./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 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:30:06,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:30:06,582 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 23:30:06,591 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:30:06,592 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:30:06,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:30:06,619 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:30:06,619 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:30:06,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:30:06,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:30:06,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:30:06,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:30:06,620 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:30:06,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:30:06,620 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:30:06,621 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:30:06,621 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:30:06,621 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:30:06,621 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:30:06,621 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:30:06,621 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:30:06,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:30:06,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:30:06,621 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:30:06,622 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:30:06,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:30:06,622 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:30:06,622 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:30:06,622 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:30:06,622 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:30:06,622 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:30:06,622 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:30:06,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:30:06,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:30:06,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:30:06,623 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:30:06,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:30:06,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:30:06,623 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:30:06,623 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:30:06,623 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:30:06,623 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:30:06,623 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:30:06,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:30:06,624 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:30:06,624 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:30:06,624 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:30:06,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:30:06,624 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC 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 -> Automizer 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 [2024-11-23 23:30:06,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:30:06,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:30:06,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:30:06,944 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:30:06,944 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:30:06,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2024-11-23 23:30:09,879 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/data/2b71b18d1/bd2e985768c94fecaca894270600a7a6/FLAG97babb519 [2024-11-23 23:30:10,301 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:30:10,301 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2024-11-23 23:30:10,332 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/data/2b71b18d1/bd2e985768c94fecaca894270600a7a6/FLAG97babb519 [2024-11-23 23:30:10,446 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/data/2b71b18d1/bd2e985768c94fecaca894270600a7a6 [2024-11-23 23:30:10,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:30:10,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:30:10,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:30:10,454 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:30:10,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:30:10,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:30:10" (1/1) ... [2024-11-23 23:30:10,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23bc6c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:10, skipping insertion in model container [2024-11-23 23:30:10,462 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:30:10" (1/1) ... [2024-11-23 23:30:10,543 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:30:10,717 WARN L250 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_65284330-3eaa-4705-bab6-cb33ac9ddbb3/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2024-11-23 23:30:11,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:30:11,042 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:30:11,050 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [48] [2024-11-23 23:30:11,051 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [68] [2024-11-23 23:30:11,052 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [77] [2024-11-23 23:30:11,052 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [443] [2024-11-23 23:30:11,052 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2020] [2024-11-23 23:30:11,052 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2682] [2024-11-23 23:30:11,052 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2775] [2024-11-23 23:30:11,053 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2893] [2024-11-23 23:30:11,053 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2931] [2024-11-23 23:30:11,053 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [3279] [2024-11-23 23:30:11,062 WARN L250 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_65284330-3eaa-4705-bab6-cb33ac9ddbb3/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2024-11-23 23:30:11,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:30:11,272 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:30:11,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11 WrapperNode [2024-11-23 23:30:11,273 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:30:11,274 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:30:11,274 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:30:11,274 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:30:11,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,306 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,361 INFO L138 Inliner]: procedures = 92, calls = 344, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 837 [2024-11-23 23:30:11,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:30:11,362 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:30:11,362 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:30:11,363 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:30:11,373 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,379 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,413 INFO L175 MemorySlicer]: Split 81 memory accesses to 20 slices as follows [2, 4, 4, 4, 2, 4, 4, 5, 3, 3, 5, 7, 4, 4, 4, 4, 4, 6, 4, 4]. 9 percent of accesses are in the largest equivalence class. The 81 initializations are split as follows [2, 4, 4, 4, 2, 4, 4, 5, 3, 3, 5, 7, 4, 4, 4, 4, 4, 6, 4, 4]. The 0 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]. [2024-11-23 23:30:11,413 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,413 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,451 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,455 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,468 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,478 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,485 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,499 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:30:11,503 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:30:11,505 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:30:11,506 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:30:11,507 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (1/1) ... [2024-11-23 23:30:11,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:30:11,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:11,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:30:11,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:30:11,594 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2024-11-23 23:30:11,595 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2024-11-23 23:30:11,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:30:11,595 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-23 23:30:11,596 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-23 23:30:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-23 23:30:11,596 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-23 23:30:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2024-11-23 23:30:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2024-11-23 23:30:11,597 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-23 23:30:11,597 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-23 23:30:11,597 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-23 23:30:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-23 23:30:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-23 23:30:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-23 23:30:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-23 23:30:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-23 23:30:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-23 23:30:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-23 23:30:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-23 23:30:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-23 23:30:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-23 23:30:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-23 23:30:11,600 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-23 23:30:11,600 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-23 23:30:11,600 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-23 23:30:11,600 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-23 23:30:11,600 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-23 23:30:11,600 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-23 23:30:11,600 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-23 23:30:11,600 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:30:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#15 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#16 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#17 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#18 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#19 [2024-11-23 23:30:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-23 23:30:11,602 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-23 23:30:11,602 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-23 23:30:11,602 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-23 23:30:11,602 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-23 23:30:11,602 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-23 23:30:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-23 23:30:11,606 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-23 23:30:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2024-11-23 23:30:11,606 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2024-11-23 23:30:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2024-11-23 23:30:11,606 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2024-11-23 23:30:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:30:11,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:30:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-23 23:30:11,607 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-23 23:30:11,813 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:30:11,815 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:30:13,297 INFO L? ?]: Removed 464 outVars from TransFormulas that were not future-live. [2024-11-23 23:30:13,298 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:30:13,335 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:30:13,336 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-23 23:30:13,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:30:13 BoogieIcfgContainer [2024-11-23 23:30:13,336 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:30:13,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:30:13,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:30:13,345 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:30:13,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:30:10" (1/3) ... [2024-11-23 23:30:13,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ae099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:30:13, skipping insertion in model container [2024-11-23 23:30:13,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:30:11" (2/3) ... [2024-11-23 23:30:13,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ae099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:30:13, skipping insertion in model container [2024-11-23 23:30:13,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:30:13" (3/3) ... [2024-11-23 23:30:13,348 INFO L128 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2024-11-23 23:30:13,360 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:30:13,362 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG elevator_spec13_product22.cil.c that has 27 procedures, 596 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-23 23:30:13,454 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:30:13,467 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, 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;@4e2c3555, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:30:13,468 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-23 23:30:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 596 states, 466 states have (on average 1.6952789699570816) internal successors, (790), 486 states have internal predecessors, (790), 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) [2024-11-23 23:30:13,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-23 23:30:13,503 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:13,504 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:13,505 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:13,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:13,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1305719938, now seen corresponding path program 1 times [2024-11-23 23:30:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:13,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346537512] [2024-11-23 23:30:13,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:13,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:30:14,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:14,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346537512] [2024-11-23 23:30:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346537512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919035371] [2024-11-23 23:30:14,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:14,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:14,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:14,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:14,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:30:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:14,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-23 23:30:14,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:14,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 23:30:14,778 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:14,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919035371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:14,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:14,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 6 [2024-11-23 23:30:14,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080414276] [2024-11-23 23:30:14,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:14,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 23:30:14,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:14,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 23:30:14,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:14,814 INFO L87 Difference]: Start difference. First operand has 596 states, 466 states have (on average 1.6952789699570816) internal successors, (790), 486 states have internal predecessors, (790), 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 25.5) internal successors, (51), 2 states have internal predecessors, (51), 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) [2024-11-23 23:30:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:14,957 INFO L93 Difference]: Finished difference Result 1170 states and 1971 transitions. [2024-11-23 23:30:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 23:30:14,959 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 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 83 [2024-11-23 23:30:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:14,980 INFO L225 Difference]: With dead ends: 1170 [2024-11-23 23:30:14,980 INFO L226 Difference]: Without dead ends: 586 [2024-11-23 23:30:14,989 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:14,992 INFO L435 NwaCegarLoop]: 982 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:14,993 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:30:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2024-11-23 23:30:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 586. [2024-11-23 23:30:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 459 states have (on average 1.6775599128540306) internal successors, (770), 477 states have internal predecessors, (770), 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) [2024-11-23 23:30:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 971 transitions. [2024-11-23 23:30:15,117 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 971 transitions. Word has length 83 [2024-11-23 23:30:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:15,122 INFO L471 AbstractCegarLoop]: Abstraction has 586 states and 971 transitions. [2024-11-23 23:30:15,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 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) [2024-11-23 23:30:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 971 transitions. [2024-11-23 23:30:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-23 23:30:15,131 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:15,131 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:15,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:15,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-23 23:30:15,332 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:15,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2139893227, now seen corresponding path program 1 times [2024-11-23 23:30:15,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:15,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327268578] [2024-11-23 23:30:15,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:15,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:30:15,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:15,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327268578] [2024-11-23 23:30:15,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327268578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:15,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33348701] [2024-11-23 23:30:15,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:15,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:15,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:15,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:30:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:16,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:30:16,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-23 23:30:16,353 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:16,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33348701] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:16,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:16,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-23 23:30:16,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585285971] [2024-11-23 23:30:16,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:16,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:30:16,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:16,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:30:16,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:30:16,356 INFO L87 Difference]: Start difference. First operand 586 states and 971 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-23 23:30:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:16,516 INFO L93 Difference]: Finished difference Result 1173 states and 1950 transitions. [2024-11-23 23:30:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:30:16,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2024-11-23 23:30:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:16,523 INFO L225 Difference]: With dead ends: 1173 [2024-11-23 23:30:16,523 INFO L226 Difference]: Without dead ends: 595 [2024-11-23 23:30:16,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:30:16,527 INFO L435 NwaCegarLoop]: 958 mSDtfsCounter, 17 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2866 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:16,528 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2866 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2024-11-23 23:30:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2024-11-23 23:30:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 467 states have (on average 1.6788008565310493) internal successors, (784), 485 states have internal predecessors, (784), 102 states have call successors, (102), 27 states have call predecessors, (102), 25 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2024-11-23 23:30:16,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 985 transitions. [2024-11-23 23:30:16,603 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 985 transitions. Word has length 99 [2024-11-23 23:30:16,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:16,603 INFO L471 AbstractCegarLoop]: Abstraction has 595 states and 985 transitions. [2024-11-23 23:30:16,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-23 23:30:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 985 transitions. [2024-11-23 23:30:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-23 23:30:16,609 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:16,610 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:16,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 23:30:16,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:16,810 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:16,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:16,811 INFO L85 PathProgramCache]: Analyzing trace with hash 202058560, now seen corresponding path program 1 times [2024-11-23 23:30:16,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:16,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574532545] [2024-11-23 23:30:16,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:16,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-23 23:30:17,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:17,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574532545] [2024-11-23 23:30:17,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574532545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:17,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163396063] [2024-11-23 23:30:17,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:17,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:17,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:17,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:17,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:30:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:17,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:30:17,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:30:17,546 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:17,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163396063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:17,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:17,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-23 23:30:17,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690101008] [2024-11-23 23:30:17,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:17,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:30:17,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:17,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:30:17,548 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:30:17,548 INFO L87 Difference]: Start difference. First operand 595 states and 985 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-23 23:30:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:17,902 INFO L93 Difference]: Finished difference Result 1243 states and 2074 transitions. [2024-11-23 23:30:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:30:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 85 [2024-11-23 23:30:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:17,911 INFO L225 Difference]: With dead ends: 1243 [2024-11-23 23:30:17,911 INFO L226 Difference]: Without dead ends: 658 [2024-11-23 23:30:17,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:30:17,917 INFO L435 NwaCegarLoop]: 946 mSDtfsCounter, 122 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 2761 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:17,917 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 2761 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:30:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2024-11-23 23:30:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 640. [2024-11-23 23:30:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 511 states have (on average 1.6986301369863013) internal successors, (868), 529 states have internal predecessors, (868), 102 states have call successors, (102), 28 states have call predecessors, (102), 26 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2024-11-23 23:30:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1069 transitions. [2024-11-23 23:30:17,961 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1069 transitions. Word has length 85 [2024-11-23 23:30:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:17,962 INFO L471 AbstractCegarLoop]: Abstraction has 640 states and 1069 transitions. [2024-11-23 23:30:17,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-23 23:30:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1069 transitions. [2024-11-23 23:30:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-23 23:30:17,966 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:17,966 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:17,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:18,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:18,173 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:18,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash 595940684, now seen corresponding path program 1 times [2024-11-23 23:30:18,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:18,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862860813] [2024-11-23 23:30:18,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:18,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-23 23:30:18,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:18,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862860813] [2024-11-23 23:30:18,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862860813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:18,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555164898] [2024-11-23 23:30:18,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:18,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:18,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:18,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:18,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:30:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:18,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:30:18,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:30:18,897 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:18,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555164898] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:18,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:18,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-23 23:30:18,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419579825] [2024-11-23 23:30:18,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:18,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:30:18,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:18,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:30:18,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:30:18,899 INFO L87 Difference]: Start difference. First operand 640 states and 1069 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:30:19,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:19,075 INFO L93 Difference]: Finished difference Result 1295 states and 2165 transitions. [2024-11-23 23:30:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:30:19,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 87 [2024-11-23 23:30:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:19,083 INFO L225 Difference]: With dead ends: 1295 [2024-11-23 23:30:19,083 INFO L226 Difference]: Without dead ends: 665 [2024-11-23 23:30:19,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:30:19,088 INFO L435 NwaCegarLoop]: 958 mSDtfsCounter, 89 mSDsluCounter, 4698 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5656 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:19,089 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 5656 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2024-11-23 23:30:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 653. [2024-11-23 23:30:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 521 states have (on average 1.6948176583493282) internal successors, (883), 541 states have internal predecessors, (883), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (104), 97 states have call predecessors, (104), 100 states have call successors, (104) [2024-11-23 23:30:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1090 transitions. [2024-11-23 23:30:19,146 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1090 transitions. Word has length 87 [2024-11-23 23:30:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:19,147 INFO L471 AbstractCegarLoop]: Abstraction has 653 states and 1090 transitions. [2024-11-23 23:30:19,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:30:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1090 transitions. [2024-11-23 23:30:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-23 23:30:19,151 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:19,151 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:19,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:30:19,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:19,355 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:19,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:19,356 INFO L85 PathProgramCache]: Analyzing trace with hash -870342570, now seen corresponding path program 1 times [2024-11-23 23:30:19,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:19,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455220941] [2024-11-23 23:30:19,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:19,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:30:19,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:19,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455220941] [2024-11-23 23:30:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455220941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700370346] [2024-11-23 23:30:19,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:19,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:19,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:19,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:19,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:30:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:20,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:30:20,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:30:20,153 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:20,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700370346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:20,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:20,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-23 23:30:20,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962990470] [2024-11-23 23:30:20,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:20,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:30:20,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:20,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:30:20,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:30:20,155 INFO L87 Difference]: Start difference. First operand 653 states and 1090 transitions. Second operand has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:20,311 INFO L93 Difference]: Finished difference Result 1315 states and 2196 transitions. [2024-11-23 23:30:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:30:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 104 [2024-11-23 23:30:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:20,318 INFO L225 Difference]: With dead ends: 1315 [2024-11-23 23:30:20,318 INFO L226 Difference]: Without dead ends: 674 [2024-11-23 23:30:20,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:30:20,322 INFO L435 NwaCegarLoop]: 958 mSDtfsCounter, 100 mSDsluCounter, 4686 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 5644 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:20,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 5644 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:20,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2024-11-23 23:30:20,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 653. [2024-11-23 23:30:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 521 states have (on average 1.6948176583493282) internal successors, (883), 541 states have internal predecessors, (883), 103 states have call successors, (103), 28 states have call predecessors, (103), 28 states have return successors, (104), 97 states have call predecessors, (104), 100 states have call successors, (104) [2024-11-23 23:30:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1090 transitions. [2024-11-23 23:30:20,362 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1090 transitions. Word has length 104 [2024-11-23 23:30:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:20,363 INFO L471 AbstractCegarLoop]: Abstraction has 653 states and 1090 transitions. [2024-11-23 23:30:20,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1090 transitions. [2024-11-23 23:30:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-23 23:30:20,367 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:20,377 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:20,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 23:30:20,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:20,581 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:20,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash -322872208, now seen corresponding path program 1 times [2024-11-23 23:30:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:20,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945433490] [2024-11-23 23:30:20,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:20,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:30:20,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:20,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945433490] [2024-11-23 23:30:20,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945433490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:20,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239319635] [2024-11-23 23:30:20,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:20,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:20,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:20,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:20,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:30:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:21,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:30:21,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:30:21,133 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:21,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239319635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:21,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:21,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:30:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917381269] [2024-11-23 23:30:21,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:21,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:30:21,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:21,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:30:21,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:21,135 INFO L87 Difference]: Start difference. First operand 653 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-23 23:30:21,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:21,253 INFO L93 Difference]: Finished difference Result 1309 states and 2186 transitions. [2024-11-23 23:30:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:30:21,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2024-11-23 23:30:21,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:21,259 INFO L225 Difference]: With dead ends: 1309 [2024-11-23 23:30:21,260 INFO L226 Difference]: Without dead ends: 664 [2024-11-23 23:30:21,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:30:21,263 INFO L435 NwaCegarLoop]: 959 mSDtfsCounter, 12 mSDsluCounter, 1909 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:21,264 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2868 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2024-11-23 23:30:21,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 662. [2024-11-23 23:30:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 529 states have (on average 1.6862003780718335) internal successors, (892), 549 states have internal predecessors, (892), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2024-11-23 23:30:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1098 transitions. [2024-11-23 23:30:21,314 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1098 transitions. Word has length 104 [2024-11-23 23:30:21,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:21,314 INFO L471 AbstractCegarLoop]: Abstraction has 662 states and 1098 transitions. [2024-11-23 23:30:21,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-23 23:30:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1098 transitions. [2024-11-23 23:30:21,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-23 23:30:21,318 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:21,318 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:21,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:30:21,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-23 23:30:21,519 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:21,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash -313595440, now seen corresponding path program 1 times [2024-11-23 23:30:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335200699] [2024-11-23 23:30:21,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:21,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-23 23:30:21,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:21,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335200699] [2024-11-23 23:30:21,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335200699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:21,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529514587] [2024-11-23 23:30:21,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:21,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:21,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:21,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:21,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:30:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:22,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:30:22,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:30:22,148 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:22,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529514587] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:22,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:22,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-23 23:30:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765630821] [2024-11-23 23:30:22,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:22,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:30:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:22,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:30:22,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:30:22,155 INFO L87 Difference]: Start difference. First operand 662 states and 1098 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:30:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:22,322 INFO L93 Difference]: Finished difference Result 1324 states and 2199 transitions. [2024-11-23 23:30:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:30:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2024-11-23 23:30:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:22,329 INFO L225 Difference]: With dead ends: 1324 [2024-11-23 23:30:22,329 INFO L226 Difference]: Without dead ends: 685 [2024-11-23 23:30:22,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:30:22,334 INFO L435 NwaCegarLoop]: 958 mSDtfsCounter, 111 mSDsluCounter, 4674 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 5632 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:22,334 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 5632 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:22,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2024-11-23 23:30:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 662. [2024-11-23 23:30:22,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 529 states have (on average 1.6862003780718335) internal successors, (892), 549 states have internal predecessors, (892), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2024-11-23 23:30:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1098 transitions. [2024-11-23 23:30:22,366 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1098 transitions. Word has length 89 [2024-11-23 23:30:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:22,366 INFO L471 AbstractCegarLoop]: Abstraction has 662 states and 1098 transitions. [2024-11-23 23:30:22,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:30:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1098 transitions. [2024-11-23 23:30:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-23 23:30:22,369 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:22,370 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:22,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:22,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-23 23:30:22,571 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:22,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:22,571 INFO L85 PathProgramCache]: Analyzing trace with hash -571437870, now seen corresponding path program 1 times [2024-11-23 23:30:22,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:22,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613318285] [2024-11-23 23:30:22,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:22,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-23 23:30:22,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:22,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613318285] [2024-11-23 23:30:22,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613318285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:22,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972336541] [2024-11-23 23:30:22,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:22,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:22,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:22,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:22,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:30:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:23,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:30:23,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:30:23,179 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:23,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972336541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:23,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:23,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-11-23 23:30:23,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505677460] [2024-11-23 23:30:23,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:23,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:30:23,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:23,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:30:23,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:30:23,181 INFO L87 Difference]: Start difference. First operand 662 states and 1098 transitions. Second operand has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:30:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:23,410 INFO L93 Difference]: Finished difference Result 1327 states and 2203 transitions. [2024-11-23 23:30:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:30:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2024-11-23 23:30:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:23,420 INFO L225 Difference]: With dead ends: 1327 [2024-11-23 23:30:23,420 INFO L226 Difference]: Without dead ends: 688 [2024-11-23 23:30:23,423 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:30:23,424 INFO L435 NwaCegarLoop]: 948 mSDtfsCounter, 95 mSDsluCounter, 5591 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 6539 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:23,424 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 6539 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2024-11-23 23:30:23,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 662. [2024-11-23 23:30:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 529 states have (on average 1.6862003780718335) internal successors, (892), 549 states have internal predecessors, (892), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2024-11-23 23:30:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1098 transitions. [2024-11-23 23:30:23,464 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1098 transitions. Word has length 89 [2024-11-23 23:30:23,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:23,464 INFO L471 AbstractCegarLoop]: Abstraction has 662 states and 1098 transitions. [2024-11-23 23:30:23,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:30:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1098 transitions. [2024-11-23 23:30:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-23 23:30:23,467 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:23,467 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:23,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:23,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:23,668 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:23,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:23,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2056575677, now seen corresponding path program 1 times [2024-11-23 23:30:23,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:23,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621361221] [2024-11-23 23:30:23,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:23,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-23 23:30:23,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:23,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621361221] [2024-11-23 23:30:23,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621361221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:23,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933659596] [2024-11-23 23:30:23,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:23,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:23,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:23,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:30:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:24,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:30:24,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 23:30:24,306 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:24,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933659596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:24,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:24,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-11-23 23:30:24,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484958215] [2024-11-23 23:30:24,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:24,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:30:24,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:24,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:30:24,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:30:24,308 INFO L87 Difference]: Start difference. First operand 662 states and 1098 transitions. Second operand has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:30:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:24,538 INFO L93 Difference]: Finished difference Result 1327 states and 2203 transitions. [2024-11-23 23:30:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:30:24,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 90 [2024-11-23 23:30:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:24,546 INFO L225 Difference]: With dead ends: 1327 [2024-11-23 23:30:24,546 INFO L226 Difference]: Without dead ends: 688 [2024-11-23 23:30:24,550 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:30:24,550 INFO L435 NwaCegarLoop]: 948 mSDtfsCounter, 105 mSDsluCounter, 5579 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6527 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:24,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 6527 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2024-11-23 23:30:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 662. [2024-11-23 23:30:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 529 states have (on average 1.6862003780718335) internal successors, (892), 549 states have internal predecessors, (892), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2024-11-23 23:30:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1098 transitions. [2024-11-23 23:30:24,581 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1098 transitions. Word has length 90 [2024-11-23 23:30:24,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:24,581 INFO L471 AbstractCegarLoop]: Abstraction has 662 states and 1098 transitions. [2024-11-23 23:30:24,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:30:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1098 transitions. [2024-11-23 23:30:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-23 23:30:24,584 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:24,584 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:24,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 23:30:24,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:24,788 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:24,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:24,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1443976590, now seen corresponding path program 1 times [2024-11-23 23:30:24,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:24,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470162319] [2024-11-23 23:30:24,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:24,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:30:24,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:24,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470162319] [2024-11-23 23:30:24,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470162319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:24,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558291449] [2024-11-23 23:30:24,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:24,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:24,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:24,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:24,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:30:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:25,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:30:25,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:30:25,426 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:25,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558291449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:25,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:25,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-11-23 23:30:25,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77769780] [2024-11-23 23:30:25,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:25,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:30:25,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:25,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:30:25,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:30:25,428 INFO L87 Difference]: Start difference. First operand 662 states and 1098 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:25,631 INFO L93 Difference]: Finished difference Result 1318 states and 2188 transitions. [2024-11-23 23:30:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:30:25,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 107 [2024-11-23 23:30:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:25,639 INFO L225 Difference]: With dead ends: 1318 [2024-11-23 23:30:25,639 INFO L226 Difference]: Without dead ends: 679 [2024-11-23 23:30:25,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:30:25,642 INFO L435 NwaCegarLoop]: 948 mSDtfsCounter, 115 mSDsluCounter, 5567 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 6515 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:25,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 6515 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2024-11-23 23:30:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 662. [2024-11-23 23:30:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 529 states have (on average 1.6862003780718335) internal successors, (892), 549 states have internal predecessors, (892), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2024-11-23 23:30:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1098 transitions. [2024-11-23 23:30:25,672 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1098 transitions. Word has length 107 [2024-11-23 23:30:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:25,673 INFO L471 AbstractCegarLoop]: Abstraction has 662 states and 1098 transitions. [2024-11-23 23:30:25,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1098 transitions. [2024-11-23 23:30:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-23 23:30:25,676 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:25,676 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:25,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:30:25,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-23 23:30:25,880 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:25,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash -143998187, now seen corresponding path program 1 times [2024-11-23 23:30:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:25,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433842588] [2024-11-23 23:30:25,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:25,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:30:25,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:25,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433842588] [2024-11-23 23:30:25,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433842588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:25,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539635014] [2024-11-23 23:30:25,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:25,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:25,987 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:25,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:30:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:26,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:30:26,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:30:26,336 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:26,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539635014] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:26,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:26,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:30:26,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967206996] [2024-11-23 23:30:26,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:26,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:30:26,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:26,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:30:26,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:26,337 INFO L87 Difference]: Start difference. First operand 662 states and 1098 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-23 23:30:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:26,423 INFO L93 Difference]: Finished difference Result 1290 states and 2148 transitions. [2024-11-23 23:30:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:30:26,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2024-11-23 23:30:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:26,429 INFO L225 Difference]: With dead ends: 1290 [2024-11-23 23:30:26,430 INFO L226 Difference]: Without dead ends: 662 [2024-11-23 23:30:26,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:30:26,433 INFO L435 NwaCegarLoop]: 956 mSDtfsCounter, 20 mSDsluCounter, 1906 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:26,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2862 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:30:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2024-11-23 23:30:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2024-11-23 23:30:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 529 states have (on average 1.6767485822306238) internal successors, (887), 549 states have internal predecessors, (887), 103 states have call successors, (103), 29 states have call predecessors, (103), 29 states have return successors, (103), 97 states have call predecessors, (103), 100 states have call successors, (103) [2024-11-23 23:30:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1093 transitions. [2024-11-23 23:30:26,463 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1093 transitions. Word has length 91 [2024-11-23 23:30:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:26,463 INFO L471 AbstractCegarLoop]: Abstraction has 662 states and 1093 transitions. [2024-11-23 23:30:26,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-23 23:30:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1093 transitions. [2024-11-23 23:30:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-23 23:30:26,467 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:26,468 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:26,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 23:30:26,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:26,669 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:26,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:26,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1082141184, now seen corresponding path program 1 times [2024-11-23 23:30:26,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:26,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549549278] [2024-11-23 23:30:26,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:26,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:30:26,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549549278] [2024-11-23 23:30:26,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549549278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559875787] [2024-11-23 23:30:26,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:26,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:26,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:26,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:26,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:30:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:27,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:30:27,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 23:30:27,123 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:27,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559875787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:27,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:27,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:30:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106268057] [2024-11-23 23:30:27,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:27,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:30:27,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:27,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:30:27,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:27,126 INFO L87 Difference]: Start difference. First operand 662 states and 1093 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-23 23:30:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:27,353 INFO L93 Difference]: Finished difference Result 1319 states and 2188 transitions. [2024-11-23 23:30:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:30:27,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 92 [2024-11-23 23:30:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:27,361 INFO L225 Difference]: With dead ends: 1319 [2024-11-23 23:30:27,361 INFO L226 Difference]: Without dead ends: 749 [2024-11-23 23:30:27,364 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:30:27,365 INFO L435 NwaCegarLoop]: 921 mSDtfsCounter, 171 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:27,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 2734 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:30:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2024-11-23 23:30:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 707. [2024-11-23 23:30:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 573 states have (on average 1.6945898778359512) internal successors, (971), 593 states have internal predecessors, (971), 103 states have call successors, (103), 30 states have call predecessors, (103), 30 states have return successors, (102), 97 states have call predecessors, (102), 100 states have call successors, (102) [2024-11-23 23:30:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1176 transitions. [2024-11-23 23:30:27,397 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1176 transitions. Word has length 92 [2024-11-23 23:30:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:27,398 INFO L471 AbstractCegarLoop]: Abstraction has 707 states and 1176 transitions. [2024-11-23 23:30:27,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-23 23:30:27,399 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1176 transitions. [2024-11-23 23:30:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-23 23:30:27,401 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:27,402 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:27,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-23 23:30:27,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:27,602 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:27,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash 105704088, now seen corresponding path program 1 times [2024-11-23 23:30:27,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:27,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868274796] [2024-11-23 23:30:27,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:30:27,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868274796] [2024-11-23 23:30:27,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868274796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392815294] [2024-11-23 23:30:27,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:27,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:27,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:27,709 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:27,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 23:30:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:28,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 1516 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:30:28,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-23 23:30:28,139 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:28,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392815294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:28,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:28,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2024-11-23 23:30:28,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119474204] [2024-11-23 23:30:28,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:28,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:30:28,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:28,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:30:28,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:30:28,142 INFO L87 Difference]: Start difference. First operand 707 states and 1176 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:28,295 INFO L93 Difference]: Finished difference Result 1312 states and 2175 transitions. [2024-11-23 23:30:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:30:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2024-11-23 23:30:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:28,304 INFO L225 Difference]: With dead ends: 1312 [2024-11-23 23:30:28,304 INFO L226 Difference]: Without dead ends: 742 [2024-11-23 23:30:28,307 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:30:28,309 INFO L435 NwaCegarLoop]: 959 mSDtfsCounter, 89 mSDsluCounter, 4706 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5665 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:28,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 5665 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2024-11-23 23:30:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 720. [2024-11-23 23:30:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 583 states have (on average 1.6912521440823327) internal successors, (986), 605 states have internal predecessors, (986), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2024-11-23 23:30:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1195 transitions. [2024-11-23 23:30:28,352 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1195 transitions. Word has length 109 [2024-11-23 23:30:28,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:28,353 INFO L471 AbstractCegarLoop]: Abstraction has 720 states and 1195 transitions. [2024-11-23 23:30:28,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1195 transitions. [2024-11-23 23:30:28,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-23 23:30:28,356 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:28,357 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:28,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:28,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:28,558 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:28,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1927892131, now seen corresponding path program 1 times [2024-11-23 23:30:28,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692391728] [2024-11-23 23:30:28,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:28,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:30:28,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692391728] [2024-11-23 23:30:28,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692391728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037642049] [2024-11-23 23:30:28,685 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:28,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:28,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:28,687 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:28,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 23:30:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:29,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:30:29,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-23 23:30:29,127 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:29,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037642049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:29,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:29,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2024-11-23 23:30:29,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166836557] [2024-11-23 23:30:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:29,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:30:29,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:29,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:30:29,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:30:29,130 INFO L87 Difference]: Start difference. First operand 720 states and 1195 transitions. Second operand has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:29,255 INFO L93 Difference]: Finished difference Result 1321 states and 2189 transitions. [2024-11-23 23:30:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:30:29,255 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2024-11-23 23:30:29,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:29,262 INFO L225 Difference]: With dead ends: 1321 [2024-11-23 23:30:29,262 INFO L226 Difference]: Without dead ends: 751 [2024-11-23 23:30:29,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:30:29,266 INFO L435 NwaCegarLoop]: 959 mSDtfsCounter, 100 mSDsluCounter, 4694 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 5653 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:29,266 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 5653 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2024-11-23 23:30:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 720. [2024-11-23 23:30:29,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 583 states have (on average 1.6912521440823327) internal successors, (986), 605 states have internal predecessors, (986), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2024-11-23 23:30:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1195 transitions. [2024-11-23 23:30:29,302 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1195 transitions. Word has length 110 [2024-11-23 23:30:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:29,303 INFO L471 AbstractCegarLoop]: Abstraction has 720 states and 1195 transitions. [2024-11-23 23:30:29,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1195 transitions. [2024-11-23 23:30:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-23 23:30:29,306 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:29,306 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:29,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 23:30:29,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 23:30:29,507 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:29,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash -285036579, now seen corresponding path program 1 times [2024-11-23 23:30:29,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:29,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632932207] [2024-11-23 23:30:29,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:29,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:30:29,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632932207] [2024-11-23 23:30:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632932207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533160079] [2024-11-23 23:30:29,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:29,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:29,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:29,616 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:29,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 23:30:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:29,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 1513 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:30:29,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-23 23:30:30,053 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:30,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533160079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:30,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:30,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2024-11-23 23:30:30,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865884939] [2024-11-23 23:30:30,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:30,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:30:30,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:30,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:30:30,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:30:30,055 INFO L87 Difference]: Start difference. First operand 720 states and 1195 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:30,252 INFO L93 Difference]: Finished difference Result 1324 states and 2192 transitions. [2024-11-23 23:30:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:30:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2024-11-23 23:30:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:30,259 INFO L225 Difference]: With dead ends: 1324 [2024-11-23 23:30:30,259 INFO L226 Difference]: Without dead ends: 754 [2024-11-23 23:30:30,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:30:30,264 INFO L435 NwaCegarLoop]: 949 mSDtfsCounter, 96 mSDsluCounter, 5600 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 6549 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:30,264 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 6549 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:30,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2024-11-23 23:30:30,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 720. [2024-11-23 23:30:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 583 states have (on average 1.6912521440823327) internal successors, (986), 605 states have internal predecessors, (986), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2024-11-23 23:30:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1195 transitions. [2024-11-23 23:30:30,298 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1195 transitions. Word has length 110 [2024-11-23 23:30:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:30,299 INFO L471 AbstractCegarLoop]: Abstraction has 720 states and 1195 transitions. [2024-11-23 23:30:30,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1195 transitions. [2024-11-23 23:30:30,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-23 23:30:30,302 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:30,302 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:30,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 23:30:30,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:30,507 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:30,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:30,507 INFO L85 PathProgramCache]: Analyzing trace with hash 53288255, now seen corresponding path program 1 times [2024-11-23 23:30:30,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:30,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715892594] [2024-11-23 23:30:30,507 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:30,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:30:30,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:30,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715892594] [2024-11-23 23:30:30,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715892594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:30,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107398405] [2024-11-23 23:30:30,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:30,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:30,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:30,611 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:30,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 23:30:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:30,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:30:30,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:30:30,978 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:30,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107398405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:30,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:30,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:30:30,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153585179] [2024-11-23 23:30:30,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:30,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:30:30,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:30,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:30:30,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:30,980 INFO L87 Difference]: Start difference. First operand 720 states and 1195 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-23 23:30:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:31,034 INFO L93 Difference]: Finished difference Result 1366 states and 2271 transitions. [2024-11-23 23:30:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:30:31,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 110 [2024-11-23 23:30:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:31,040 INFO L225 Difference]: With dead ends: 1366 [2024-11-23 23:30:31,040 INFO L226 Difference]: Without dead ends: 720 [2024-11-23 23:30:31,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:31,044 INFO L435 NwaCegarLoop]: 960 mSDtfsCounter, 2 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:31,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2871 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:30:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2024-11-23 23:30:31,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2024-11-23 23:30:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 583 states have (on average 1.686106346483705) internal successors, (983), 605 states have internal predecessors, (983), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2024-11-23 23:30:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1192 transitions. [2024-11-23 23:30:31,072 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1192 transitions. Word has length 110 [2024-11-23 23:30:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:31,074 INFO L471 AbstractCegarLoop]: Abstraction has 720 states and 1192 transitions. [2024-11-23 23:30:31,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-23 23:30:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1192 transitions. [2024-11-23 23:30:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-23 23:30:31,077 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:31,077 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:31,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 23:30:31,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:31,278 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:31,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash 379820122, now seen corresponding path program 1 times [2024-11-23 23:30:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:31,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709145419] [2024-11-23 23:30:31,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:30:31,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:31,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709145419] [2024-11-23 23:30:31,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709145419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:31,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563448207] [2024-11-23 23:30:31,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:31,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:31,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:31,369 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:31,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 23:30:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:31,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 1514 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:30:31,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-23 23:30:31,817 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563448207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:31,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:31,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2024-11-23 23:30:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550350181] [2024-11-23 23:30:31,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:31,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:30:31,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:31,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:30:31,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:30:31,819 INFO L87 Difference]: Start difference. First operand 720 states and 1192 transitions. Second operand has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:32,001 INFO L93 Difference]: Finished difference Result 1315 states and 2175 transitions. [2024-11-23 23:30:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:30:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 111 [2024-11-23 23:30:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:32,008 INFO L225 Difference]: With dead ends: 1315 [2024-11-23 23:30:32,008 INFO L226 Difference]: Without dead ends: 745 [2024-11-23 23:30:32,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:30:32,012 INFO L435 NwaCegarLoop]: 946 mSDtfsCounter, 106 mSDsluCounter, 5573 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 6519 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:32,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 6519 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2024-11-23 23:30:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 720. [2024-11-23 23:30:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 583 states have (on average 1.686106346483705) internal successors, (983), 605 states have internal predecessors, (983), 104 states have call successors, (104), 30 states have call predecessors, (104), 32 states have return successors, (105), 98 states have call predecessors, (105), 101 states have call successors, (105) [2024-11-23 23:30:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1192 transitions. [2024-11-23 23:30:32,044 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1192 transitions. Word has length 111 [2024-11-23 23:30:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:32,044 INFO L471 AbstractCegarLoop]: Abstraction has 720 states and 1192 transitions. [2024-11-23 23:30:32,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-23 23:30:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1192 transitions. [2024-11-23 23:30:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-23 23:30:32,047 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:32,047 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:32,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 23:30:32,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 23:30:32,248 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:32,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:32,249 INFO L85 PathProgramCache]: Analyzing trace with hash -854332181, now seen corresponding path program 1 times [2024-11-23 23:30:32,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:32,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458648203] [2024-11-23 23:30:32,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:32,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 23:30:32,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:32,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458648203] [2024-11-23 23:30:32,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458648203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:32,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087903413] [2024-11-23 23:30:32,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:32,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:32,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:32,349 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:32,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 23:30:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:32,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:30:32,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:30:32,931 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:30:32,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087903413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:32,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:30:32,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-23 23:30:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440550678] [2024-11-23 23:30:32,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:32,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:30:32,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:32,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:30:32,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:30:32,933 INFO L87 Difference]: Start difference. First operand 720 states and 1192 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2024-11-23 23:30:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:33,083 INFO L93 Difference]: Finished difference Result 1848 states and 3086 transitions. [2024-11-23 23:30:33,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:30:33,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 96 [2024-11-23 23:30:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:33,092 INFO L225 Difference]: With dead ends: 1848 [2024-11-23 23:30:33,093 INFO L226 Difference]: Without dead ends: 1282 [2024-11-23 23:30:33,096 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:30:33,096 INFO L435 NwaCegarLoop]: 1028 mSDtfsCounter, 893 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:33,096 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 1949 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2024-11-23 23:30:33,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1217. [2024-11-23 23:30:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 987 states have (on average 1.6919959473150963) internal successors, (1670), 1018 states have internal predecessors, (1670), 178 states have call successors, (178), 50 states have call predecessors, (178), 51 states have return successors, (185), 163 states have call predecessors, (185), 174 states have call successors, (185) [2024-11-23 23:30:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 2033 transitions. [2024-11-23 23:30:33,160 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 2033 transitions. Word has length 96 [2024-11-23 23:30:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:33,160 INFO L471 AbstractCegarLoop]: Abstraction has 1217 states and 2033 transitions. [2024-11-23 23:30:33,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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) [2024-11-23 23:30:33,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 2033 transitions. [2024-11-23 23:30:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-11-23 23:30:33,167 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:33,167 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:33,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 23:30:33,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 23:30:33,367 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:33,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1735996436, now seen corresponding path program 1 times [2024-11-23 23:30:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:33,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013470463] [2024-11-23 23:30:33,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:33,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-23 23:30:33,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:33,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013470463] [2024-11-23 23:30:33,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013470463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:33,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198718533] [2024-11-23 23:30:33,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:33,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:33,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:33,542 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:33,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 23:30:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:34,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 2205 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:30:34,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 23:30:34,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-23 23:30:34,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198718533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:34,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:34,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-11-23 23:30:34,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252601305] [2024-11-23 23:30:34,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:34,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:30:34,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:34,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:30:34,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:30:34,445 INFO L87 Difference]: Start difference. First operand 1217 states and 2033 transitions. Second operand has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 6 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (37), 6 states have call predecessors, (37), 6 states have call successors, (37) [2024-11-23 23:30:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:37,942 INFO L93 Difference]: Finished difference Result 3482 states and 5818 transitions. [2024-11-23 23:30:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:30:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 6 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (37), 6 states have call predecessors, (37), 6 states have call successors, (37) Word has length 187 [2024-11-23 23:30:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:37,959 INFO L225 Difference]: With dead ends: 3482 [2024-11-23 23:30:37,959 INFO L226 Difference]: Without dead ends: 2253 [2024-11-23 23:30:37,964 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 371 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:30:37,965 INFO L435 NwaCegarLoop]: 426 mSDtfsCounter, 1626 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 4484 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 4799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 4484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:37,965 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1685 Valid, 1992 Invalid, 4799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 4484 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-23 23:30:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2024-11-23 23:30:38,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1993. [2024-11-23 23:30:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1595 states have (on average 1.6539184952978057) internal successors, (2638), 1635 states have internal predecessors, (2638), 310 states have call successors, (310), 82 states have call predecessors, (310), 87 states have return successors, (356), 289 states have call predecessors, (356), 304 states have call successors, (356) [2024-11-23 23:30:38,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 3304 transitions. [2024-11-23 23:30:38,071 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 3304 transitions. Word has length 187 [2024-11-23 23:30:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:38,072 INFO L471 AbstractCegarLoop]: Abstraction has 1993 states and 3304 transitions. [2024-11-23 23:30:38,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 6 states have call successors, (39), 5 states have call predecessors, (39), 5 states have return successors, (37), 6 states have call predecessors, (37), 6 states have call successors, (37) [2024-11-23 23:30:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 3304 transitions. [2024-11-23 23:30:38,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-11-23 23:30:38,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:38,080 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-23 23:30:38,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-23 23:30:38,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:38,284 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:38,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:38,285 INFO L85 PathProgramCache]: Analyzing trace with hash -479637947, now seen corresponding path program 1 times [2024-11-23 23:30:38,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:38,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409411672] [2024-11-23 23:30:38,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:38,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-23 23:30:38,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409411672] [2024-11-23 23:30:38,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409411672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:30:38,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240891774] [2024-11-23 23:30:38,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:38,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:38,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:30:38,543 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:30:38,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 23:30:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:39,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 2200 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:30:39,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:30:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:30:39,200 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:30:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-23 23:30:39,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240891774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:30:39,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:30:39,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2024-11-23 23:30:39,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336907944] [2024-11-23 23:30:39,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:30:39,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 23:30:39,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:39,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 23:30:39,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:30:39,592 INFO L87 Difference]: Start difference. First operand 1993 states and 3304 transitions. Second operand has 12 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 6 states have call successors, (50), 5 states have call predecessors, (50), 7 states have return successors, (47), 6 states have call predecessors, (47), 6 states have call successors, (47) [2024-11-23 23:30:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:44,590 INFO L93 Difference]: Finished difference Result 4144 states and 6885 transitions. [2024-11-23 23:30:44,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 23:30:44,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 6 states have call successors, (50), 5 states have call predecessors, (50), 7 states have return successors, (47), 6 states have call predecessors, (47), 6 states have call successors, (47) Word has length 188 [2024-11-23 23:30:44,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:44,602 INFO L225 Difference]: With dead ends: 4144 [2024-11-23 23:30:44,603 INFO L226 Difference]: Without dead ends: 2168 [2024-11-23 23:30:44,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 373 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2024-11-23 23:30:44,612 INFO L435 NwaCegarLoop]: 412 mSDtfsCounter, 1945 mSDsluCounter, 3188 mSDsCounter, 0 mSdLazyCounter, 8430 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2038 SdHoareTripleChecker+Valid, 3600 SdHoareTripleChecker+Invalid, 8652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 8430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:44,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2038 Valid, 3600 Invalid, 8652 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [222 Valid, 8430 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-23 23:30:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2024-11-23 23:30:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1984. [2024-11-23 23:30:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1588 states have (on average 1.649874055415617) internal successors, (2620), 1626 states have internal predecessors, (2620), 308 states have call successors, (308), 82 states have call predecessors, (308), 87 states have return successors, (349), 289 states have call predecessors, (349), 302 states have call successors, (349) [2024-11-23 23:30:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 3277 transitions. [2024-11-23 23:30:44,712 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 3277 transitions. Word has length 188 [2024-11-23 23:30:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:44,713 INFO L471 AbstractCegarLoop]: Abstraction has 1984 states and 3277 transitions. [2024-11-23 23:30:44,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 6 states have call successors, (50), 5 states have call predecessors, (50), 7 states have return successors, (47), 6 states have call predecessors, (47), 6 states have call successors, (47) [2024-11-23 23:30:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 3277 transitions. [2024-11-23 23:30:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-23 23:30:44,720 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:44,720 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:44,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-23 23:30:44,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65284330-3eaa-4705-bab6-cb33ac9ddbb3/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:30:44,922 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:44,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:44,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1640005175, now seen corresponding path program 1 times [2024-11-23 23:30:44,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:44,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540986827] [2024-11-23 23:30:44,923 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-23 23:30:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:45,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540986827] [2024-11-23 23:30:45,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540986827] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:45,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:45,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 23:30:45,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132638255] [2024-11-23 23:30:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:45,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:30:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:45,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:30:45,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:30:45,101 INFO L87 Difference]: Start difference. First operand 1984 states and 3277 transitions. Second operand has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-23 23:30:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:45,285 INFO L93 Difference]: Finished difference Result 3910 states and 6470 transitions. [2024-11-23 23:30:45,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:30:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 136 [2024-11-23 23:30:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:45,295 INFO L225 Difference]: With dead ends: 3910 [2024-11-23 23:30:45,296 INFO L226 Difference]: Without dead ends: 2034 [2024-11-23 23:30:45,304 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:30:45,305 INFO L435 NwaCegarLoop]: 955 mSDtfsCounter, 126 mSDsluCounter, 4652 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 5607 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:45,305 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 5607 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:30:45,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2024-11-23 23:30:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1984. [2024-11-23 23:30:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1588 states have (on average 1.649874055415617) internal successors, (2620), 1626 states have internal predecessors, (2620), 308 states have call successors, (308), 82 states have call predecessors, (308), 87 states have return successors, (349), 289 states have call predecessors, (349), 302 states have call successors, (349) [2024-11-23 23:30:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 3277 transitions. [2024-11-23 23:30:45,398 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 3277 transitions. Word has length 136 [2024-11-23 23:30:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:45,398 INFO L471 AbstractCegarLoop]: Abstraction has 1984 states and 3277 transitions. [2024-11-23 23:30:45,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 3 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-11-23 23:30:45,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 3277 transitions. [2024-11-23 23:30:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-23 23:30:45,404 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:45,404 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:45,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-23 23:30:45,404 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:45,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:45,405 INFO L85 PathProgramCache]: Analyzing trace with hash -711515921, now seen corresponding path program 1 times [2024-11-23 23:30:45,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:45,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942514234] [2024-11-23 23:30:45,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:45,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 23:30:45,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:45,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942514234] [2024-11-23 23:30:45,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942514234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:45,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:45,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:30:45,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12665193] [2024-11-23 23:30:45,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:45,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:30:45,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:45,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:30:45,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:30:45,503 INFO L87 Difference]: Start difference. First operand 1984 states and 3277 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-23 23:30:45,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:45,602 INFO L93 Difference]: Finished difference Result 3923 states and 6497 transitions. [2024-11-23 23:30:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:30:45,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 136 [2024-11-23 23:30:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:45,615 INFO L225 Difference]: With dead ends: 3923 [2024-11-23 23:30:45,615 INFO L226 Difference]: Without dead ends: 1942 [2024-11-23 23:30:45,623 INFO L434 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 [2024-11-23 23:30:45,625 INFO L435 NwaCegarLoop]: 956 mSDtfsCounter, 8 mSDsluCounter, 1906 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:45,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 2862 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:30:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2024-11-23 23:30:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1942. [2024-11-23 23:30:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1549 states have (on average 1.644286636539703) internal successors, (2547), 1585 states have internal predecessors, (2547), 307 states have call successors, (307), 82 states have call predecessors, (307), 85 states have return successors, (346), 288 states have call predecessors, (346), 301 states have call successors, (346) [2024-11-23 23:30:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 3200 transitions. [2024-11-23 23:30:45,740 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 3200 transitions. Word has length 136 [2024-11-23 23:30:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:45,740 INFO L471 AbstractCegarLoop]: Abstraction has 1942 states and 3200 transitions. [2024-11-23 23:30:45,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-23 23:30:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 3200 transitions. [2024-11-23 23:30:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-23 23:30:45,746 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:45,746 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:45,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-23 23:30:45,747 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:45,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:45,747 INFO L85 PathProgramCache]: Analyzing trace with hash -998314310, now seen corresponding path program 1 times [2024-11-23 23:30:45,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:45,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202460399] [2024-11-23 23:30:45,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:45,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:30:45,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:45,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202460399] [2024-11-23 23:30:45,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202460399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:45,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:45,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:30:45,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131701901] [2024-11-23 23:30:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:45,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:30:45,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:45,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:30:45,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:45,921 INFO L87 Difference]: Start difference. First operand 1942 states and 3200 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:30:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:49,332 INFO L93 Difference]: Finished difference Result 5124 states and 8707 transitions. [2024-11-23 23:30:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:30:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 137 [2024-11-23 23:30:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:49,348 INFO L225 Difference]: With dead ends: 5124 [2024-11-23 23:30:49,348 INFO L226 Difference]: Without dead ends: 3252 [2024-11-23 23:30:49,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:30:49,358 INFO L435 NwaCegarLoop]: 680 mSDtfsCounter, 3933 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 4092 mSolverCounterSat, 996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3971 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 4092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:49,358 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3971 Valid, 1625 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [996 Valid, 4092 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-23 23:30:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2024-11-23 23:30:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2974. [2024-11-23 23:30:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2344 states have (on average 1.6267064846416381) internal successors, (3813), 2408 states have internal predecessors, (3813), 497 states have call successors, (497), 122 states have call predecessors, (497), 132 states have return successors, (587), 476 states have call predecessors, (587), 489 states have call successors, (587) [2024-11-23 23:30:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 4897 transitions. [2024-11-23 23:30:49,514 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 4897 transitions. Word has length 137 [2024-11-23 23:30:49,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:49,514 INFO L471 AbstractCegarLoop]: Abstraction has 2974 states and 4897 transitions. [2024-11-23 23:30:49,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:30:49,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 4897 transitions. [2024-11-23 23:30:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-23 23:30:49,523 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:49,523 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:49,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-23 23:30:49,524 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:49,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2080207923, now seen corresponding path program 1 times [2024-11-23 23:30:49,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:49,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902237538] [2024-11-23 23:30:49,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:30:49,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:49,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902237538] [2024-11-23 23:30:49,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902237538] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:49,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:49,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:30:49,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215685566] [2024-11-23 23:30:49,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:49,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:30:49,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:49,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:30:49,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:49,697 INFO L87 Difference]: Start difference. First operand 2974 states and 4897 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:30:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:53,188 INFO L93 Difference]: Finished difference Result 8779 states and 15068 transitions. [2024-11-23 23:30:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:30:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 138 [2024-11-23 23:30:53,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:53,224 INFO L225 Difference]: With dead ends: 8779 [2024-11-23 23:30:53,224 INFO L226 Difference]: Without dead ends: 5875 [2024-11-23 23:30:53,242 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:30:53,243 INFO L435 NwaCegarLoop]: 674 mSDtfsCounter, 3954 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 4055 mSolverCounterSat, 1021 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3993 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 5076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1021 IncrementalHoareTripleChecker+Valid, 4055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:53,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3993 Valid, 1649 Invalid, 5076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1021 Valid, 4055 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-23 23:30:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2024-11-23 23:30:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 5278. [2024-11-23 23:30:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 4082 states have (on average 1.6068103870651642) internal successors, (6559), 4215 states have internal predecessors, (6559), 958 states have call successors, (958), 202 states have call predecessors, (958), 237 states have return successors, (1216), 940 states have call predecessors, (1216), 946 states have call successors, (1216) [2024-11-23 23:30:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 8733 transitions. [2024-11-23 23:30:53,632 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 8733 transitions. Word has length 138 [2024-11-23 23:30:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:53,632 INFO L471 AbstractCegarLoop]: Abstraction has 5278 states and 8733 transitions. [2024-11-23 23:30:53,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:30:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 8733 transitions. [2024-11-23 23:30:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-23 23:30:53,638 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:53,638 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:53,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-23 23:30:53,639 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:53,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1718967883, now seen corresponding path program 1 times [2024-11-23 23:30:53,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:53,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719903186] [2024-11-23 23:30:53,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:53,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:30:53,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:53,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719903186] [2024-11-23 23:30:53,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719903186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:53,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:53,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:30:53,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630112642] [2024-11-23 23:30:53,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:53,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:30:53,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:53,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:30:53,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:53,868 INFO L87 Difference]: Start difference. First operand 5278 states and 8733 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:30:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:30:57,827 INFO L93 Difference]: Finished difference Result 17301 states and 30336 transitions. [2024-11-23 23:30:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:30:57,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 139 [2024-11-23 23:30:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:30:57,905 INFO L225 Difference]: With dead ends: 17301 [2024-11-23 23:30:57,905 INFO L226 Difference]: Without dead ends: 12093 [2024-11-23 23:30:57,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:30:57,945 INFO L435 NwaCegarLoop]: 688 mSDtfsCounter, 3991 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 1032 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4031 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 5095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1032 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:30:57,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4031 Valid, 1679 Invalid, 5095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1032 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-23 23:30:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12093 states. [2024-11-23 23:30:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12093 to 10624. [2024-11-23 23:30:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10624 states, 8019 states have (on average 1.584486843746103) internal successors, (12706), 8328 states have internal predecessors, (12706), 2121 states have call successors, (2121), 362 states have call predecessors, (2121), 483 states have return successors, (2939), 2132 states have call predecessors, (2939), 2101 states have call successors, (2939) [2024-11-23 23:30:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 17766 transitions. [2024-11-23 23:30:59,053 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 17766 transitions. Word has length 139 [2024-11-23 23:30:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:30:59,054 INFO L471 AbstractCegarLoop]: Abstraction has 10624 states and 17766 transitions. [2024-11-23 23:30:59,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:30:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 17766 transitions. [2024-11-23 23:30:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-23 23:30:59,061 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:30:59,061 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:30:59,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-23 23:30:59,062 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:30:59,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:30:59,062 INFO L85 PathProgramCache]: Analyzing trace with hash 316549198, now seen corresponding path program 1 times [2024-11-23 23:30:59,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:30:59,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730014935] [2024-11-23 23:30:59,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:30:59,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:30:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:30:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:30:59,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:30:59,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730014935] [2024-11-23 23:30:59,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730014935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:30:59,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:30:59,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:30:59,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61980004] [2024-11-23 23:30:59,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:30:59,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:30:59,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:30:59,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:30:59,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:30:59,302 INFO L87 Difference]: Start difference. First operand 10624 states and 17766 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:31:04,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:31:04,490 INFO L93 Difference]: Finished difference Result 38103 states and 68875 transitions. [2024-11-23 23:31:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:31:04,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 140 [2024-11-23 23:31:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:31:04,703 INFO L225 Difference]: With dead ends: 38103 [2024-11-23 23:31:04,703 INFO L226 Difference]: Without dead ends: 27549 [2024-11-23 23:31:04,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:31:04,822 INFO L435 NwaCegarLoop]: 694 mSDtfsCounter, 4033 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 4071 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4074 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 5116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 4071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:31:04,823 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4074 Valid, 1695 Invalid, 5116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 4071 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-23 23:31:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27549 states. [2024-11-23 23:31:07,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27549 to 23626. [2024-11-23 23:31:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23626 states, 17360 states have (on average 1.5606566820276497) internal successors, (27093), 18133 states have internal predecessors, (27093), 5172 states have call successors, (5172), 682 states have call predecessors, (5172), 1093 states have return successors, (7856), 5316 states have call predecessors, (7856), 5136 states have call successors, (7856) [2024-11-23 23:31:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23626 states to 23626 states and 40121 transitions. [2024-11-23 23:31:07,690 INFO L78 Accepts]: Start accepts. Automaton has 23626 states and 40121 transitions. Word has length 140 [2024-11-23 23:31:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:31:07,691 INFO L471 AbstractCegarLoop]: Abstraction has 23626 states and 40121 transitions. [2024-11-23 23:31:07,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:31:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 23626 states and 40121 transitions. [2024-11-23 23:31:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-23 23:31:07,697 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:31:07,697 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:31:07,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-23 23:31:07,698 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:31:07,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:31:07,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1456047952, now seen corresponding path program 1 times [2024-11-23 23:31:07,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:31:07,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233197305] [2024-11-23 23:31:07,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:31:07,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:31:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:31:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:31:07,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:31:07,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233197305] [2024-11-23 23:31:07,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233197305] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:31:07,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:31:07,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:31:07,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582614381] [2024-11-23 23:31:07,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:31:07,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:31:07,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:31:07,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:31:07,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:31:07,866 INFO L87 Difference]: Start difference. First operand 23626 states and 40121 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:31:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:31:16,342 INFO L93 Difference]: Finished difference Result 91497 states and 171344 transitions. [2024-11-23 23:31:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:31:16,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 141 [2024-11-23 23:31:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:31:16,845 INFO L225 Difference]: With dead ends: 91497 [2024-11-23 23:31:16,845 INFO L226 Difference]: Without dead ends: 67941 [2024-11-23 23:31:17,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:31:17,169 INFO L435 NwaCegarLoop]: 692 mSDtfsCounter, 4080 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 4076 mSolverCounterSat, 1071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4122 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 5147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1071 IncrementalHoareTripleChecker+Valid, 4076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:31:17,171 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4122 Valid, 1698 Invalid, 5147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1071 Valid, 4076 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-23 23:31:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67941 states. [2024-11-23 23:31:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67941 to 56892. [2024-11-23 23:31:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56892 states, 40729 states have (on average 1.5370865967737974) internal successors, (62604), 42762 states have internal predecessors, (62604), 13463 states have call successors, (13463), 1322 states have call predecessors, (13463), 2699 states have return successors, (22327), 14116 states have call predecessors, (22327), 13395 states have call successors, (22327) [2024-11-23 23:31:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56892 states to 56892 states and 98394 transitions. [2024-11-23 23:31:23,259 INFO L78 Accepts]: Start accepts. Automaton has 56892 states and 98394 transitions. Word has length 141 [2024-11-23 23:31:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:31:23,259 INFO L471 AbstractCegarLoop]: Abstraction has 56892 states and 98394 transitions. [2024-11-23 23:31:23,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-23 23:31:23,260 INFO L276 IsEmpty]: Start isEmpty. Operand 56892 states and 98394 transitions. [2024-11-23 23:31:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-23 23:31:23,265 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:31:23,265 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:31:23,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-23 23:31:23,266 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:31:23,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:31:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash 82292078, now seen corresponding path program 1 times [2024-11-23 23:31:23,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:31:23,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045859453] [2024-11-23 23:31:23,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:31:23,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:31:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:31:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:31:23,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:31:23,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045859453] [2024-11-23 23:31:23,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045859453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:31:23,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:31:23,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-23 23:31:23,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938160426] [2024-11-23 23:31:23,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:31:23,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 23:31:23,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:31:23,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 23:31:23,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:31:23,524 INFO L87 Difference]: Start difference. First operand 56892 states and 98394 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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)