:33,397 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 646 transitions. [2023-11-23 20:36:33,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 20:36:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 646 transitions. [2023-11-23 20:36:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:36:33,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:33,413 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-11-23 20:36:33,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:33,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 20:36:33,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:33,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash 737244586, now seen corresponding path program 1 times [2023-11-23 20:36:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:33,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733730847] [2023-11-23 20:36:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:33,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:34,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:34,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733730847] [2023-11-23 20:36:34,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733730847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:34,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:34,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:36:34,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726919339] [2023-11-23 20:36:34,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:34,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:34,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:34,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:34,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:34,284 INFO L87 Difference]: Start difference. First operand 410 states and 646 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:36:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:34,734 INFO L93 Difference]: Finished difference Result 1198 states and 1910 transitions. [2023-11-23 20:36:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:34,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2023-11-23 20:36:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:34,743 INFO L225 Difference]: With dead ends: 1198 [2023-11-23 20:36:34,746 INFO L226 Difference]: Without dead ends: 803 [2023-11-23 20:36:34,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:34,751 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 618 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:34,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1225 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-23 20:36:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 765. [2023-11-23 20:36:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 545 states have (on average 1.5926605504587157) internal successors, (868), 572 states have internal predecessors, (868), 176 states have call successors, (176), 46 states have call predecessors, (176), 43 states have return successors, (179), 161 states have call predecessors, (179), 172 states have call successors, (179) [2023-11-23 20:36:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1223 transitions. [2023-11-23 20:36:34,861 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1223 transitions. Word has length 58 [2023-11-23 20:36:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:34,861 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 1223 transitions. [2023-11-23 20:36:34,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:36:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1223 transitions. [2023-11-23 20:36:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 20:36:34,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:34,872 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-11-23 20:36:34,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:36:34,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:34,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:34,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1523938287, now seen corresponding path program 1 times [2023-11-23 20:36:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:34,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18128302] [2023-11-23 20:36:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:35,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:35,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18128302] [2023-11-23 20:36:35,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18128302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:35,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:35,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:36:35,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133621262] [2023-11-23 20:36:35,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:35,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:35,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:35,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:35,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:35,409 INFO L87 Difference]: Start difference. First operand 765 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-23 20:36:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:35,703 INFO L93 Difference]: Finished difference Result 1882 states and 3008 transitions. [2023-11-23 20:36:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2023-11-23 20:36:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:35,723 INFO L225 Difference]: With dead ends: 1882 [2023-11-23 20:36:35,723 INFO L226 Difference]: Without dead ends: 1132 [2023-11-23 20:36:35,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:35,736 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 465 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:35,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1951 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:36:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2023-11-23 20:36:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1102. [2023-11-23 20:36:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 791 states have (on average 1.563843236409608) internal successors, (1237), 817 states have internal predecessors, (1237), 245 states have call successors, (245), 66 states have call predecessors, (245), 65 states have return successors, (273), 232 states have call predecessors, (273), 239 states have call successors, (273) [2023-11-23 20:36:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1755 transitions. [2023-11-23 20:36:35,858 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1755 transitions. Word has length 87 [2023-11-23 20:36:35,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:35,860 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1755 transitions. [2023-11-23 20:36:35,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-23 20:36:35,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1755 transitions. [2023-11-23 20:36:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 20:36:35,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:35,866 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-11-23 20:36:35,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:36:35,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:35,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash 849821183, now seen corresponding path program 1 times [2023-11-23 20:36:35,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:35,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051682704] [2023-11-23 20:36:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:35,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:36,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:36,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051682704] [2023-11-23 20:36:36,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051682704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:36,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:36,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 20:36:36,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358268456] [2023-11-23 20:36:36,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:36,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:36:36,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:36:36,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:36:36,455 INFO L87 Difference]: Start difference. First operand 1102 states and 1755 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, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-23 20:36:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:40,730 INFO L93 Difference]: Finished difference Result 3527 states and 5664 transitions. [2023-11-23 20:36:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 20:36:40,731 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, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 88 [2023-11-23 20:36:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:40,763 INFO L225 Difference]: With dead ends: 3527 [2023-11-23 20:36:40,763 INFO L226 Difference]: Without dead ends: 2442 [2023-11-23 20:36:40,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-23 20:36:40,782 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1854 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 4637 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 5201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 4637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:40,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1938 Valid, 2684 Invalid, 5201 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [564 Valid, 4637 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-23 20:36:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2023-11-23 20:36:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2146. [2023-11-23 20:36:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2146 states, 1559 states have (on average 1.581783194355356) internal successors, (2466), 1604 states have internal predecessors, (2466), 455 states have call successors, (455), 122 states have call predecessors, (455), 131 states have return successors, (523), 446 states have call predecessors, (523), 447 states have call successors, (523) [2023-11-23 20:36:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3444 transitions. [2023-11-23 20:36:41,004 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3444 transitions. Word has length 88 [2023-11-23 20:36:41,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:41,005 INFO L495 AbstractCegarLoop]: Abstraction has 2146 states and 3444 transitions. [2023-11-23 20:36:41,005 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, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-11-23 20:36:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3444 transitions. [2023-11-23 20:36:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-23 20:36:41,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:41,011 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-11-23 20:36:41,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:36:41,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:41,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1036718534, now seen corresponding path program 1 times [2023-11-23 20:36:41,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:41,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263527686] [2023-11-23 20:36:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:41,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:41,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:41,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263527686] [2023-11-23 20:36:41,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263527686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:41,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:41,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:36:41,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72509746] [2023-11-23 20:36:41,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:41,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:36:41,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:41,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:36:41,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:36:41,389 INFO L87 Difference]: Start difference. First operand 2146 states and 3444 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, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 20:36:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:41,784 INFO L93 Difference]: Finished difference Result 3609 states and 5828 transitions. [2023-11-23 20:36:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:36:41,785 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, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2023-11-23 20:36:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:41,808 INFO L225 Difference]: With dead ends: 3609 [2023-11-23 20:36:41,809 INFO L226 Difference]: Without dead ends: 2216 [2023-11-23 20:36:41,824 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 [2023-11-23 20:36:41,827 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:41,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3649 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:36:41,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2023-11-23 20:36:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2188. [2023-11-23 20:36:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 1589 states have (on average 1.5707992448080554) internal successors, (2496), 1634 states have internal predecessors, (2496), 455 states have call successors, (455), 122 states have call predecessors, (455), 143 states have return successors, (553), 458 states have call predecessors, (553), 447 states have call successors, (553) [2023-11-23 20:36:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 3504 transitions. [2023-11-23 20:36:42,009 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 3504 transitions. Word has length 93 [2023-11-23 20:36:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:42,011 INFO L495 AbstractCegarLoop]: Abstraction has 2188 states and 3504 transitions. [2023-11-23 20:36:42,011 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, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 20:36:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 3504 transitions. [2023-11-23 20:36:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-23 20:36:42,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:42,018 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-11-23 20:36:42,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:36:42,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:42,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1801250221, now seen corresponding path program 1 times [2023-11-23 20:36:42,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:42,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734622990] [2023-11-23 20:36:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:42,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:42,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:42,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734622990] [2023-11-23 20:36:42,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734622990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:42,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:42,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:36:42,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447779032] [2023-11-23 20:36:42,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:42,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:36:42,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:42,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:36:42,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:36:42,442 INFO L87 Difference]: Start difference. First operand 2188 states and 3504 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, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 20:36:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:42,765 INFO L93 Difference]: Finished difference Result 3667 states and 5904 transitions. [2023-11-23 20:36:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:36:42,766 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, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2023-11-23 20:36:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:42,794 INFO L225 Difference]: With dead ends: 3667 [2023-11-23 20:36:42,795 INFO L226 Difference]: Without dead ends: 2246 [2023-11-23 20:36:42,808 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 [2023-11-23 20:36:42,809 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 7 mSDsluCounter, 3015 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:42,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3625 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:36:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2023-11-23 20:36:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2194. [2023-11-23 20:36:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1595 states have (on average 1.5686520376175548) internal successors, (2502), 1634 states have internal predecessors, (2502), 455 states have call successors, (455), 122 states have call predecessors, (455), 143 states have return successors, (553), 464 states have call predecessors, (553), 447 states have call successors, (553) [2023-11-23 20:36:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3510 transitions. [2023-11-23 20:36:42,981 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3510 transitions. Word has length 92 [2023-11-23 20:36:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:42,982 INFO L495 AbstractCegarLoop]: Abstraction has 2194 states and 3510 transitions. [2023-11-23 20:36:42,982 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, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 20:36:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3510 transitions. [2023-11-23 20:36:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-23 20:36:43,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:43,008 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-11-23 20:36:43,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:36:43,009 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:43,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash -173662182, now seen corresponding path program 1 times [2023-11-23 20:36:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:43,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948140868] [2023-11-23 20:36:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:43,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:43,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:43,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948140868] [2023-11-23 20:36:43,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948140868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:43,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:43,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:36:43,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006666087] [2023-11-23 20:36:43,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:43,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:36:43,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:43,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:36:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:36:43,451 INFO L87 Difference]: Start difference. First operand 2194 states and 3510 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, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 20:36:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:43,772 INFO L93 Difference]: Finished difference Result 3677 states and 5914 transitions. [2023-11-23 20:36:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:36:43,773 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, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2023-11-23 20:36:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:43,795 INFO L225 Difference]: With dead ends: 3677 [2023-11-23 20:36:43,796 INFO L226 Difference]: Without dead ends: 2252 [2023-11-23 20:36:43,809 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 [2023-11-23 20:36:43,810 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:43,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3649 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:36:43,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2023-11-23 20:36:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 2200. [2023-11-23 20:36:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 1601 states have (on average 1.566520924422236) internal successors, (2508), 1634 states have internal predecessors, (2508), 455 states have call successors, (455), 122 states have call predecessors, (455), 143 states have return successors, (553), 470 states have call predecessors, (553), 447 states have call successors, (553) [2023-11-23 20:36:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 3516 transitions. [2023-11-23 20:36:44,004 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 3516 transitions. Word has length 93 [2023-11-23 20:36:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:44,005 INFO L495 AbstractCegarLoop]: Abstraction has 2200 states and 3516 transitions. [2023-11-23 20:36:44,005 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, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 20:36:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 3516 transitions. [2023-11-23 20:36:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-23 20:36:44,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:44,013 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-11-23 20:36:44,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:36:44,014 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:44,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:44,015 INFO L85 PathProgramCache]: Analyzing trace with hash 531151874, now seen corresponding path program 1 times [2023-11-23 20:36:44,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:44,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108884221] [2023-11-23 20:36:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:44,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:44,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:44,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108884221] [2023-11-23 20:36:44,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108884221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:44,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:44,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:36:44,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913426911] [2023-11-23 20:36:44,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:44,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:36:44,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:36:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:36:44,408 INFO L87 Difference]: Start difference. First operand 2200 states and 3516 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-23 20:36:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:47,467 INFO L93 Difference]: Finished difference Result 5568 states and 9035 transitions. [2023-11-23 20:36:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:36:47,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2023-11-23 20:36:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:47,511 INFO L225 Difference]: With dead ends: 5568 [2023-11-23 20:36:47,512 INFO L226 Difference]: Without dead ends: 3897 [2023-11-23 20:36:47,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:36:47,537 INFO L413 NwaCegarLoop]: 915 mSDtfsCounter, 1477 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 2798 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1661 SdHoareTripleChecker+Valid, 2432 SdHoareTripleChecker+Invalid, 3004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:47,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1661 Valid, 2432 Invalid, 3004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2798 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-23 20:36:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2023-11-23 20:36:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3405. [2023-11-23 20:36:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3405 states, 2446 states have (on average 1.5282093213409649) internal successors, (3738), 2503 states have internal predecessors, (3738), 722 states have call successors, (722), 204 states have call predecessors, (722), 236 states have return successors, (900), 737 states have call predecessors, (900), 710 states have call successors, (900) [2023-11-23 20:36:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 5360 transitions. [2023-11-23 20:36:47,857 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 5360 transitions. Word has length 97 [2023-11-23 20:36:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:47,857 INFO L495 AbstractCegarLoop]: Abstraction has 3405 states and 5360 transitions. [2023-11-23 20:36:47,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-23 20:36:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 5360 transitions. [2023-11-23 20:36:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-23 20:36:47,865 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:47,865 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-11-23 20:36:47,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:36:47,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:47,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:47,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2087570594, now seen corresponding path program 1 times [2023-11-23 20:36:47,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:47,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795808608] [2023-11-23 20:36:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:47,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:48,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:48,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795808608] [2023-11-23 20:36:48,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795808608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:48,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:48,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:36:48,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309591830] [2023-11-23 20:36:48,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:48,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:36:48,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:48,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:36:48,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:36:48,405 INFO L87 Difference]: Start difference. First operand 3405 states and 5360 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-23 20:36:49,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:49,196 INFO L93 Difference]: Finished difference Result 6789 states and 10872 transitions. [2023-11-23 20:36:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 20:36:49,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2023-11-23 20:36:49,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:49,228 INFO L225 Difference]: With dead ends: 6789 [2023-11-23 20:36:49,228 INFO L226 Difference]: Without dead ends: 3865 [2023-11-23 20:36:49,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:36:49,261 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 723 mSDsluCounter, 4170 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 4975 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:49,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 4975 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:36:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3865 states. [2023-11-23 20:36:49,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3865 to 3813. [2023-11-23 20:36:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 2822 states have (on average 1.5329553508150249) internal successors, (4326), 2891 states have internal predecessors, (4326), 732 states have call successors, (732), 214 states have call predecessors, (732), 258 states have return successors, (910), 747 states have call predecessors, (910), 720 states have call successors, (910) [2023-11-23 20:36:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 5968 transitions. [2023-11-23 20:36:49,584 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 5968 transitions. Word has length 100 [2023-11-23 20:36:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:49,586 INFO L495 AbstractCegarLoop]: Abstraction has 3813 states and 5968 transitions. [2023-11-23 20:36:49,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-23 20:36:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 5968 transitions. [2023-11-23 20:36:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 20:36:49,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:49,594 INFO L195 NwaCegarLoop]: trace histogram [2, 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 20:36:49,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:36:49,595 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:49,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1405409543, now seen corresponding path program 1 times [2023-11-23 20:36:49,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:49,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389803820] [2023-11-23 20:36:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:50,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:50,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389803820] [2023-11-23 20:36:50,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389803820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:50,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:36:50,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888213478] [2023-11-23 20:36:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:50,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:36:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:36:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:36:50,072 INFO L87 Difference]: Start difference. First operand 3813 states and 5968 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-23 20:36:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:53,135 INFO L93 Difference]: Finished difference Result 7721 states and 12248 transitions. [2023-11-23 20:36:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:36:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2023-11-23 20:36:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:53,185 INFO L225 Difference]: With dead ends: 7721 [2023-11-23 20:36:53,185 INFO L226 Difference]: Without dead ends: 4657 [2023-11-23 20:36:53,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:36:53,207 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 1104 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 3466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:53,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 1738 Invalid, 3466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3062 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-23 20:36:53,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2023-11-23 20:36:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 3867. [2023-11-23 20:36:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 2858 states have (on average 1.5290412876137158) internal successors, (4370), 2935 states have internal predecessors, (4370), 734 states have call successors, (734), 224 states have call predecessors, (734), 274 states have return successors, (932), 747 states have call predecessors, (932), 722 states have call successors, (932) [2023-11-23 20:36:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 6036 transitions. [2023-11-23 20:36:53,570 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 6036 transitions. Word has length 102 [2023-11-23 20:36:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:53,571 INFO L495 AbstractCegarLoop]: Abstraction has 3867 states and 6036 transitions. [2023-11-23 20:36:53,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-23 20:36:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 6036 transitions. [2023-11-23 20:36:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-23 20:36:53,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:53,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2023-11-23 20:36:53,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:36:53,579 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:53,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1435805090, now seen corresponding path program 1 times [2023-11-23 20:36:53,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:53,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832220275] [2023-11-23 20:36:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 20:36:53,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:53,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832220275] [2023-11-23 20:36:53,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832220275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:53,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791605365] [2023-11-23 20:36:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:53,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:53,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:53,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:53,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:36:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:54,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:36:54,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:36:54,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:54,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791605365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:54,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-23 20:36:54,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516023548] [2023-11-23 20:36:54,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:54,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:54,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:54,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:54,228 INFO L87 Difference]: Start difference. First operand 3867 states and 6036 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:36:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:54,622 INFO L93 Difference]: Finished difference Result 7779 states and 12324 transitions. [2023-11-23 20:36:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 105 [2023-11-23 20:36:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:54,655 INFO L225 Difference]: With dead ends: 7779 [2023-11-23 20:36:54,655 INFO L226 Difference]: Without dead ends: 3927 [2023-11-23 20:36:54,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:36:54,679 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 85 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:54,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1719 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2023-11-23 20:36:54,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 3927. [2023-11-23 20:36:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 2908 states have (on average 1.5233837689133425) internal successors, (4430), 2985 states have internal predecessors, (4430), 734 states have call successors, (734), 234 states have call predecessors, (734), 284 states have return successors, (932), 747 states have call predecessors, (932), 722 states have call successors, (932) [2023-11-23 20:36:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 6096 transitions. [2023-11-23 20:36:54,982 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 6096 transitions. Word has length 105 [2023-11-23 20:36:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:54,983 INFO L495 AbstractCegarLoop]: Abstraction has 3927 states and 6096 transitions. [2023-11-23 20:36:54,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:36:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 6096 transitions. [2023-11-23 20:36:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-23 20:36:54,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:54,989 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1] [2023-11-23 20:36:55,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:55,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:55,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:55,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:55,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1833640012, now seen corresponding path program 1 times [2023-11-23 20:36:55,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:55,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21699802] [2023-11-23 20:36:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:55,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:36:55,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:55,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21699802] [2023-11-23 20:36:55,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21699802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:55,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192942691] [2023-11-23 20:36:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:55,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:55,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:55,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:36:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:55,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:36:55,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:36:55,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192942691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:55,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:55,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-23 20:36:55,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878370080] [2023-11-23 20:36:55,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:55,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:36:55,887 INFO L87 Difference]: Start difference. First operand 3927 states and 6096 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:36:56,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:56,257 INFO L93 Difference]: Finished difference Result 7869 states and 12344 transitions. [2023-11-23 20:36:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:56,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 108 [2023-11-23 20:36:56,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:56,289 INFO L225 Difference]: With dead ends: 7869 [2023-11-23 20:36:56,290 INFO L226 Difference]: Without dead ends: 3917 [2023-11-23 20:36:56,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:36:56,310 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 91 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:56,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1715 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2023-11-23 20:36:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3917. [2023-11-23 20:36:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 2898 states have (on average 1.5148378191856453) internal successors, (4390), 2975 states have internal predecessors, (4390), 734 states have call successors, (734), 234 states have call predecessors, (734), 284 states have return successors, (932), 747 states have call predecessors, (932), 722 states have call successors, (932) [2023-11-23 20:36:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 6056 transitions. [2023-11-23 20:36:56,640 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 6056 transitions. Word has length 108 [2023-11-23 20:36:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:56,641 INFO L495 AbstractCegarLoop]: Abstraction has 3917 states and 6056 transitions. [2023-11-23 20:36:56,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:36:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 6056 transitions. [2023-11-23 20:36:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-23 20:36:56,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:56,647 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-11-23 20:36:56,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:56,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:56,864 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:56,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash -247667154, now seen corresponding path program 1 times [2023-11-23 20:36:56,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:56,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751562581] [2023-11-23 20:36:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:56,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:36:57,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751562581] [2023-11-23 20:36:57,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751562581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:57,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543802310] [2023-11-23 20:36:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:57,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:57,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:57,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:57,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:36:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:57,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:36:57,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:36:57,573 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:57,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543802310] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:57,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:36:57,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 20:36:57,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675166695] [2023-11-23 20:36:57,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:57,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:36:57,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:57,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:36:57,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:36:57,580 INFO L87 Difference]: Start difference. First operand 3917 states and 6056 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 20:36:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:59,037 INFO L93 Difference]: Finished difference Result 10350 states and 16701 transitions. [2023-11-23 20:36:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:36:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 109 [2023-11-23 20:36:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:59,082 INFO L225 Difference]: With dead ends: 10350 [2023-11-23 20:36:59,083 INFO L226 Difference]: Without dead ends: 6448 [2023-11-23 20:36:59,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:36:59,110 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 622 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:59,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 1933 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:36:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2023-11-23 20:36:59,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 6330. [2023-11-23 20:36:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6330 states, 4697 states have (on average 1.4826484990419417) internal successors, (6964), 4807 states have internal predecessors, (6964), 1179 states have call successors, (1179), 380 states have call predecessors, (1179), 453 states have return successors, (1772), 1208 states have call predecessors, (1772), 1159 states have call successors, (1772) [2023-11-23 20:36:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6330 states to 6330 states and 9915 transitions. [2023-11-23 20:36:59,604 INFO L78 Accepts]: Start accepts. Automaton has 6330 states and 9915 transitions. Word has length 109 [2023-11-23 20:36:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:59,605 INFO L495 AbstractCegarLoop]: Abstraction has 6330 states and 9915 transitions. [2023-11-23 20:36:59,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 20:36:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6330 states and 9915 transitions. [2023-11-23 20:36:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-23 20:36:59,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:59,611 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-11-23 20:36:59,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:59,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:59,836 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:59,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:59,836 INFO L85 PathProgramCache]: Analyzing trace with hash -504351667, now seen corresponding path program 1 times [2023-11-23 20:36:59,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:59,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534639327] [2023-11-23 20:36:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:59,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:59,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:37:00,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:00,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534639327] [2023-11-23 20:37:00,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534639327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:00,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519599322] [2023-11-23 20:37:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:00,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:00,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:00,212 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:00,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:37:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:00,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:37:00,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:37:00,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:00,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519599322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:00,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:00,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-23 20:37:00,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772984510] [2023-11-23 20:37:00,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:00,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:37:00,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:00,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:37:00,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:37:00,740 INFO L87 Difference]: Start difference. First operand 6330 states and 9915 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 20:37:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:02,203 INFO L93 Difference]: Finished difference Result 14273 states and 22728 transitions. [2023-11-23 20:37:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:37:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 110 [2023-11-23 20:37:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:02,257 INFO L225 Difference]: With dead ends: 14273 [2023-11-23 20:37:02,257 INFO L226 Difference]: Without dead ends: 7958 [2023-11-23 20:37:02,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:37:02,284 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 688 mSDsluCounter, 2703 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 3532 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:02,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 3532 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:37:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2023-11-23 20:37:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7898. [2023-11-23 20:37:02,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7898 states, 5875 states have (on average 1.4665531914893617) internal successors, (8616), 6021 states have internal predecessors, (8616), 1384 states have call successors, (1384), 544 states have call predecessors, (1384), 638 states have return successors, (2692), 1398 states have call predecessors, (2692), 1348 states have call successors, (2692) [2023-11-23 20:37:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7898 states to 7898 states and 12692 transitions. [2023-11-23 20:37:03,044 INFO L78 Accepts]: Start accepts. Automaton has 7898 states and 12692 transitions. Word has length 110 [2023-11-23 20:37:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:03,045 INFO L495 AbstractCegarLoop]: Abstraction has 7898 states and 12692 transitions. [2023-11-23 20:37:03,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-23 20:37:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 7898 states and 12692 transitions. [2023-11-23 20:37:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-23 20:37:03,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:03,051 INFO L195 NwaCegarLoop]: trace histogram [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 20:37:03,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:03,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 20:37:03,264 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:03,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1947463740, now seen corresponding path program 1 times [2023-11-23 20:37:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:03,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081331570] [2023-11-23 20:37:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:03,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:37:03,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081331570] [2023-11-23 20:37:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081331570] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427683420] [2023-11-23 20:37:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:03,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:03,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:03,494 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:03,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:37:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:03,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:37:03,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:37:03,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:03,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427683420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:03,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:03,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 20:37:03,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971873442] [2023-11-23 20:37:03,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:03,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:37:03,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:37:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:37:03,890 INFO L87 Difference]: Start difference. First operand 7898 states and 12692 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:37:04,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:04,763 INFO L93 Difference]: Finished difference Result 16041 states and 26330 transitions. [2023-11-23 20:37:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 109 [2023-11-23 20:37:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:04,830 INFO L225 Difference]: With dead ends: 16041 [2023-11-23 20:37:04,831 INFO L226 Difference]: Without dead ends: 8166 [2023-11-23 20:37:04,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:37:04,907 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 1 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:04,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2429 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:37:04,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8166 states. [2023-11-23 20:37:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8166 to 8030. [2023-11-23 20:37:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8030 states, 5989 states have (on average 1.457672399398898) internal successors, (8730), 6105 states have internal predecessors, (8730), 1384 states have call successors, (1384), 544 states have call predecessors, (1384), 656 states have return successors, (2740), 1446 states have call predecessors, (2740), 1348 states have call successors, (2740) [2023-11-23 20:37:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8030 states to 8030 states and 12854 transitions. [2023-11-23 20:37:05,682 INFO L78 Accepts]: Start accepts. Automaton has 8030 states and 12854 transitions. Word has length 109 [2023-11-23 20:37:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:05,682 INFO L495 AbstractCegarLoop]: Abstraction has 8030 states and 12854 transitions. [2023-11-23 20:37:05,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:37:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 8030 states and 12854 transitions. [2023-11-23 20:37:05,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-23 20:37:05,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:05,688 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-11-23 20:37:05,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:05,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 20:37:05,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:05,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:05,904 INFO L85 PathProgramCache]: Analyzing trace with hash 665408330, now seen corresponding path program 1 times [2023-11-23 20:37:05,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:05,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009256498] [2023-11-23 20:37:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:05,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:37:06,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009256498] [2023-11-23 20:37:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009256498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036366180] [2023-11-23 20:37:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:06,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:06,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:06,143 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:06,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:37:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:06,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:37:06,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:37:06,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:06,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036366180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:06,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:06,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-23 20:37:06,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786098240] [2023-11-23 20:37:06,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:06,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:06,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:06,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:06,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:06,639 INFO L87 Difference]: Start difference. First operand 8030 states and 12854 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:37:07,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:07,455 INFO L93 Difference]: Finished difference Result 16466 states and 27101 transitions. [2023-11-23 20:37:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:37:07,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2023-11-23 20:37:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:07,509 INFO L225 Difference]: With dead ends: 16466 [2023-11-23 20:37:07,509 INFO L226 Difference]: Without dead ends: 8460 [2023-11-23 20:37:07,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:37:07,567 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 19 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:07,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1667 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:07,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8460 states. [2023-11-23 20:37:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8460 to 8364. [2023-11-23 20:37:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8364 states, 6323 states have (on average 1.4670251462913173) internal successors, (9276), 6439 states have internal predecessors, (9276), 1384 states have call successors, (1384), 544 states have call predecessors, (1384), 656 states have return successors, (2740), 1446 states have call predecessors, (2740), 1348 states have call successors, (2740) [2023-11-23 20:37:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8364 states to 8364 states and 13400 transitions. [2023-11-23 20:37:08,300 INFO L78 Accepts]: Start accepts. Automaton has 8364 states and 13400 transitions. Word has length 112 [2023-11-23 20:37:08,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:08,301 INFO L495 AbstractCegarLoop]: Abstraction has 8364 states and 13400 transitions. [2023-11-23 20:37:08,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:37:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 8364 states and 13400 transitions. [2023-11-23 20:37:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 20:37:08,308 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:08,308 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-11-23 20:37:08,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_699ee55d-a507-4d6d-b7db-4c1ee0495333/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0