./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.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_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/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_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/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_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/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 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:18:45,711 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:18:45,815 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:18:45,821 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:18:45,822 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:18:45,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:18:45,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:18:45,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:18:45,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:18:45,848 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:18:45,849 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:18:45,850 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:18:45,850 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:18:45,851 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:18:45,851 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:18:45,852 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:18:45,852 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:18:45,853 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:18:45,853 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:18:45,854 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:18:45,854 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:18:45,855 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:18:45,855 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:18:45,856 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:18:45,856 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:18:45,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:18:45,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:18:45,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:18:45,858 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:18:45,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:18:45,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:18:45,859 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:18:45,859 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:18:45,859 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:18:45,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:18:45,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:18:45,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:18:45,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:45,861 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:18:45,861 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:18:45,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:18:45,861 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:18:45,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:18:45,862 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:18:45,862 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:18:45,862 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:18:45,862 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:18:45,863 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_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5477c3156be335e627e6d8ad4c695e912cf982226281f4316d6a1123dc83cedb [2023-11-23 21:18:46,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:18:46,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:18:46,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:18:46,206 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:18:46,207 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:18:46,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2023-11-23 21:18:49,445 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:18:49,912 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:18:49,912 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c [2023-11-23 21:18:49,956 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/data/2c0818fa6/8ef31d8e7635427b943fc4371132d34c/FLAGb45f2d0ab [2023-11-23 21:18:49,976 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/data/2c0818fa6/8ef31d8e7635427b943fc4371132d34c [2023-11-23 21:18:49,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:18:49,987 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:18:49,989 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:49,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:18:49,997 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:18:49,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:49,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8dcfa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:49, skipping insertion in model container [2023-11-23 21:18:49,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:49" (1/1) ... [2023-11-23 21:18:50,090 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:18:50,574 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_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2023-11-23 21:18:50,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:50,733 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:18:50,743 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [48] [2023-11-23 21:18:50,745 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [169] [2023-11-23 21:18:50,746 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification1_spec.i","") [185] [2023-11-23 21:18:50,746 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [370] [2023-11-23 21:18:50,746 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1901] [2023-11-23 21:18:50,746 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1939] [2023-11-23 21:18:50,747 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1948] [2023-11-23 21:18:50,747 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2041] [2023-11-23 21:18:50,747 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2407] [2023-11-23 21:18:50,747 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2757] [2023-11-23 21:18:50,807 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_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/sv-benchmarks/c/product-lines/elevator_spec1_product11.cil.c[40826,40839] [2023-11-23 21:18:50,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:50,879 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:18:50,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50 WrapperNode [2023-11-23 21:18:50,880 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:50,881 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:50,881 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:18:50,881 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:18:50,889 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:50,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:50,997 INFO L138 Inliner]: procedures = 93, calls = 339, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1117 [2023-11-23 21:18:51,008 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:51,009 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:18:51,010 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:18:51,010 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:18:51,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:51,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:51,028 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:51,036 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:51,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:51,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:51,112 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:51,124 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:51,137 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:18:51,139 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:18:51,140 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:18:51,140 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:18:51,141 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (1/1) ... [2023-11-23 21:18:51,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:51,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:18:51,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:18:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-23 21:18:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-23 21:18:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:18:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-23 21:18:51,223 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-23 21:18:51,223 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-23 21:18:51,224 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-23 21:18:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-23 21:18:51,224 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-23 21:18:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-23 21:18:51,224 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-23 21:18:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-23 21:18:51,225 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-23 21:18:51,225 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-23 21:18:51,226 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-23 21:18:51,226 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-23 21:18:51,226 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-23 21:18:51,226 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-23 21:18:51,226 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-23 21:18:51,227 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-23 21:18:51,227 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-23 21:18:51,227 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-23 21:18:51,227 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-23 21:18:51,228 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-23 21:18:51,228 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-23 21:18:51,228 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-23 21:18:51,228 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-23 21:18:51,229 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-23 21:18:51,229 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-23 21:18:51,229 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-23 21:18:51,229 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-23 21:18:51,229 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-23 21:18:51,230 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-23 21:18:51,230 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-23 21:18:51,230 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-23 21:18:51,230 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-23 21:18:51,230 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-23 21:18:51,230 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-23 21:18:51,231 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-23 21:18:51,231 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-23 21:18:51,231 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-23 21:18:51,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:18:51,231 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-23 21:18:51,231 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-23 21:18:51,232 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-23 21:18:51,232 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-23 21:18:51,232 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-23 21:18:51,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-23 21:18:51,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:18:51,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:18:51,233 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-23 21:18:51,233 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-23 21:18:51,442 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:18:51,448 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:18:52,894 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:18:53,944 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:18:53,945 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:18:53,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:53 BoogieIcfgContainer [2023-11-23 21:18:53,947 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:18:53,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:18:53,951 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:18:53,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:18:53,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:18:49" (1/3) ... [2023-11-23 21:18:53,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a01c7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:53, skipping insertion in model container [2023-11-23 21:18:53,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:50" (2/3) ... [2023-11-23 21:18:53,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a01c7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:53, skipping insertion in model container [2023-11-23 21:18:53,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:53" (3/3) ... [2023-11-23 21:18:53,958 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product11.cil.c [2023-11-23 21:18:53,978 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:18:53,978 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:18:54,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:18:54,067 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;@225099d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:18:54,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:18:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 375 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2023-11-23 21:18:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 21:18:54,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:54,115 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:54,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:54,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:54,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1129105543, now seen corresponding path program 1 times [2023-11-23 21:18:54,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:54,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388318470] [2023-11-23 21:18:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:54,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:18:54,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:54,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388318470] [2023-11-23 21:18:54,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388318470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:54,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:54,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:18:54,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982162315] [2023-11-23 21:18:54,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:54,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:18:54,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:54,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:18:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:18:54,856 INFO L87 Difference]: Start difference. First operand has 375 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 273 states have internal predecessors, (402), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-23 21:18:55,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:55,006 INFO L93 Difference]: Finished difference Result 393 states and 623 transitions. [2023-11-23 21:18:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:18:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 88 [2023-11-23 21:18:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:55,028 INFO L225 Difference]: With dead ends: 393 [2023-11-23 21:18:55,029 INFO L226 Difference]: Without dead ends: 371 [2023-11-23 21:18:55,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:18:55,039 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:55,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 556 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:18:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-23 21:18:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2023-11-23 21:18:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 250 states have (on average 1.584) internal successors, (396), 269 states have internal predecessors, (396), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-23 21:18:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 585 transitions. [2023-11-23 21:18:55,135 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 585 transitions. Word has length 88 [2023-11-23 21:18:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:55,137 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 585 transitions. [2023-11-23 21:18:55,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-23 21:18:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 585 transitions. [2023-11-23 21:18:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-23 21:18:55,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:55,144 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:18:55,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:55,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1956871652, now seen corresponding path program 1 times [2023-11-23 21:18:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:55,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560929907] [2023-11-23 21:18:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:18:55,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:55,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560929907] [2023-11-23 21:18:55,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560929907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:55,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:55,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:18:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368674752] [2023-11-23 21:18:55,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:55,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:18:55,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:55,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:18:55,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:18:55,944 INFO L87 Difference]: Start difference. First operand 371 states and 585 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-23 21:18:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:58,366 INFO L93 Difference]: Finished difference Result 1130 states and 1816 transitions. [2023-11-23 21:18:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:18:58,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2023-11-23 21:18:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:58,390 INFO L225 Difference]: With dead ends: 1130 [2023-11-23 21:18:58,390 INFO L226 Difference]: Without dead ends: 782 [2023-11-23 21:18:58,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:18:58,404 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1142 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:58,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 1605 Invalid, 2605 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [425 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 21:18:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2023-11-23 21:18:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 733. [2023-11-23 21:18:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 504 states have (on average 1.5992063492063493) internal successors, (806), 537 states have internal predecessors, (806), 185 states have call successors, (185), 43 states have call predecessors, (185), 43 states have return successors, (186), 177 states have call predecessors, (186), 180 states have call successors, (186) [2023-11-23 21:18:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1177 transitions. [2023-11-23 21:18:58,486 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1177 transitions. Word has length 89 [2023-11-23 21:18:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:58,487 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 1177 transitions. [2023-11-23 21:18:58,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-23 21:18:58,488 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1177 transitions. [2023-11-23 21:18:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-23 21:18:58,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:58,492 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:58,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:18:58,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:58,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:58,493 INFO L85 PathProgramCache]: Analyzing trace with hash -822961890, now seen corresponding path program 1 times [2023-11-23 21:18:58,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:58,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35821437] [2023-11-23 21:18:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:58,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:18:58,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:58,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35821437] [2023-11-23 21:18:58,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35821437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:58,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:58,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:18:58,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549579770] [2023-11-23 21:18:58,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:58,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:18:58,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:58,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:18:58,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:18:58,963 INFO L87 Difference]: Start difference. First operand 733 states and 1177 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 21:18:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:59,724 INFO L93 Difference]: Finished difference Result 804 states and 1289 transitions. [2023-11-23 21:18:59,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:18:59,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 93 [2023-11-23 21:18:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:59,733 INFO L225 Difference]: With dead ends: 804 [2023-11-23 21:18:59,733 INFO L226 Difference]: Without dead ends: 789 [2023-11-23 21:18:59,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:59,736 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 678 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:59,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1817 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:18:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2023-11-23 21:18:59,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 737. [2023-11-23 21:18:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 508 states have (on average 1.594488188976378) internal successors, (810), 541 states have internal predecessors, (810), 185 states have call successors, (185), 43 states have call predecessors, (185), 43 states have return successors, (186), 177 states have call predecessors, (186), 180 states have call successors, (186) [2023-11-23 21:18:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1181 transitions. [2023-11-23 21:18:59,812 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1181 transitions. Word has length 93 [2023-11-23 21:18:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:59,814 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1181 transitions. [2023-11-23 21:18:59,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 21:18:59,815 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1181 transitions. [2023-11-23 21:18:59,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-23 21:18:59,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:59,820 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:59,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:18:59,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:59,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash -774114563, now seen corresponding path program 1 times [2023-11-23 21:18:59,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:59,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894852323] [2023-11-23 21:18:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:59,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:19:00,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:00,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894852323] [2023-11-23 21:19:00,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894852323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:00,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:00,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:19:00,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654148015] [2023-11-23 21:19:00,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:00,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:19:00,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:00,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:19:00,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:00,177 INFO L87 Difference]: Start difference. First operand 737 states and 1181 transitions. Second operand has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-23 21:19:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:00,370 INFO L93 Difference]: Finished difference Result 756 states and 1205 transitions. [2023-11-23 21:19:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:19:00,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) Word has length 98 [2023-11-23 21:19:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:00,379 INFO L225 Difference]: With dead ends: 756 [2023-11-23 21:19:00,379 INFO L226 Difference]: Without dead ends: 741 [2023-11-23 21:19:00,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:19:00,381 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 30 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:00,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2184 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:19:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2023-11-23 21:19:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 737. [2023-11-23 21:19:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 508 states have (on average 1.5905511811023623) internal successors, (808), 541 states have internal predecessors, (808), 185 states have call successors, (185), 43 states have call predecessors, (185), 43 states have return successors, (186), 177 states have call predecessors, (186), 180 states have call successors, (186) [2023-11-23 21:19:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1179 transitions. [2023-11-23 21:19:00,447 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1179 transitions. Word has length 98 [2023-11-23 21:19:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:00,448 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 1179 transitions. [2023-11-23 21:19:00,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-23 21:19:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1179 transitions. [2023-11-23 21:19:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-23 21:19:00,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:00,452 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:00,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:19:00,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:00,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1643566318, now seen corresponding path program 1 times [2023-11-23 21:19:00,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:00,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873597644] [2023-11-23 21:19:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:00,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:19:04,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:04,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873597644] [2023-11-23 21:19:04,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873597644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:04,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117853434] [2023-11-23 21:19:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:04,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:04,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:05,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:05,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:19:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:05,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-23 21:19:05,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:19:06,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:06,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117853434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:06,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:06,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [23] total 31 [2023-11-23 21:19:06,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270661480] [2023-11-23 21:19:06,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:06,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 21:19:06,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:06,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 21:19:06,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:19:06,391 INFO L87 Difference]: Start difference. First operand 737 states and 1179 transitions. Second operand has 10 states, 6 states have (on average 9.333333333333334) internal successors, (56), 8 states have internal predecessors, (56), 6 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-23 21:19:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:09,136 INFO L93 Difference]: Finished difference Result 1441 states and 2321 transitions. [2023-11-23 21:19:09,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:19:09,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 9.333333333333334) internal successors, (56), 8 states have internal predecessors, (56), 6 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 105 [2023-11-23 21:19:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:09,144 INFO L225 Difference]: With dead ends: 1441 [2023-11-23 21:19:09,144 INFO L226 Difference]: Without dead ends: 727 [2023-11-23 21:19:09,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 21:19:09,149 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 739 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 2862 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:09,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 1158 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2862 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 21:19:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2023-11-23 21:19:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 727. [2023-11-23 21:19:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 502 states have (on average 1.5836653386454183) internal successors, (795), 534 states have internal predecessors, (795), 181 states have call successors, (181), 43 states have call predecessors, (181), 43 states have return successors, (183), 174 states have call predecessors, (183), 177 states have call successors, (183) [2023-11-23 21:19:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1159 transitions. [2023-11-23 21:19:09,212 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1159 transitions. Word has length 105 [2023-11-23 21:19:09,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:09,212 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 1159 transitions. [2023-11-23 21:19:09,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 9.333333333333334) internal successors, (56), 8 states have internal predecessors, (56), 6 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-23 21:19:09,213 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1159 transitions. [2023-11-23 21:19:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-23 21:19:09,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:09,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:09,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:09,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:09,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:09,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash 588911415, now seen corresponding path program 1 times [2023-11-23 21:19:09,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:09,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42741498] [2023-11-23 21:19:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:09,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:19:11,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:11,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42741498] [2023-11-23 21:19:11,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42741498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:11,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:11,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-23 21:19:11,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748888505] [2023-11-23 21:19:11,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:11,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:19:11,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:19:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:19:11,032 INFO L87 Difference]: Start difference. First operand 727 states and 1159 transitions. Second operand has 16 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 6 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 9 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-23 21:19:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:20,176 INFO L93 Difference]: Finished difference Result 3069 states and 4955 transitions. [2023-11-23 21:19:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-23 21:19:20,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 6 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 9 states have call predecessors, (19), 5 states have call successors, (19) Word has length 106 [2023-11-23 21:19:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:20,191 INFO L225 Difference]: With dead ends: 3069 [2023-11-23 21:19:20,191 INFO L226 Difference]: Without dead ends: 1562 [2023-11-23 21:19:20,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1552, Unknown=0, NotChecked=0, Total=1980 [2023-11-23 21:19:20,201 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 3352 mSDsluCounter, 3565 mSDsCounter, 0 mSdLazyCounter, 11198 mSolverCounterSat, 1735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3352 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 12933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1735 IncrementalHoareTripleChecker+Valid, 11198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:20,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3352 Valid, 4170 Invalid, 12933 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1735 Valid, 11198 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-11-23 21:19:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2023-11-23 21:19:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1474. [2023-11-23 21:19:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1025 states have (on average 1.5863414634146342) internal successors, (1626), 1086 states have internal predecessors, (1626), 366 states have call successors, (366), 81 states have call predecessors, (366), 82 states have return successors, (381), 356 states have call predecessors, (381), 362 states have call successors, (381) [2023-11-23 21:19:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2373 transitions. [2023-11-23 21:19:20,371 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2373 transitions. Word has length 106 [2023-11-23 21:19:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:20,371 INFO L495 AbstractCegarLoop]: Abstraction has 1474 states and 2373 transitions. [2023-11-23 21:19:20,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 6 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 9 states have call predecessors, (19), 5 states have call successors, (19) [2023-11-23 21:19:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2373 transitions. [2023-11-23 21:19:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-23 21:19:20,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:20,376 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:20,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:19:20,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:20,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:20,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1506243252, now seen corresponding path program 1 times [2023-11-23 21:19:20,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:20,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007685822] [2023-11-23 21:19:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:19:20,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007685822] [2023-11-23 21:19:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007685822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:20,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:20,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:19:20,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215169642] [2023-11-23 21:19:20,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:20,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:19:20,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:19:20,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:20,638 INFO L87 Difference]: Start difference. First operand 1474 states and 2373 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-23 21:19:22,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:22,890 INFO L93 Difference]: Finished difference Result 5317 states and 8746 transitions. [2023-11-23 21:19:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:19:22,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) Word has length 107 [2023-11-23 21:19:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:22,936 INFO L225 Difference]: With dead ends: 5317 [2023-11-23 21:19:22,937 INFO L226 Difference]: Without dead ends: 3874 [2023-11-23 21:19:22,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:19:22,951 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 1321 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:22,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1380 Valid, 878 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 21:19:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3874 states. [2023-11-23 21:19:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3874 to 3352. [2023-11-23 21:19:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 2411 states have (on average 1.604313562836997) internal successors, (3868), 2538 states have internal predecessors, (3868), 756 states have call successors, (756), 179 states have call predecessors, (756), 184 states have return successors, (835), 708 states have call predecessors, (835), 752 states have call successors, (835) [2023-11-23 21:19:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 5459 transitions. [2023-11-23 21:19:23,399 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 5459 transitions. Word has length 107 [2023-11-23 21:19:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:23,400 INFO L495 AbstractCegarLoop]: Abstraction has 3352 states and 5459 transitions. [2023-11-23 21:19:23,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 4 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 3 states have call successors, (19) [2023-11-23 21:19:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 5459 transitions. [2023-11-23 21:19:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-23 21:19:23,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:23,407 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:23,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:19:23,408 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:23,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1208639854, now seen corresponding path program 1 times [2023-11-23 21:19:23,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:23,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34427591] [2023-11-23 21:19:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:19:29,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:29,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34427591] [2023-11-23 21:19:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34427591] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099975500] [2023-11-23 21:19:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:29,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:29,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:29,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66adb073-ddb2-470b-b2aa-79bdd4c2cc8a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:19:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:30,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:19:30,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 21:19:30,307 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:30,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099975500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:30,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:30,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [38] total 40 [2023-11-23 21:19:30,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773204756] [2023-11-23 21:19:30,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:30,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:19:30,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:19:30,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2023-11-23 21:19:30,312 INFO L87 Difference]: Start difference. First operand 3352 states and 5459 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 1 states have call successors, (20)