./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.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_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/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_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/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_f886f48d-11af-40e3-a512-dca17b8137ec/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 e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:45:20,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:45:20,377 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 23:45:20,382 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:45:20,382 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:45:20,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:45:20,416 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:45:20,417 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:45:20,417 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:45:20,418 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:45:20,418 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:45:20,418 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:45:20,419 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:45:20,419 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:45:20,419 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:45:20,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:45:20,420 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:45:20,421 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:45:20,421 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:45:20,421 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:45:20,421 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:45:20,421 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:45:20,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:45:20,421 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:45:20,422 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:45:20,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:45:20,422 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:45:20,422 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:45:20,422 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:45:20,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:45:20,422 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:45:20,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:45:20,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:45:20,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:45:20,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:45:20,423 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:45:20,423 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:45:20,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:45:20,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:45:20,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:45:20,424 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:45:20,424 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:45:20,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:45:20,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:45:20,425 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:45:20,425 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:45:20,425 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:45:20,425 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:45:20,425 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_f886f48d-11af-40e3-a512-dca17b8137ec/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 -> e7c9485412041f5ced738777edbcc586e5ce326d6f265b136a50fe41e5db19fb [2024-11-23 23:45:20,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:45:20,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:45:20,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:45:20,716 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:45:20,717 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:45:20,718 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2024-11-23 23:45:23,664 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/data/1aba6aae0/f81f81818c7149d19bbc98c39ef0936b/FLAG3e6b75f1a [2024-11-23 23:45:24,164 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:45:24,167 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c [2024-11-23 23:45:24,197 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/data/1aba6aae0/f81f81818c7149d19bbc98c39ef0936b/FLAG3e6b75f1a [2024-11-23 23:45:24,250 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/data/1aba6aae0/f81f81818c7149d19bbc98c39ef0936b [2024-11-23 23:45:24,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:45:24,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:45:24,255 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:45:24,256 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:45:24,261 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:45:24,262 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:45:24" (1/1) ... [2024-11-23 23:45:24,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5574d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:24, skipping insertion in model container [2024-11-23 23:45:24,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:45:24" (1/1) ... [2024-11-23 23:45:24,356 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:45:24,560 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_f886f48d-11af-40e3-a512-dca17b8137ec/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2024-11-23 23:45:25,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:45:25,028 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:45:25,036 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2024-11-23 23:45:25,038 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [57] [2024-11-23 23:45:25,038 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [160] [2024-11-23 23:45:25,038 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [251] [2024-11-23 23:45:25,039 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [604] [2024-11-23 23:45:25,039 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [1271] [2024-11-23 23:45:25,039 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1391] [2024-11-23 23:45:25,039 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [1426] [2024-11-23 23:45:25,040 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1792] [2024-11-23 23:45:25,040 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3453] [2024-11-23 23:45:25,045 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_f886f48d-11af-40e3-a512-dca17b8137ec/sv-benchmarks/c/product-lines/elevator_spec13_product32.cil.c[1546,1559] [2024-11-23 23:45:25,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:45:25,259 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:45:25,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25 WrapperNode [2024-11-23 23:45:25,262 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:45:25,263 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:45:25,263 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:45:25,263 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:45:25,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,312 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,387 INFO L138 Inliner]: procedures = 97, calls = 354, calls flagged for inlining = 30, calls inlined = 26, statements flattened = 936 [2024-11-23 23:45:25,387 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:45:25,388 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:45:25,388 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:45:25,388 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:45:25,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,406 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,450 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 23:45:25,450 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,450 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,478 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,484 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,548 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,570 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:45:25,571 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:45:25,571 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:45:25,571 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:45:25,572 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (1/1) ... [2024-11-23 23:45:25,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:45:25,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:25,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:45:25,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:45:25,648 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2024-11-23 23:45:25,648 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2024-11-23 23:45:25,648 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2024-11-23 23:45:25,648 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2024-11-23 23:45:25,649 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2024-11-23 23:45:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2024-11-23 23:45:25,649 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2024-11-23 23:45:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2024-11-23 23:45:25,649 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2024-11-23 23:45:25,649 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2024-11-23 23:45:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2024-11-23 23:45:25,650 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2024-11-23 23:45:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2024-11-23 23:45:25,650 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2024-11-23 23:45:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2024-11-23 23:45:25,651 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2024-11-23 23:45:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2024-11-23 23:45:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2024-11-23 23:45:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2024-11-23 23:45:25,654 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2024-11-23 23:45:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2024-11-23 23:45:25,654 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2024-11-23 23:45:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2024-11-23 23:45:25,654 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2024-11-23 23:45:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2024-11-23 23:45:25,654 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2024-11-23 23:45:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:45:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2024-11-23 23:45:25,654 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2024-11-23 23:45:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2024-11-23 23:45:25,654 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2024-11-23 23:45:25,654 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2024-11-23 23:45:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2024-11-23 23:45:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2024-11-23 23:45:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2024-11-23 23:45:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2024-11-23 23:45:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2024-11-23 23:45:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-23 23:45:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-23 23:45:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2024-11-23 23:45:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2024-11-23 23:45:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2024-11-23 23:45:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2024-11-23 23:45:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2024-11-23 23:45:25,655 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2024-11-23 23:45:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2024-11-23 23:45:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2024-11-23 23:45:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2024-11-23 23:45:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2024-11-23 23:45:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-23 23:45:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#12 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#13 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#14 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#15 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#16 [2024-11-23 23:45:25,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#17 [2024-11-23 23:45:25,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#18 [2024-11-23 23:45:25,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#19 [2024-11-23 23:45:25,664 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2024-11-23 23:45:25,664 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2024-11-23 23:45:25,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:45:25,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:45:25,664 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2024-11-23 23:45:25,664 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2024-11-23 23:45:25,664 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2024-11-23 23:45:25,665 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2024-11-23 23:45:25,887 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:45:25,891 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:45:27,643 INFO L? ?]: Removed 498 outVars from TransFormulas that were not future-live. [2024-11-23 23:45:27,643 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:45:27,682 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:45:27,686 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-23 23:45:27,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:45:27 BoogieIcfgContainer [2024-11-23 23:45:27,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:45:27,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:45:27,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:45:27,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:45:27,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:45:24" (1/3) ... [2024-11-23 23:45:27,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5ff41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:45:27, skipping insertion in model container [2024-11-23 23:45:27,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:45:25" (2/3) ... [2024-11-23 23:45:27,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5ff41b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:45:27, skipping insertion in model container [2024-11-23 23:45:27,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:45:27" (3/3) ... [2024-11-23 23:45:27,702 INFO L128 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product32.cil.c [2024-11-23 23:45:27,718 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:45:27,721 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG elevator_spec13_product32.cil.c that has 30 procedures, 633 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-23 23:45:27,820 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:45:27,834 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;@167e7889, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:45:27,835 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-23 23:45:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 633 states, 492 states have (on average 1.6788617886178863) internal successors, (826), 512 states have internal predecessors, (826), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2024-11-23 23:45:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-23 23:45:27,867 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:27,868 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 23:45:27,869 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:27,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:27,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1364393563, now seen corresponding path program 1 times [2024-11-23 23:45:27,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:27,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227827294] [2024-11-23 23:45:27,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:27,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:28,598 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 23:45:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:28,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227827294] [2024-11-23 23:45:28,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227827294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:28,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096400807] [2024-11-23 23:45:28,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:28,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:28,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:28,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:28,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:45:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:29,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:45:29,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:29,183 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 23:45:29,184 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096400807] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:29,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:29,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:45:29,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719521267] [2024-11-23 23:45:29,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:29,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:45:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:29,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:45:29,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:45:29,213 INFO L87 Difference]: Start difference. First operand has 633 states, 492 states have (on average 1.6788617886178863) internal successors, (826), 512 states have internal predecessors, (826), 110 states have call successors, (110), 29 states have call predecessors, (110), 29 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) 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 23:45:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:29,444 INFO L93 Difference]: Finished difference Result 1265 states and 2108 transitions. [2024-11-23 23:45:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:45:29,447 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 23:45:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:29,466 INFO L225 Difference]: With dead ends: 1265 [2024-11-23 23:45:29,466 INFO L226 Difference]: Without dead ends: 632 [2024-11-23 23:45:29,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:45:29,478 INFO L435 NwaCegarLoop]: 1021 mSDtfsCounter, 17 mSDsluCounter, 2034 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3055 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 23:45:29,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3055 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2024-11-23 23:45:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2024-11-23 23:45:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 493 states have (on average 1.6632860040567952) internal successors, (820), 511 states have internal predecessors, (820), 110 states have call successors, (110), 30 states have call predecessors, (110), 28 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2024-11-23 23:45:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1037 transitions. [2024-11-23 23:45:29,598 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1037 transitions. Word has length 99 [2024-11-23 23:45:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:29,598 INFO L471 AbstractCegarLoop]: Abstraction has 632 states and 1037 transitions. [2024-11-23 23:45:29,599 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 23:45:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1037 transitions. [2024-11-23 23:45:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-23 23:45:29,608 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:29,608 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 23:45:29,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:45:29,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-23 23:45:29,809 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:29,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash 932749170, now seen corresponding path program 1 times [2024-11-23 23:45:29,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:29,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692884199] [2024-11-23 23:45:29,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:29,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:30,314 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 23:45:30,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692884199] [2024-11-23 23:45:30,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692884199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078871691] [2024-11-23 23:45:30,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:30,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:30,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:30,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:30,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:45:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:30,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:45:30,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:30,743 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 23:45:30,744 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:30,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078871691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:30,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:30,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-23 23:45:30,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364075831] [2024-11-23 23:45:30,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:30,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:45:30,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:30,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:45:30,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:45:30,746 INFO L87 Difference]: Start difference. First operand 632 states and 1037 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 23:45:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:31,113 INFO L93 Difference]: Finished difference Result 1317 states and 2178 transitions. [2024-11-23 23:45:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:45:31,113 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 23:45:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:31,121 INFO L225 Difference]: With dead ends: 1317 [2024-11-23 23:45:31,122 INFO L226 Difference]: Without dead ends: 695 [2024-11-23 23:45:31,125 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 23:45:31,126 INFO L435 NwaCegarLoop]: 998 mSDtfsCounter, 122 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 2917 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 23:45:31,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 2917 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 23:45:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2024-11-23 23:45:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 677. [2024-11-23 23:45:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 537 states have (on average 1.6834264432029795) internal successors, (904), 555 states have internal predecessors, (904), 110 states have call successors, (110), 31 states have call predecessors, (110), 29 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2024-11-23 23:45:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1121 transitions. [2024-11-23 23:45:31,206 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1121 transitions. Word has length 85 [2024-11-23 23:45:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:31,206 INFO L471 AbstractCegarLoop]: Abstraction has 677 states and 1121 transitions. [2024-11-23 23:45:31,206 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 23:45:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1121 transitions. [2024-11-23 23:45:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-23 23:45:31,210 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:31,210 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] [2024-11-23 23:45:31,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:45:31,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-23 23:45:31,411 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:31,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash -561478831, now seen corresponding path program 1 times [2024-11-23 23:45:31,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:31,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393163991] [2024-11-23 23:45:31,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:31,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:45:31,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:31,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393163991] [2024-11-23 23:45:31,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393163991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:31,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258844220] [2024-11-23 23:45:31,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:31,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:31,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:31,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:31,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:45:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:32,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:45:32,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-23 23:45:32,304 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:32,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258844220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:32,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:32,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-23 23:45:32,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028527906] [2024-11-23 23:45:32,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:32,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:45:32,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:32,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:45:32,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:45:32,307 INFO L87 Difference]: Start difference. First operand 677 states and 1121 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 23:45:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:32,495 INFO L93 Difference]: Finished difference Result 1369 states and 2269 transitions. [2024-11-23 23:45:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:45:32,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 103 [2024-11-23 23:45:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:32,508 INFO L225 Difference]: With dead ends: 1369 [2024-11-23 23:45:32,510 INFO L226 Difference]: Without dead ends: 702 [2024-11-23 23:45:32,514 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 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 23:45:32,515 INFO L435 NwaCegarLoop]: 1010 mSDtfsCounter, 89 mSDsluCounter, 4958 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5968 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 23:45:32,515 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 5968 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2024-11-23 23:45:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 690. [2024-11-23 23:45:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 547 states have (on average 1.680073126142596) internal successors, (919), 567 states have internal predecessors, (919), 111 states have call successors, (111), 31 states have call predecessors, (111), 31 states have return successors, (112), 105 states have call predecessors, (112), 108 states have call successors, (112) [2024-11-23 23:45:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1142 transitions. [2024-11-23 23:45:32,583 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1142 transitions. Word has length 103 [2024-11-23 23:45:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:32,583 INFO L471 AbstractCegarLoop]: Abstraction has 690 states and 1142 transitions. [2024-11-23 23:45:32,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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 23:45:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1142 transitions. [2024-11-23 23:45:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-23 23:45:32,589 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:32,589 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 23:45:32,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 23:45:32,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:32,790 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:32,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1931567730, now seen corresponding path program 1 times [2024-11-23 23:45:32,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:32,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683414764] [2024-11-23 23:45:32,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:32,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:33,163 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 23:45:33,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:33,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683414764] [2024-11-23 23:45:33,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683414764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:33,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700831286] [2024-11-23 23:45:33,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:33,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:33,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:33,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:33,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:45:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:33,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:45:33,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:33,660 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 23:45:33,660 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:33,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700831286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:33,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:33,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-23 23:45:33,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570686333] [2024-11-23 23:45:33,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:33,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:45:33,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:33,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:45:33,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:45:33,674 INFO L87 Difference]: Start difference. First operand 690 states and 1142 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 23:45:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:33,834 INFO L93 Difference]: Finished difference Result 1389 states and 2300 transitions. [2024-11-23 23:45:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:45:33,835 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 23:45:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:33,845 INFO L225 Difference]: With dead ends: 1389 [2024-11-23 23:45:33,845 INFO L226 Difference]: Without dead ends: 711 [2024-11-23 23:45:33,849 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 23:45:33,851 INFO L435 NwaCegarLoop]: 1010 mSDtfsCounter, 100 mSDsluCounter, 4946 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 5956 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 23:45:33,852 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 5956 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2024-11-23 23:45:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 690. [2024-11-23 23:45:33,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 547 states have (on average 1.680073126142596) internal successors, (919), 567 states have internal predecessors, (919), 111 states have call successors, (111), 31 states have call predecessors, (111), 31 states have return successors, (112), 105 states have call predecessors, (112), 108 states have call successors, (112) [2024-11-23 23:45:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1142 transitions. [2024-11-23 23:45:33,898 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1142 transitions. Word has length 104 [2024-11-23 23:45:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:33,898 INFO L471 AbstractCegarLoop]: Abstraction has 690 states and 1142 transitions. [2024-11-23 23:45:33,898 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 23:45:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1142 transitions. [2024-11-23 23:45:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-23 23:45:33,900 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:33,901 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] [2024-11-23 23:45:33,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:45:34,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:34,101 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:34,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:34,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1051290871, now seen corresponding path program 1 times [2024-11-23 23:45:34,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:34,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153619078] [2024-11-23 23:45:34,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:34,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:34,211 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 23:45:34,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:34,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153619078] [2024-11-23 23:45:34,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153619078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:34,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921455614] [2024-11-23 23:45:34,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:34,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:34,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:34,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:34,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:45:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:34,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:45:34,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:45:34,564 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:34,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921455614] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:34,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:34,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:45:34,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804087839] [2024-11-23 23:45:34,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:34,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:45:34,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:34,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:45:34,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:45:34,566 INFO L87 Difference]: Start difference. First operand 690 states and 1142 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-23 23:45:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:34,709 INFO L93 Difference]: Finished difference Result 1383 states and 2290 transitions. [2024-11-23 23:45:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:45:34,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 88 [2024-11-23 23:45:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:34,717 INFO L225 Difference]: With dead ends: 1383 [2024-11-23 23:45:34,717 INFO L226 Difference]: Without dead ends: 701 [2024-11-23 23:45:34,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 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 23:45:34,721 INFO L435 NwaCegarLoop]: 1011 mSDtfsCounter, 12 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3024 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 23:45:34,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3024 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2024-11-23 23:45:34,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 699. [2024-11-23 23:45:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 555 states have (on average 1.672072072072072) internal successors, (928), 575 states have internal predecessors, (928), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2024-11-23 23:45:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1150 transitions. [2024-11-23 23:45:34,759 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1150 transitions. Word has length 88 [2024-11-23 23:45:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:34,759 INFO L471 AbstractCegarLoop]: Abstraction has 699 states and 1150 transitions. [2024-11-23 23:45:34,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-23 23:45:34,760 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1150 transitions. [2024-11-23 23:45:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-23 23:45:34,763 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:34,763 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] [2024-11-23 23:45:34,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 23:45:34,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:34,967 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:34,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:34,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1323552149, now seen corresponding path program 1 times [2024-11-23 23:45:34,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:34,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168344330] [2024-11-23 23:45:34,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:34,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:35,230 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 23:45:35,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168344330] [2024-11-23 23:45:35,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168344330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384396153] [2024-11-23 23:45:35,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:35,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:35,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:35,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:35,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:45:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:35,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:45:35,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:35,727 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 23:45:35,731 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:35,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384396153] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:35,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:35,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-11-23 23:45:35,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738163549] [2024-11-23 23:45:35,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:35,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:45:35,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:35,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:45:35,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:45:35,734 INFO L87 Difference]: Start difference. First operand 699 states and 1150 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 23:45:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:35,902 INFO L93 Difference]: Finished difference Result 1398 states and 2303 transitions. [2024-11-23 23:45:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:45:35,903 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 105 [2024-11-23 23:45:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:35,909 INFO L225 Difference]: With dead ends: 1398 [2024-11-23 23:45:35,910 INFO L226 Difference]: Without dead ends: 722 [2024-11-23 23:45:35,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 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 23:45:35,914 INFO L435 NwaCegarLoop]: 1010 mSDtfsCounter, 111 mSDsluCounter, 4934 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 5944 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 23:45:35,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 5944 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:35,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2024-11-23 23:45:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 699. [2024-11-23 23:45:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 555 states have (on average 1.672072072072072) internal successors, (928), 575 states have internal predecessors, (928), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2024-11-23 23:45:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1150 transitions. [2024-11-23 23:45:35,954 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1150 transitions. Word has length 105 [2024-11-23 23:45:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:35,955 INFO L471 AbstractCegarLoop]: Abstraction has 699 states and 1150 transitions. [2024-11-23 23:45:35,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 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 23:45:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1150 transitions. [2024-11-23 23:45:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-23 23:45:35,958 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:35,958 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 23:45:35,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:45:36,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:36,167 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:36,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1191419264, now seen corresponding path program 1 times [2024-11-23 23:45:36,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:36,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440247997] [2024-11-23 23:45:36,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:36,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:36,373 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 23:45:36,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:36,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440247997] [2024-11-23 23:45:36,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440247997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:36,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931849548] [2024-11-23 23:45:36,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:36,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:36,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:36,377 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:36,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:45:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:36,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:45:36,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:36,812 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 23:45:36,812 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:36,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931849548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:36,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:36,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-11-23 23:45:36,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197454771] [2024-11-23 23:45:36,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:36,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:45:36,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:36,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:45:36,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:45:36,818 INFO L87 Difference]: Start difference. First operand 699 states and 1150 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 23:45:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:37,065 INFO L93 Difference]: Finished difference Result 1401 states and 2307 transitions. [2024-11-23 23:45:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:45:37,066 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 23:45:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:37,073 INFO L225 Difference]: With dead ends: 1401 [2024-11-23 23:45:37,073 INFO L226 Difference]: Without dead ends: 725 [2024-11-23 23:45:37,076 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 23:45:37,077 INFO L435 NwaCegarLoop]: 1000 mSDtfsCounter, 95 mSDsluCounter, 5903 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 6903 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:37,078 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 6903 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:45:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2024-11-23 23:45:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 699. [2024-11-23 23:45:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 555 states have (on average 1.672072072072072) internal successors, (928), 575 states have internal predecessors, (928), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2024-11-23 23:45:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1150 transitions. [2024-11-23 23:45:37,135 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1150 transitions. Word has length 89 [2024-11-23 23:45:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:37,135 INFO L471 AbstractCegarLoop]: Abstraction has 699 states and 1150 transitions. [2024-11-23 23:45:37,136 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 23:45:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1150 transitions. [2024-11-23 23:45:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-23 23:45:37,140 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:37,140 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] [2024-11-23 23:45:37,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-23 23:45:37,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:37,341 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:37,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:37,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1627330934, now seen corresponding path program 1 times [2024-11-23 23:45:37,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:37,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766828520] [2024-11-23 23:45:37,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:37,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:37,584 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 23:45:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:37,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766828520] [2024-11-23 23:45:37,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766828520] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:37,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994365444] [2024-11-23 23:45:37,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:37,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:37,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:37,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:45:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:37,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:45:37,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:38,042 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 23:45:38,042 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:38,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994365444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:38,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:38,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-11-23 23:45:38,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537304397] [2024-11-23 23:45:38,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:38,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:45:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:38,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:45:38,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:45:38,044 INFO L87 Difference]: Start difference. First operand 699 states and 1150 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 23:45:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:38,298 INFO L93 Difference]: Finished difference Result 1401 states and 2307 transitions. [2024-11-23 23:45:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:45:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 106 [2024-11-23 23:45:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:38,305 INFO L225 Difference]: With dead ends: 1401 [2024-11-23 23:45:38,306 INFO L226 Difference]: Without dead ends: 725 [2024-11-23 23:45:38,309 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 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 23:45:38,310 INFO L435 NwaCegarLoop]: 1000 mSDtfsCounter, 105 mSDsluCounter, 5891 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6891 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 23:45:38,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 6891 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2024-11-23 23:45:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 699. [2024-11-23 23:45:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 555 states have (on average 1.672072072072072) internal successors, (928), 575 states have internal predecessors, (928), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2024-11-23 23:45:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1150 transitions. [2024-11-23 23:45:38,345 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1150 transitions. Word has length 106 [2024-11-23 23:45:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:38,345 INFO L471 AbstractCegarLoop]: Abstraction has 699 states and 1150 transitions. [2024-11-23 23:45:38,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 23:45:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1150 transitions. [2024-11-23 23:45:38,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-23 23:45:38,348 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:38,348 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] [2024-11-23 23:45:38,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-23 23:45:38,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-23 23:45:38,549 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:38,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:38,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1219832101, now seen corresponding path program 1 times [2024-11-23 23:45:38,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:38,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594841697] [2024-11-23 23:45:38,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:38,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:38,720 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 23:45:38,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:38,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594841697] [2024-11-23 23:45:38,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594841697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:38,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184826504] [2024-11-23 23:45:38,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:38,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:38,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:38,723 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:38,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:45:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:39,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:45:39,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:39,141 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 23:45:39,142 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:39,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184826504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:39,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:39,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-11-23 23:45:39,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917579566] [2024-11-23 23:45:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:39,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:45:39,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:39,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:45:39,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:45:39,144 INFO L87 Difference]: Start difference. First operand 699 states and 1150 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 23:45:39,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:39,364 INFO L93 Difference]: Finished difference Result 1392 states and 2292 transitions. [2024-11-23 23:45:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:45:39,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 91 [2024-11-23 23:45:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:39,371 INFO L225 Difference]: With dead ends: 1392 [2024-11-23 23:45:39,372 INFO L226 Difference]: Without dead ends: 716 [2024-11-23 23:45:39,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 86 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 23:45:39,376 INFO L435 NwaCegarLoop]: 1000 mSDtfsCounter, 115 mSDsluCounter, 5879 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 6879 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 23:45:39,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 6879 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2024-11-23 23:45:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 699. [2024-11-23 23:45:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 555 states have (on average 1.672072072072072) internal successors, (928), 575 states have internal predecessors, (928), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2024-11-23 23:45:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1150 transitions. [2024-11-23 23:45:39,409 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1150 transitions. Word has length 91 [2024-11-23 23:45:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:39,410 INFO L471 AbstractCegarLoop]: Abstraction has 699 states and 1150 transitions. [2024-11-23 23:45:39,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 23:45:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1150 transitions. [2024-11-23 23:45:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-23 23:45:39,412 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:39,413 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] [2024-11-23 23:45:39,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-23 23:45:39,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:39,613 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:39,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:39,614 INFO L85 PathProgramCache]: Analyzing trace with hash -114700390, now seen corresponding path program 1 times [2024-11-23 23:45:39,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:39,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268415291] [2024-11-23 23:45:39,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:39,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:39,727 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 23:45:39,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:39,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268415291] [2024-11-23 23:45:39,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268415291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:39,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963565008] [2024-11-23 23:45:39,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:39,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:39,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:39,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:39,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:45:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:40,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 1510 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:45:40,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:45:40,128 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963565008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:40,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:40,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:45:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517371178] [2024-11-23 23:45:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:40,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:45:40,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:40,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:45:40,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:45:40,131 INFO L87 Difference]: Start difference. First operand 699 states and 1150 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 23:45:40,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:40,226 INFO L93 Difference]: Finished difference Result 1364 states and 2252 transitions. [2024-11-23 23:45:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:45:40,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 107 [2024-11-23 23:45:40,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:40,233 INFO L225 Difference]: With dead ends: 1364 [2024-11-23 23:45:40,233 INFO L226 Difference]: Without dead ends: 699 [2024-11-23 23:45:40,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 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 23:45:40,237 INFO L435 NwaCegarLoop]: 1008 mSDtfsCounter, 20 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3018 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 23:45:40,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 3018 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:45:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2024-11-23 23:45:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 699. [2024-11-23 23:45:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 555 states have (on average 1.6630630630630632) internal successors, (923), 575 states have internal predecessors, (923), 111 states have call successors, (111), 32 states have call predecessors, (111), 32 states have return successors, (111), 105 states have call predecessors, (111), 108 states have call successors, (111) [2024-11-23 23:45:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1145 transitions. [2024-11-23 23:45:40,285 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1145 transitions. Word has length 107 [2024-11-23 23:45:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:40,286 INFO L471 AbstractCegarLoop]: Abstraction has 699 states and 1145 transitions. [2024-11-23 23:45:40,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 23:45:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1145 transitions. [2024-11-23 23:45:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-23 23:45:40,289 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:40,289 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] [2024-11-23 23:45:40,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:45:40,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-23 23:45:40,490 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:40,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:40,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1347093121, now seen corresponding path program 1 times [2024-11-23 23:45:40,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:40,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721467207] [2024-11-23 23:45:40,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:40,598 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 23:45:40,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:40,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721467207] [2024-11-23 23:45:40,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721467207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:40,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667773697] [2024-11-23 23:45:40,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:40,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:40,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:40,603 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:40,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:45:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:40,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:45:40,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-23 23:45:40,987 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:40,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667773697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:40,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:40,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:45:40,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718871460] [2024-11-23 23:45:40,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:40,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:45:40,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:40,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:45:40,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:45:40,989 INFO L87 Difference]: Start difference. First operand 699 states and 1145 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, (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 23:45:41,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:41,210 INFO L93 Difference]: Finished difference Result 1393 states and 2292 transitions. [2024-11-23 23:45:41,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:45:41,211 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, (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 108 [2024-11-23 23:45:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:41,218 INFO L225 Difference]: With dead ends: 1393 [2024-11-23 23:45:41,219 INFO L226 Difference]: Without dead ends: 786 [2024-11-23 23:45:41,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 108 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 23:45:41,222 INFO L435 NwaCegarLoop]: 973 mSDtfsCounter, 171 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 2890 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 23:45:41,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 2890 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:45:41,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2024-11-23 23:45:41,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 744. [2024-11-23 23:45:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 599 states have (on average 1.681135225375626) internal successors, (1007), 619 states have internal predecessors, (1007), 111 states have call successors, (111), 33 states have call predecessors, (111), 33 states have return successors, (110), 105 states have call predecessors, (110), 108 states have call successors, (110) [2024-11-23 23:45:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1228 transitions. [2024-11-23 23:45:41,256 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1228 transitions. Word has length 108 [2024-11-23 23:45:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:41,256 INFO L471 AbstractCegarLoop]: Abstraction has 744 states and 1228 transitions. [2024-11-23 23:45:41,257 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, (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 23:45:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1228 transitions. [2024-11-23 23:45:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-23 23:45:41,259 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:41,260 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] [2024-11-23 23:45:41,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 23:45:41,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-23 23:45:41,464 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:41,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:41,465 INFO L85 PathProgramCache]: Analyzing trace with hash -996182235, now seen corresponding path program 1 times [2024-11-23 23:45:41,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:41,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899330789] [2024-11-23 23:45:41,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:41,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:41,575 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 23:45:41,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:41,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899330789] [2024-11-23 23:45:41,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899330789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:41,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215455548] [2024-11-23 23:45:41,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:41,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:41,579 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:41,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:45:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:41,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:45:41,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-23 23:45:41,953 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:41,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215455548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:41,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:41,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2024-11-23 23:45:41,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468100333] [2024-11-23 23:45:41,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:41,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:45:41,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:41,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:45:41,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:45:41,955 INFO L87 Difference]: Start difference. First operand 744 states and 1228 transitions. Second operand has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:45:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:42,083 INFO L93 Difference]: Finished difference Result 1386 states and 2279 transitions. [2024-11-23 23:45:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:45:42,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 93 [2024-11-23 23:45:42,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:42,090 INFO L225 Difference]: With dead ends: 1386 [2024-11-23 23:45:42,090 INFO L226 Difference]: Without dead ends: 779 [2024-11-23 23:45:42,093 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 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 23:45:42,094 INFO L435 NwaCegarLoop]: 1011 mSDtfsCounter, 89 mSDsluCounter, 4966 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 5977 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 23:45:42,094 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 5977 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2024-11-23 23:45:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 757. [2024-11-23 23:45:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 609 states have (on average 1.6781609195402298) internal successors, (1022), 631 states have internal predecessors, (1022), 112 states have call successors, (112), 33 states have call predecessors, (112), 35 states have return successors, (113), 106 states have call predecessors, (113), 109 states have call successors, (113) [2024-11-23 23:45:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1247 transitions. [2024-11-23 23:45:42,129 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1247 transitions. Word has length 93 [2024-11-23 23:45:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:42,130 INFO L471 AbstractCegarLoop]: Abstraction has 757 states and 1247 transitions. [2024-11-23 23:45:42,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:45:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1247 transitions. [2024-11-23 23:45:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-23 23:45:42,133 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:42,133 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, 1, 1, 1, 1, 1] [2024-11-23 23:45:42,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-23 23:45:42,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-23 23:45:42,334 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:42,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1376753456, now seen corresponding path program 1 times [2024-11-23 23:45:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:42,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882167173] [2024-11-23 23:45:42,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:42,421 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 23:45:42,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:42,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882167173] [2024-11-23 23:45:42,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882167173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:42,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393006820] [2024-11-23 23:45:42,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:42,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:42,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:42,424 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:42,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 23:45:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:42,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:45:42,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-23 23:45:42,810 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:42,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393006820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:42,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:42,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2024-11-23 23:45:42,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667836995] [2024-11-23 23:45:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:42,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:45:42,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:42,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:45:42,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:45:42,814 INFO L87 Difference]: Start difference. First operand 757 states and 1247 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, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:45:42,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:42,950 INFO L93 Difference]: Finished difference Result 1395 states and 2293 transitions. [2024-11-23 23:45:42,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:45:42,951 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, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2024-11-23 23:45:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:42,958 INFO L225 Difference]: With dead ends: 1395 [2024-11-23 23:45:42,958 INFO L226 Difference]: Without dead ends: 788 [2024-11-23 23:45:42,962 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 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 23:45:42,963 INFO L435 NwaCegarLoop]: 1011 mSDtfsCounter, 100 mSDsluCounter, 4954 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 5965 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 23:45:42,963 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 5965 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2024-11-23 23:45:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 757. [2024-11-23 23:45:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 609 states have (on average 1.6781609195402298) internal successors, (1022), 631 states have internal predecessors, (1022), 112 states have call successors, (112), 33 states have call predecessors, (112), 35 states have return successors, (113), 106 states have call predecessors, (113), 109 states have call successors, (113) [2024-11-23 23:45:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1247 transitions. [2024-11-23 23:45:42,998 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1247 transitions. Word has length 94 [2024-11-23 23:45:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:42,998 INFO L471 AbstractCegarLoop]: Abstraction has 757 states and 1247 transitions. [2024-11-23 23:45:42,999 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, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:45:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1247 transitions. [2024-11-23 23:45:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-23 23:45:43,001 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:43,001 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, 1, 1, 1, 1, 1] [2024-11-23 23:45:43,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 23:45:43,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-23 23:45:43,203 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:43,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:43,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1870359632, now seen corresponding path program 1 times [2024-11-23 23:45:43,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:43,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432291816] [2024-11-23 23:45:43,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:43,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:43,281 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 23:45:43,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:43,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432291816] [2024-11-23 23:45:43,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432291816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:43,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592801742] [2024-11-23 23:45:43,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:43,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:43,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:43,285 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 23:45:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:43,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:45:43,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-23 23:45:43,711 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:43,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592801742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:43,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:43,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2024-11-23 23:45:43,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089014523] [2024-11-23 23:45:43,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:43,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:45:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:43,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:45:43,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:45:43,714 INFO L87 Difference]: Start difference. First operand 757 states and 1247 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:45:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:43,945 INFO L93 Difference]: Finished difference Result 1398 states and 2296 transitions. [2024-11-23 23:45:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:45:43,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2024-11-23 23:45:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:43,953 INFO L225 Difference]: With dead ends: 1398 [2024-11-23 23:45:43,953 INFO L226 Difference]: Without dead ends: 791 [2024-11-23 23:45:43,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 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 23:45:43,960 INFO L435 NwaCegarLoop]: 1001 mSDtfsCounter, 96 mSDsluCounter, 5912 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 6913 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 23:45:43,961 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 6913 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2024-11-23 23:45:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 757. [2024-11-23 23:45:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 609 states have (on average 1.6781609195402298) internal successors, (1022), 631 states have internal predecessors, (1022), 112 states have call successors, (112), 33 states have call predecessors, (112), 35 states have return successors, (113), 106 states have call predecessors, (113), 109 states have call successors, (113) [2024-11-23 23:45:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1247 transitions. [2024-11-23 23:45:44,009 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1247 transitions. Word has length 94 [2024-11-23 23:45:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:44,010 INFO L471 AbstractCegarLoop]: Abstraction has 757 states and 1247 transitions. [2024-11-23 23:45:44,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:45:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1247 transitions. [2024-11-23 23:45:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-23 23:45:44,013 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:44,013 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] [2024-11-23 23:45:44,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 23:45:44,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 23:45:44,217 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:44,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:44,218 INFO L85 PathProgramCache]: Analyzing trace with hash 922293960, now seen corresponding path program 1 times [2024-11-23 23:45:44,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:44,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808540210] [2024-11-23 23:45:44,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:44,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:45:44,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:44,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808540210] [2024-11-23 23:45:44,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808540210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:44,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125378085] [2024-11-23 23:45:44,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:44,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:44,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:44,317 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:44,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 23:45:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:44,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 23:45:44,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:45:44,662 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:44,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125378085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:44,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:44,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:45:44,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299590103] [2024-11-23 23:45:44,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:44,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:45:44,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:44,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:45:44,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:45:44,664 INFO L87 Difference]: Start difference. First operand 757 states and 1247 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 23:45:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:44,722 INFO L93 Difference]: Finished difference Result 1440 states and 2375 transitions. [2024-11-23 23:45:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:45:44,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 94 [2024-11-23 23:45:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:44,729 INFO L225 Difference]: With dead ends: 1440 [2024-11-23 23:45:44,729 INFO L226 Difference]: Without dead ends: 757 [2024-11-23 23:45:44,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 93 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 23:45:44,735 INFO L435 NwaCegarLoop]: 1012 mSDtfsCounter, 2 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3027 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 23:45:44,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3027 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:45:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2024-11-23 23:45:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 757. [2024-11-23 23:45:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 609 states have (on average 1.6732348111658457) internal successors, (1019), 631 states have internal predecessors, (1019), 112 states have call successors, (112), 33 states have call predecessors, (112), 35 states have return successors, (113), 106 states have call predecessors, (113), 109 states have call successors, (113) [2024-11-23 23:45:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1244 transitions. [2024-11-23 23:45:44,770 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1244 transitions. Word has length 94 [2024-11-23 23:45:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:44,770 INFO L471 AbstractCegarLoop]: Abstraction has 757 states and 1244 transitions. [2024-11-23 23:45:44,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 23:45:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1244 transitions. [2024-11-23 23:45:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-23 23:45:44,772 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:44,773 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] [2024-11-23 23:45:44,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 23:45:44,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-23 23:45:44,974 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:44,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash 478384551, now seen corresponding path program 1 times [2024-11-23 23:45:44,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:44,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666598615] [2024-11-23 23:45:44,974 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:45,067 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 23:45:45,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:45,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666598615] [2024-11-23 23:45:45,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666598615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:45,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975497601] [2024-11-23 23:45:45,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:45,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:45,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:45,070 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:45,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 23:45:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:45,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 23:45:45,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-23 23:45:45,457 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:45,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975497601] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:45,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:45,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2024-11-23 23:45:45,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234380237] [2024-11-23 23:45:45,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:45,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:45:45,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:45,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:45:45,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:45:45,459 INFO L87 Difference]: Start difference. First operand 757 states and 1244 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:45:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:45,654 INFO L93 Difference]: Finished difference Result 1389 states and 2279 transitions. [2024-11-23 23:45:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:45:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 95 [2024-11-23 23:45:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:45,661 INFO L225 Difference]: With dead ends: 1389 [2024-11-23 23:45:45,661 INFO L226 Difference]: Without dead ends: 782 [2024-11-23 23:45:45,665 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 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 23:45:45,665 INFO L435 NwaCegarLoop]: 998 mSDtfsCounter, 106 mSDsluCounter, 5885 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 6883 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 23:45:45,666 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 6883 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:45:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2024-11-23 23:45:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 757. [2024-11-23 23:45:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 609 states have (on average 1.6732348111658457) internal successors, (1019), 631 states have internal predecessors, (1019), 112 states have call successors, (112), 33 states have call predecessors, (112), 35 states have return successors, (113), 106 states have call predecessors, (113), 109 states have call successors, (113) [2024-11-23 23:45:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1244 transitions. [2024-11-23 23:45:45,698 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1244 transitions. Word has length 95 [2024-11-23 23:45:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:45,699 INFO L471 AbstractCegarLoop]: Abstraction has 757 states and 1244 transitions. [2024-11-23 23:45:45,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 3 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-23 23:45:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1244 transitions. [2024-11-23 23:45:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-23 23:45:45,701 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:45,702 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, 1] [2024-11-23 23:45:45,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-23 23:45:45,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 23:45:45,903 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:45,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1562808812, now seen corresponding path program 1 times [2024-11-23 23:45:45,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:45,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194840079] [2024-11-23 23:45:45,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:45,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:45,998 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 23:45:45,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:45,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194840079] [2024-11-23 23:45:45,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194840079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:45,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871571848] [2024-11-23 23:45:45,998 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:45,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:45,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:46,001 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:46,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 23:45:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:46,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:45:46,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 23:45:46,735 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:46,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871571848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:46,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:46,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2024-11-23 23:45:46,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538870468] [2024-11-23 23:45:46,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:46,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:45:46,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:46,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:45:46,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:45:46,737 INFO L87 Difference]: Start difference. First operand 757 states and 1244 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-23 23:45:51,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:51,618 INFO L93 Difference]: Finished difference Result 2615 states and 4338 transitions. [2024-11-23 23:45:51,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:45:51,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2024-11-23 23:45:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:51,637 INFO L225 Difference]: With dead ends: 2615 [2024-11-23 23:45:51,637 INFO L226 Difference]: Without dead ends: 2012 [2024-11-23 23:45:51,640 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:45:51,641 INFO L435 NwaCegarLoop]: 568 mSDtfsCounter, 4554 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 3824 mSolverCounterSat, 801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4765 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 4625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 801 IncrementalHoareTripleChecker+Valid, 3824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:51,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4765 Valid, 1380 Invalid, 4625 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [801 Valid, 3824 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-23 23:45:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2024-11-23 23:45:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1845. [2024-11-23 23:45:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1473 states have (on average 1.6653088934147997) internal successors, (2453), 1511 states have internal predecessors, (2453), 293 states have call successors, (293), 75 states have call predecessors, (293), 78 states have return successors, (314), 273 states have call predecessors, (314), 289 states have call successors, (314) [2024-11-23 23:45:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 3060 transitions. [2024-11-23 23:45:51,766 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 3060 transitions. Word has length 112 [2024-11-23 23:45:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:51,767 INFO L471 AbstractCegarLoop]: Abstraction has 1845 states and 3060 transitions. [2024-11-23 23:45:51,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 3 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-23 23:45:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 3060 transitions. [2024-11-23 23:45:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-23 23:45:51,773 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:51,773 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:45:51,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 23:45:51,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 23:45:51,974 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:51,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1039493726, now seen corresponding path program 1 times [2024-11-23 23:45:51,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:51,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861047511] [2024-11-23 23:45:51,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:51,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-23 23:45:52,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861047511] [2024-11-23 23:45:52,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861047511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:52,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592692002] [2024-11-23 23:45:52,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:52,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:52,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:52,112 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:52,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 23:45:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:52,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 1635 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:45:52,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:45:52,620 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:52,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592692002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:52,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:52,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 23:45:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594083008] [2024-11-23 23:45:52,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:52,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:45:52,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:52,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:45:52,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:45:52,623 INFO L87 Difference]: Start difference. First operand 1845 states and 3060 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:45:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:53,309 INFO L93 Difference]: Finished difference Result 3560 states and 6004 transitions. [2024-11-23 23:45:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:45:53,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 151 [2024-11-23 23:45:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:53,321 INFO L225 Difference]: With dead ends: 3560 [2024-11-23 23:45:53,322 INFO L226 Difference]: Without dead ends: 1869 [2024-11-23 23:45:53,330 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:45:53,331 INFO L435 NwaCegarLoop]: 1002 mSDtfsCounter, 958 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:53,331 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 2578 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-23 23:45:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2024-11-23 23:45:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1869. [2024-11-23 23:45:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1494 states have (on average 1.6659973226238287) internal successors, (2489), 1532 states have internal predecessors, (2489), 293 states have call successors, (293), 78 states have call predecessors, (293), 81 states have return successors, (317), 273 states have call predecessors, (317), 289 states have call successors, (317) [2024-11-23 23:45:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 3099 transitions. [2024-11-23 23:45:53,486 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 3099 transitions. Word has length 151 [2024-11-23 23:45:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:53,486 INFO L471 AbstractCegarLoop]: Abstraction has 1869 states and 3099 transitions. [2024-11-23 23:45:53,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:45:53,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 3099 transitions. [2024-11-23 23:45:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-23 23:45:53,503 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:53,503 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:45:53,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-23 23:45:53,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 23:45:53,704 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:53,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:53,704 INFO L85 PathProgramCache]: Analyzing trace with hash -239509108, now seen corresponding path program 1 times [2024-11-23 23:45:53,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:53,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816905774] [2024-11-23 23:45:53,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:53,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 23:45:53,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:53,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816905774] [2024-11-23 23:45:53,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816905774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:53,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223697724] [2024-11-23 23:45:53,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:53,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:53,856 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:53,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 23:45:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:54,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:45:54,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:45:54,375 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:54,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223697724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:54,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:54,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 23:45:54,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991078904] [2024-11-23 23:45:54,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:54,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:45:54,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:54,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:45:54,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:45:54,377 INFO L87 Difference]: Start difference. First operand 1869 states and 3099 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:45:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:55,185 INFO L93 Difference]: Finished difference Result 3608 states and 6072 transitions. [2024-11-23 23:45:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:45:55,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 153 [2024-11-23 23:45:55,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:55,199 INFO L225 Difference]: With dead ends: 3608 [2024-11-23 23:45:55,199 INFO L226 Difference]: Without dead ends: 1893 [2024-11-23 23:45:55,208 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:45:55,208 INFO L435 NwaCegarLoop]: 999 mSDtfsCounter, 949 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:55,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 2575 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:45:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2024-11-23 23:45:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1893. [2024-11-23 23:45:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1515 states have (on average 1.6666666666666667) internal successors, (2525), 1553 states have internal predecessors, (2525), 293 states have call successors, (293), 81 states have call predecessors, (293), 84 states have return successors, (320), 273 states have call predecessors, (320), 289 states have call successors, (320) [2024-11-23 23:45:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3138 transitions. [2024-11-23 23:45:55,315 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3138 transitions. Word has length 153 [2024-11-23 23:45:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:55,316 INFO L471 AbstractCegarLoop]: Abstraction has 1893 states and 3138 transitions. [2024-11-23 23:45:55,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:45:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3138 transitions. [2024-11-23 23:45:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-23 23:45:55,322 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:55,322 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 23:45:55,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-23 23:45:55,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:55,523 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:55,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:55,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1552305632, now seen corresponding path program 1 times [2024-11-23 23:45:55,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:55,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614981725] [2024-11-23 23:45:55,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:55,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-23 23:45:55,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:55,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614981725] [2024-11-23 23:45:55,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614981725] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:55,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791844851] [2024-11-23 23:45:55,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:55,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:55,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:55,631 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:55,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 23:45:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:55,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:45:55,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:45:56,119 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:56,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791844851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:56,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:56,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 23:45:56,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996440013] [2024-11-23 23:45:56,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:56,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:45:56,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:56,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:45:56,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:45:56,121 INFO L87 Difference]: Start difference. First operand 1893 states and 3138 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-23 23:45:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:56,297 INFO L93 Difference]: Finished difference Result 4559 states and 7552 transitions. [2024-11-23 23:45:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:45:56,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 154 [2024-11-23 23:45:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:56,317 INFO L225 Difference]: With dead ends: 4559 [2024-11-23 23:45:56,317 INFO L226 Difference]: Without dead ends: 2820 [2024-11-23 23:45:56,326 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-23 23:45:56,327 INFO L435 NwaCegarLoop]: 1358 mSDtfsCounter, 966 mSDsluCounter, 3303 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 4661 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:56,327 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 4661 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:45:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2024-11-23 23:45:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2816. [2024-11-23 23:45:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2260 states have (on average 1.6469026548672567) internal successors, (3722), 2299 states have internal predecessors, (3722), 423 states have call successors, (423), 130 states have call predecessors, (423), 132 states have return successors, (492), 401 states have call predecessors, (492), 417 states have call successors, (492) [2024-11-23 23:45:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4637 transitions. [2024-11-23 23:45:56,499 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4637 transitions. Word has length 154 [2024-11-23 23:45:56,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:56,500 INFO L471 AbstractCegarLoop]: Abstraction has 2816 states and 4637 transitions. [2024-11-23 23:45:56,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-23 23:45:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4637 transitions. [2024-11-23 23:45:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-23 23:45:56,508 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:56,509 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:45:56,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-23 23:45:56,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:56,710 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:56,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1549520864, now seen corresponding path program 1 times [2024-11-23 23:45:56,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:56,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438762033] [2024-11-23 23:45:56,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:56,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-23 23:45:56,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:56,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438762033] [2024-11-23 23:45:56,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438762033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:56,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460140796] [2024-11-23 23:45:56,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:56,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:56,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:56,824 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:56,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-23 23:45:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:57,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 1636 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:45:57,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:45:57,384 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:57,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460140796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:57,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:57,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 23:45:57,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238065394] [2024-11-23 23:45:57,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:57,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:45:57,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:57,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:45:57,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:45:57,386 INFO L87 Difference]: Start difference. First operand 2816 states and 4637 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:45:58,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:45:58,161 INFO L93 Difference]: Finished difference Result 5526 states and 9253 transitions. [2024-11-23 23:45:58,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:45:58,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 155 [2024-11-23 23:45:58,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:45:58,183 INFO L225 Difference]: With dead ends: 5526 [2024-11-23 23:45:58,183 INFO L226 Difference]: Without dead ends: 2864 [2024-11-23 23:45:58,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:45:58,198 INFO L435 NwaCegarLoop]: 996 mSDtfsCounter, 940 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 2572 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:45:58,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 2572 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-23 23:45:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2024-11-23 23:45:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2864. [2024-11-23 23:45:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2302 states have (on average 1.6481320590790618) internal successors, (3794), 2341 states have internal predecessors, (3794), 423 states have call successors, (423), 136 states have call predecessors, (423), 138 states have return successors, (497), 401 states have call predecessors, (497), 417 states have call successors, (497) [2024-11-23 23:45:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4714 transitions. [2024-11-23 23:45:58,402 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4714 transitions. Word has length 155 [2024-11-23 23:45:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:45:58,402 INFO L471 AbstractCegarLoop]: Abstraction has 2864 states and 4714 transitions. [2024-11-23 23:45:58,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:45:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4714 transitions. [2024-11-23 23:45:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-23 23:45:58,411 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:45:58,411 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:45:58,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-23 23:45:58,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:58,612 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:45:58,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:45:58,612 INFO L85 PathProgramCache]: Analyzing trace with hash -210011370, now seen corresponding path program 1 times [2024-11-23 23:45:58,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:45:58,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442157449] [2024-11-23 23:45:58,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:58,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:45:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-23 23:45:58,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:45:58,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442157449] [2024-11-23 23:45:58,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442157449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:45:58,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598777632] [2024-11-23 23:45:58,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:45:58,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:45:58,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:45:58,754 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:45:58,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 23:45:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:45:59,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 23:45:59,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:45:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:45:59,291 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:45:59,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598777632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:45:59,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:45:59,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-23 23:45:59,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279608121] [2024-11-23 23:45:59,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:45:59,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:45:59,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:45:59,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:45:59,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:45:59,293 INFO L87 Difference]: Start difference. First operand 2864 states and 4714 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:46:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:00,040 INFO L93 Difference]: Finished difference Result 5622 states and 9389 transitions. [2024-11-23 23:46:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:46:00,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 157 [2024-11-23 23:46:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:00,058 INFO L225 Difference]: With dead ends: 5622 [2024-11-23 23:46:00,058 INFO L226 Difference]: Without dead ends: 2912 [2024-11-23 23:46:00,069 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:46:00,071 INFO L435 NwaCegarLoop]: 993 mSDtfsCounter, 932 mSDsluCounter, 1576 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:00,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [945 Valid, 2569 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-23 23:46:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2024-11-23 23:46:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2912. [2024-11-23 23:46:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2344 states have (on average 1.6493174061433447) internal successors, (3866), 2383 states have internal predecessors, (3866), 423 states have call successors, (423), 142 states have call predecessors, (423), 144 states have return successors, (502), 401 states have call predecessors, (502), 417 states have call successors, (502) [2024-11-23 23:46:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 4791 transitions. [2024-11-23 23:46:00,205 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 4791 transitions. Word has length 157 [2024-11-23 23:46:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:00,206 INFO L471 AbstractCegarLoop]: Abstraction has 2912 states and 4791 transitions. [2024-11-23 23:46:00,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:46:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 4791 transitions. [2024-11-23 23:46:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-23 23:46:00,213 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:00,213 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:00,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-23 23:46:00,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:00,418 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:00,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:00,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2116975840, now seen corresponding path program 1 times [2024-11-23 23:46:00,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:00,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884736442] [2024-11-23 23:46:00,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:00,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:46:00,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:00,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884736442] [2024-11-23 23:46:00,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884736442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:00,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009438029] [2024-11-23 23:46:00,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:00,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:00,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:00,527 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:00,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 23:46:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:00,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:46:00,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-23 23:46:00,943 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:00,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009438029] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:00,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:00,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-11-23 23:46:00,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443785491] [2024-11-23 23:46:00,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:00,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:46:00,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:00,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:46:00,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:46:00,946 INFO L87 Difference]: Start difference. First operand 2912 states and 4791 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-23 23:46:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:01,124 INFO L93 Difference]: Finished difference Result 5801 states and 9562 transitions. [2024-11-23 23:46:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:46:01,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) Word has length 159 [2024-11-23 23:46:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:01,147 INFO L225 Difference]: With dead ends: 5801 [2024-11-23 23:46:01,147 INFO L226 Difference]: Without dead ends: 2877 [2024-11-23 23:46:01,157 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 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 23:46:01,158 INFO L435 NwaCegarLoop]: 1009 mSDtfsCounter, 7 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 3019 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:01,158 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 3019 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:46:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2024-11-23 23:46:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2877. [2024-11-23 23:46:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2312 states have (on average 1.6423010380622838) internal successors, (3797), 2349 states have internal predecessors, (3797), 422 states have call successors, (422), 142 states have call predecessors, (422), 142 states have return successors, (499), 400 states have call predecessors, (499), 416 states have call successors, (499) [2024-11-23 23:46:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 4718 transitions. [2024-11-23 23:46:01,287 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 4718 transitions. Word has length 159 [2024-11-23 23:46:01,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:01,287 INFO L471 AbstractCegarLoop]: Abstraction has 2877 states and 4718 transitions. [2024-11-23 23:46:01,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 1 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-23 23:46:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 4718 transitions. [2024-11-23 23:46:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-23 23:46:01,294 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:01,294 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:46:01,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-23 23:46:01,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:01,495 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:01,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:01,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1209975233, now seen corresponding path program 1 times [2024-11-23 23:46:01,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:01,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89051657] [2024-11-23 23:46:01,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:01,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-23 23:46:01,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:01,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89051657] [2024-11-23 23:46:01,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89051657] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:01,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999135123] [2024-11-23 23:46:01,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:01,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:01,679 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:01,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-23 23:46:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:02,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 23:46:02,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-23 23:46:02,145 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:02,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999135123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:02,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:02,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2024-11-23 23:46:02,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720287353] [2024-11-23 23:46:02,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:02,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:46:02,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:02,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:46:02,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:46:02,147 INFO L87 Difference]: Start difference. First operand 2877 states and 4718 transitions. Second operand has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-23 23:46:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:02,346 INFO L93 Difference]: Finished difference Result 5778 states and 9472 transitions. [2024-11-23 23:46:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:46:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 160 [2024-11-23 23:46:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:02,366 INFO L225 Difference]: With dead ends: 5778 [2024-11-23 23:46:02,366 INFO L226 Difference]: Without dead ends: 2918 [2024-11-23 23:46:02,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 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 23:46:02,378 INFO L435 NwaCegarLoop]: 1019 mSDtfsCounter, 122 mSDsluCounter, 4956 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 5975 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:02,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 5975 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:46:02,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2024-11-23 23:46:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2870. [2024-11-23 23:46:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2305 states have (on average 1.640347071583514) internal successors, (3781), 2342 states have internal predecessors, (3781), 422 states have call successors, (422), 142 states have call predecessors, (422), 142 states have return successors, (499), 400 states have call predecessors, (499), 416 states have call successors, (499) [2024-11-23 23:46:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 4702 transitions. [2024-11-23 23:46:02,509 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 4702 transitions. Word has length 160 [2024-11-23 23:46:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:02,510 INFO L471 AbstractCegarLoop]: Abstraction has 2870 states and 4702 transitions. [2024-11-23 23:46:02,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-23 23:46:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 4702 transitions. [2024-11-23 23:46:02,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-23 23:46:02,518 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:02,518 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 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 23:46:02,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-23 23:46:02,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-23 23:46:02,723 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:02,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1265402498, now seen corresponding path program 1 times [2024-11-23 23:46:02,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:02,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279919612] [2024-11-23 23:46:02,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:02,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-23 23:46:02,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:02,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279919612] [2024-11-23 23:46:02,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279919612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:02,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:46:02,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 23:46:02,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258532661] [2024-11-23 23:46:02,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:02,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:46:02,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:02,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:46:02,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:46:02,927 INFO L87 Difference]: Start difference. First operand 2870 states and 4702 transitions. Second operand has 7 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-23 23:46:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:03,182 INFO L93 Difference]: Finished difference Result 5682 states and 9320 transitions. [2024-11-23 23:46:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:46:03,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 161 [2024-11-23 23:46:03,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:03,205 INFO L225 Difference]: With dead ends: 5682 [2024-11-23 23:46:03,206 INFO L226 Difference]: Without dead ends: 2920 [2024-11-23 23:46:03,219 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 23:46:03,219 INFO L435 NwaCegarLoop]: 1007 mSDtfsCounter, 126 mSDsluCounter, 4912 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 5919 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 23:46:03,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 5919 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:46:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2024-11-23 23:46:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 2870. [2024-11-23 23:46:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2305 states have (on average 1.640347071583514) internal successors, (3781), 2342 states have internal predecessors, (3781), 422 states have call successors, (422), 142 states have call predecessors, (422), 142 states have return successors, (499), 400 states have call predecessors, (499), 416 states have call successors, (499) [2024-11-23 23:46:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 4702 transitions. [2024-11-23 23:46:03,348 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 4702 transitions. Word has length 161 [2024-11-23 23:46:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:03,349 INFO L471 AbstractCegarLoop]: Abstraction has 2870 states and 4702 transitions. [2024-11-23 23:46:03,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2024-11-23 23:46:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 4702 transitions. [2024-11-23 23:46:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-23 23:46:03,355 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:03,355 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:03,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-23 23:46:03,355 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:03,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:03,356 INFO L85 PathProgramCache]: Analyzing trace with hash 872129812, now seen corresponding path program 1 times [2024-11-23 23:46:03,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:03,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163226389] [2024-11-23 23:46:03,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:03,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:46:03,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:03,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163226389] [2024-11-23 23:46:03,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163226389] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:03,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:46:03,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:46:03,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673304898] [2024-11-23 23:46:03,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:03,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:46:03,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:03,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:46:03,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:46:03,468 INFO L87 Difference]: Start difference. First operand 2870 states and 4702 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-23 23:46:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:03,634 INFO L93 Difference]: Finished difference Result 5695 states and 9347 transitions. [2024-11-23 23:46:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:46:03,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 161 [2024-11-23 23:46:03,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:03,660 INFO L225 Difference]: With dead ends: 5695 [2024-11-23 23:46:03,661 INFO L226 Difference]: Without dead ends: 2828 [2024-11-23 23:46:03,669 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 23:46:03,670 INFO L435 NwaCegarLoop]: 1008 mSDtfsCounter, 8 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3018 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 23:46:03,671 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 3018 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:46:03,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2024-11-23 23:46:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2828. [2024-11-23 23:46:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2266 states have (on average 1.6363636363636365) internal successors, (3708), 2301 states have internal predecessors, (3708), 421 states have call successors, (421), 142 states have call predecessors, (421), 140 states have return successors, (496), 399 states have call predecessors, (496), 415 states have call successors, (496) [2024-11-23 23:46:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 4625 transitions. [2024-11-23 23:46:03,789 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 4625 transitions. Word has length 161 [2024-11-23 23:46:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:03,789 INFO L471 AbstractCegarLoop]: Abstraction has 2828 states and 4625 transitions. [2024-11-23 23:46:03,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-23 23:46:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 4625 transitions. [2024-11-23 23:46:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-23 23:46:03,794 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:03,795 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 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 23:46:03,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-23 23:46:03,796 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:03,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1125808731, now seen corresponding path program 1 times [2024-11-23 23:46:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:03,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333304220] [2024-11-23 23:46:03,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:03,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-23 23:46:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:04,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333304220] [2024-11-23 23:46:04,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333304220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936229846] [2024-11-23 23:46:04,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:04,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:04,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:04,205 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:04,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-23 23:46:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:04,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 23:46:04,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 23:46:04,804 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:04,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936229846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:04,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:04,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-23 23:46:04,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496399191] [2024-11-23 23:46:04,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:04,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:46:04,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:04,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:46:04,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:46:04,806 INFO L87 Difference]: Start difference. First operand 2828 states and 4625 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2024-11-23 23:46:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:07,201 INFO L93 Difference]: Finished difference Result 5916 states and 9694 transitions. [2024-11-23 23:46:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:46:07,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 162 [2024-11-23 23:46:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:07,222 INFO L225 Difference]: With dead ends: 5916 [2024-11-23 23:46:07,222 INFO L226 Difference]: Without dead ends: 3161 [2024-11-23 23:46:07,231 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:46:07,232 INFO L435 NwaCegarLoop]: 460 mSDtfsCounter, 2336 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2458 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:07,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2458 Valid, 1059 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-23 23:46:07,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2024-11-23 23:46:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2931. [2024-11-23 23:46:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2286 states have (on average 1.615048118985127) internal successors, (3692), 2341 states have internal predecessors, (3692), 503 states have call successors, (503), 132 states have call predecessors, (503), 141 states have return successors, (578), 480 states have call predecessors, (578), 497 states have call successors, (578) [2024-11-23 23:46:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 4773 transitions. [2024-11-23 23:46:07,391 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 4773 transitions. Word has length 162 [2024-11-23 23:46:07,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:07,392 INFO L471 AbstractCegarLoop]: Abstraction has 2931 states and 4773 transitions. [2024-11-23 23:46:07,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 6 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2024-11-23 23:46:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 4773 transitions. [2024-11-23 23:46:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-23 23:46:07,396 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:07,396 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 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 23:46:07,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-23 23:46:07,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-23 23:46:07,597 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:07,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash -393841305, now seen corresponding path program 1 times [2024-11-23 23:46:07,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:07,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848699690] [2024-11-23 23:46:07,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-23 23:46:08,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:08,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848699690] [2024-11-23 23:46:08,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848699690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:08,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868827130] [2024-11-23 23:46:08,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:08,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:08,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:08,018 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:08,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-23 23:46:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:08,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 23:46:08,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:46:08,614 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:08,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868827130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:08,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:08,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-23 23:46:08,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699443876] [2024-11-23 23:46:08,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:08,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:46:08,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:08,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:46:08,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:46:08,615 INFO L87 Difference]: Start difference. First operand 2931 states and 4773 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2024-11-23 23:46:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:13,933 INFO L93 Difference]: Finished difference Result 12669 states and 20997 transitions. [2024-11-23 23:46:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-23 23:46:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) Word has length 162 [2024-11-23 23:46:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:13,986 INFO L225 Difference]: With dead ends: 12669 [2024-11-23 23:46:13,986 INFO L226 Difference]: Without dead ends: 9810 [2024-11-23 23:46:14,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-11-23 23:46:14,003 INFO L435 NwaCegarLoop]: 587 mSDtfsCounter, 3379 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 6969 mSolverCounterSat, 791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3493 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 7760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 6969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:14,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3493 Valid, 2218 Invalid, 7760 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [791 Valid, 6969 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-23 23:46:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2024-11-23 23:46:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 8991. [2024-11-23 23:46:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8991 states, 6952 states have (on average 1.6042865362485617) internal successors, (11153), 7130 states have internal predecessors, (11153), 1588 states have call successors, (1588), 374 states have call predecessors, (1588), 450 states have return successors, (2069), 1554 states have call predecessors, (2069), 1578 states have call successors, (2069) [2024-11-23 23:46:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8991 states to 8991 states and 14810 transitions. [2024-11-23 23:46:14,610 INFO L78 Accepts]: Start accepts. Automaton has 8991 states and 14810 transitions. Word has length 162 [2024-11-23 23:46:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:14,612 INFO L471 AbstractCegarLoop]: Abstraction has 8991 states and 14810 transitions. [2024-11-23 23:46:14,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 4 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 5 states have call predecessors, (17), 4 states have call successors, (17) [2024-11-23 23:46:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 8991 states and 14810 transitions. [2024-11-23 23:46:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-23 23:46:14,617 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:14,617 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:14,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-23 23:46:14,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-23 23:46:14,818 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:14,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:14,819 INFO L85 PathProgramCache]: Analyzing trace with hash -670974663, now seen corresponding path program 1 times [2024-11-23 23:46:14,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:14,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496180247] [2024-11-23 23:46:14,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-23 23:46:15,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:15,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496180247] [2024-11-23 23:46:15,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496180247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:15,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238726000] [2024-11-23 23:46:15,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:15,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:15,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:15,263 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:15,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-23 23:46:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:15,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-23 23:46:15,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:46:15,675 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:15,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238726000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:15,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:15,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2024-11-23 23:46:15,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810229743] [2024-11-23 23:46:15,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:15,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:46:15,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:15,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:46:15,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:46:15,678 INFO L87 Difference]: Start difference. First operand 8991 states and 14810 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:46:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:16,399 INFO L93 Difference]: Finished difference Result 21028 states and 34929 transitions. [2024-11-23 23:46:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:46:16,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 167 [2024-11-23 23:46:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:16,485 INFO L225 Difference]: With dead ends: 21028 [2024-11-23 23:46:16,485 INFO L226 Difference]: Without dead ends: 12113 [2024-11-23 23:46:16,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:46:16,541 INFO L435 NwaCegarLoop]: 1881 mSDtfsCounter, 987 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 2893 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:16,541 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 2893 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:46:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12113 states. [2024-11-23 23:46:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12113 to 8982. [2024-11-23 23:46:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8982 states, 6946 states have (on average 1.60394471638353) internal successors, (11141), 7121 states have internal predecessors, (11141), 1588 states have call successors, (1588), 374 states have call predecessors, (1588), 447 states have return successors, (2039), 1554 states have call predecessors, (2039), 1578 states have call successors, (2039) [2024-11-23 23:46:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8982 states to 8982 states and 14768 transitions. [2024-11-23 23:46:17,476 INFO L78 Accepts]: Start accepts. Automaton has 8982 states and 14768 transitions. Word has length 167 [2024-11-23 23:46:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:17,476 INFO L471 AbstractCegarLoop]: Abstraction has 8982 states and 14768 transitions. [2024-11-23 23:46:17,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:46:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 8982 states and 14768 transitions. [2024-11-23 23:46:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-23 23:46:17,481 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:17,481 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:17,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-23 23:46:17,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-23 23:46:17,682 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:17,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:17,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1380009335, now seen corresponding path program 1 times [2024-11-23 23:46:17,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:17,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137718100] [2024-11-23 23:46:17,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:17,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-23 23:46:18,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:18,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137718100] [2024-11-23 23:46:18,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137718100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:18,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722206149] [2024-11-23 23:46:18,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:18,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:18,129 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:18,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-23 23:46:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:18,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:46:18,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:46:18,667 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:18,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722206149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:18,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:18,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-23 23:46:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472936391] [2024-11-23 23:46:18,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:18,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:46:18,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:18,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:46:18,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:46:18,669 INFO L87 Difference]: Start difference. First operand 8982 states and 14768 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:46:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:19,582 INFO L93 Difference]: Finished difference Result 12115 states and 20106 transitions. [2024-11-23 23:46:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:46:19,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 167 [2024-11-23 23:46:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:19,673 INFO L225 Difference]: With dead ends: 12115 [2024-11-23 23:46:19,673 INFO L226 Difference]: Without dead ends: 12112 [2024-11-23 23:46:19,684 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:46:19,685 INFO L435 NwaCegarLoop]: 1880 mSDtfsCounter, 958 mSDsluCounter, 6421 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 8301 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:19,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 8301 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 23:46:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12112 states. [2024-11-23 23:46:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12112 to 12083. [2024-11-23 23:46:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12083 states, 9361 states have (on average 1.6032475162909945) internal successors, (15008), 9582 states have internal predecessors, (15008), 2127 states have call successors, (2127), 497 states have call predecessors, (2127), 594 states have return successors, (2867), 2093 states have call predecessors, (2867), 2113 states have call successors, (2867) [2024-11-23 23:46:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12083 states to 12083 states and 20002 transitions. [2024-11-23 23:46:20,619 INFO L78 Accepts]: Start accepts. Automaton has 12083 states and 20002 transitions. Word has length 167 [2024-11-23 23:46:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:20,622 INFO L471 AbstractCegarLoop]: Abstraction has 12083 states and 20002 transitions. [2024-11-23 23:46:20,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:46:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 12083 states and 20002 transitions. [2024-11-23 23:46:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-23 23:46:20,626 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:20,626 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:20,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-23 23:46:20,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:20,827 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:20,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1514980165, now seen corresponding path program 1 times [2024-11-23 23:46:20,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:20,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208295039] [2024-11-23 23:46:20,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-23 23:46:21,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:21,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208295039] [2024-11-23 23:46:21,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208295039] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:21,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562082838] [2024-11-23 23:46:21,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:21,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:21,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:21,301 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:21,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-23 23:46:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:21,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:46:21,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-23 23:46:21,728 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:21,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562082838] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:21,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:21,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-23 23:46:21,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934813958] [2024-11-23 23:46:21,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:21,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:46:21,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:21,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:46:21,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:46:21,730 INFO L87 Difference]: Start difference. First operand 12083 states and 20002 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:46:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:22,316 INFO L93 Difference]: Finished difference Result 24240 states and 40874 transitions. [2024-11-23 23:46:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:46:22,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 167 [2024-11-23 23:46:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:22,385 INFO L225 Difference]: With dead ends: 24240 [2024-11-23 23:46:22,385 INFO L226 Difference]: Without dead ends: 12227 [2024-11-23 23:46:22,454 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:46:22,454 INFO L435 NwaCegarLoop]: 1014 mSDtfsCounter, 25 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3009 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:22,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3009 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 23:46:22,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12227 states. [2024-11-23 23:46:23,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12227 to 12227. [2024-11-23 23:46:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12227 states, 9481 states have (on average 1.5981436557325177) internal successors, (15152), 9702 states have internal predecessors, (15152), 2127 states have call successors, (2127), 521 states have call predecessors, (2127), 618 states have return successors, (2867), 2093 states have call predecessors, (2867), 2113 states have call successors, (2867) [2024-11-23 23:46:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12227 states to 12227 states and 20146 transitions. [2024-11-23 23:46:23,844 INFO L78 Accepts]: Start accepts. Automaton has 12227 states and 20146 transitions. Word has length 167 [2024-11-23 23:46:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:23,845 INFO L471 AbstractCegarLoop]: Abstraction has 12227 states and 20146 transitions. [2024-11-23 23:46:23,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-23 23:46:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 12227 states and 20146 transitions. [2024-11-23 23:46:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2024-11-23 23:46:23,849 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:23,849 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:23,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-23 23:46:24,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:24,050 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:24,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash -441685382, now seen corresponding path program 1 times [2024-11-23 23:46:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:24,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679281571] [2024-11-23 23:46:24,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:24,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-23 23:46:24,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:24,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679281571] [2024-11-23 23:46:24,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679281571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:24,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346876333] [2024-11-23 23:46:24,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:24,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:24,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:24,421 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:24,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-23 23:46:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:24,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:46:24,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-23 23:46:25,017 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:25,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346876333] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:25,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:25,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-23 23:46:25,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140106202] [2024-11-23 23:46:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:25,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:46:25,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:25,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:46:25,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:46:25,019 INFO L87 Difference]: Start difference. First operand 12227 states and 20146 transitions. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-23 23:46:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:31,192 INFO L93 Difference]: Finished difference Result 39972 states and 67684 transitions. [2024-11-23 23:46:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:46:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 168 [2024-11-23 23:46:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:31,355 INFO L225 Difference]: With dead ends: 39972 [2024-11-23 23:46:31,355 INFO L226 Difference]: Without dead ends: 27811 [2024-11-23 23:46:31,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-23 23:46:31,451 INFO L435 NwaCegarLoop]: 503 mSDtfsCounter, 3442 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 5984 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3556 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 6822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 5984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:31,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3556 Valid, 1840 Invalid, 6822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 5984 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-23 23:46:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27811 states. [2024-11-23 23:46:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27811 to 26838. [2024-11-23 23:46:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26838 states, 20821 states have (on average 1.5906056385380145) internal successors, (33118), 21289 states have internal predecessors, (33118), 4595 states have call successors, (4595), 1240 states have call predecessors, (4595), 1421 states have return successors, (6804), 4495 states have call predecessors, (6804), 4567 states have call successors, (6804) [2024-11-23 23:46:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26838 states to 26838 states and 44517 transitions. [2024-11-23 23:46:33,401 INFO L78 Accepts]: Start accepts. Automaton has 26838 states and 44517 transitions. Word has length 168 [2024-11-23 23:46:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:33,401 INFO L471 AbstractCegarLoop]: Abstraction has 26838 states and 44517 transitions. [2024-11-23 23:46:33,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-23 23:46:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 26838 states and 44517 transitions. [2024-11-23 23:46:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-23 23:46:33,406 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:33,406 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:33,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-23 23:46:33,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:33,607 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:33,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:33,608 INFO L85 PathProgramCache]: Analyzing trace with hash -638788991, now seen corresponding path program 1 times [2024-11-23 23:46:33,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:33,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683222987] [2024-11-23 23:46:33,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:33,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-23 23:46:33,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683222987] [2024-11-23 23:46:33,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683222987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942299214] [2024-11-23 23:46:33,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:33,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:33,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:33,975 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:34,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-23 23:46:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:34,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:46:34,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:46:34,696 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:34,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942299214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:34,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:34,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2024-11-23 23:46:34,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21912963] [2024-11-23 23:46:34,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:34,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:46:34,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:34,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:46:34,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:46:34,698 INFO L87 Difference]: Start difference. First operand 26838 states and 44517 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-23 23:46:37,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:37,273 INFO L93 Difference]: Finished difference Result 61474 states and 103754 transitions. [2024-11-23 23:46:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:46:37,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 169 [2024-11-23 23:46:37,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:37,486 INFO L225 Difference]: With dead ends: 61474 [2024-11-23 23:46:37,486 INFO L226 Difference]: Without dead ends: 34695 [2024-11-23 23:46:37,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:46:37,691 INFO L435 NwaCegarLoop]: 1413 mSDtfsCounter, 1764 mSDsluCounter, 4792 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1766 SdHoareTripleChecker+Valid, 6205 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:37,691 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1766 Valid, 6205 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 23:46:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34695 states. [2024-11-23 23:46:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34695 to 34514. [2024-11-23 23:46:39,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34514 states, 27290 states have (on average 1.5841333821912789) internal successors, (43231), 27831 states have internal predecessors, (43231), 5176 states have call successors, (5176), 1760 states have call predecessors, (5176), 2047 states have return successors, (10041), 5109 states have call predecessors, (10041), 5128 states have call successors, (10041) [2024-11-23 23:46:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34514 states to 34514 states and 58448 transitions. [2024-11-23 23:46:40,077 INFO L78 Accepts]: Start accepts. Automaton has 34514 states and 58448 transitions. Word has length 169 [2024-11-23 23:46:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:40,077 INFO L471 AbstractCegarLoop]: Abstraction has 34514 states and 58448 transitions. [2024-11-23 23:46:40,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 3 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2024-11-23 23:46:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 34514 states and 58448 transitions. [2024-11-23 23:46:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-23 23:46:40,080 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:40,080 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:40,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-23 23:46:40,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-23 23:46:40,280 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:40,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1937552060, now seen corresponding path program 1 times [2024-11-23 23:46:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:40,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746602207] [2024-11-23 23:46:40,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-23 23:46:40,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:40,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746602207] [2024-11-23 23:46:40,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746602207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:40,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758663217] [2024-11-23 23:46:40,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:40,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:40,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:40,646 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:40,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-23 23:46:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:41,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:46:41,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-23 23:46:41,229 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:41,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758663217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:41,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:41,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-23 23:46:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507875299] [2024-11-23 23:46:41,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:41,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:46:41,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:41,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:46:41,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:46:41,230 INFO L87 Difference]: Start difference. First operand 34514 states and 58448 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-23 23:46:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:46:47,887 INFO L93 Difference]: Finished difference Result 66453 states and 112495 transitions. [2024-11-23 23:46:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:46:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 171 [2024-11-23 23:46:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:46:48,042 INFO L225 Difference]: With dead ends: 66453 [2024-11-23 23:46:48,042 INFO L226 Difference]: Without dead ends: 35855 [2024-11-23 23:46:48,182 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-23 23:46:48,183 INFO L435 NwaCegarLoop]: 532 mSDtfsCounter, 3322 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 6196 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3436 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 7018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 6196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:46:48,183 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3436 Valid, 1685 Invalid, 7018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 6196 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-23 23:46:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35855 states. [2024-11-23 23:46:50,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35855 to 34496. [2024-11-23 23:46:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34496 states, 27272 states have (on average 1.583198885303608) internal successors, (43177), 27813 states have internal predecessors, (43177), 5176 states have call successors, (5176), 1760 states have call predecessors, (5176), 2047 states have return successors, (10041), 5109 states have call predecessors, (10041), 5128 states have call successors, (10041) [2024-11-23 23:46:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34496 states to 34496 states and 58394 transitions. [2024-11-23 23:46:50,754 INFO L78 Accepts]: Start accepts. Automaton has 34496 states and 58394 transitions. Word has length 171 [2024-11-23 23:46:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:46:50,754 INFO L471 AbstractCegarLoop]: Abstraction has 34496 states and 58394 transitions. [2024-11-23 23:46:50,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-23 23:46:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 34496 states and 58394 transitions. [2024-11-23 23:46:50,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-23 23:46:50,758 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:46:50,758 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:46:50,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-23 23:46:50,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-23 23:46:50,959 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:46:50,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:46:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash -386647010, now seen corresponding path program 1 times [2024-11-23 23:46:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:46:50,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550381322] [2024-11-23 23:46:50,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:50,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:46:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-23 23:46:51,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:46:51,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550381322] [2024-11-23 23:46:51,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550381322] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:46:51,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681030953] [2024-11-23 23:46:51,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:46:51,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:46:51,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:46:51,485 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:46:51,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-23 23:46:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:46:51,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:46:51,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:46:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-23 23:46:52,169 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:46:52,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681030953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:46:52,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:46:52,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-11-23 23:46:52,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629357830] [2024-11-23 23:46:52,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:46:52,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:46:52,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:46:52,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:46:52,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:46:52,171 INFO L87 Difference]: Start difference. First operand 34496 states and 58394 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-23 23:47:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:47:00,428 INFO L93 Difference]: Finished difference Result 104258 states and 192450 transitions. [2024-11-23 23:47:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:47:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 172 [2024-11-23 23:47:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:47:01,046 INFO L225 Difference]: With dead ends: 104258 [2024-11-23 23:47:01,046 INFO L226 Difference]: Without dead ends: 69809 [2024-11-23 23:47:01,452 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:47:01,453 INFO L435 NwaCegarLoop]: 334 mSDtfsCounter, 3674 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 3493 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3784 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 4442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 3493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:47:01,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3784 Valid, 1243 Invalid, 4442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 3493 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-23 23:47:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69809 states. [2024-11-23 23:47:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69809 to 59404. [2024-11-23 23:47:05,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59404 states, 46900 states have (on average 1.5630703624733475) internal successors, (73308), 47917 states have internal predecessors, (73308), 8888 states have call successors, (8888), 3061 states have call predecessors, (8888), 3615 states have return successors, (17355), 8766 states have call predecessors, (17355), 8835 states have call successors, (17355) [2024-11-23 23:47:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59404 states to 59404 states and 99551 transitions. [2024-11-23 23:47:05,976 INFO L78 Accepts]: Start accepts. Automaton has 59404 states and 99551 transitions. Word has length 172 [2024-11-23 23:47:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:47:05,977 INFO L471 AbstractCegarLoop]: Abstraction has 59404 states and 99551 transitions. [2024-11-23 23:47:05,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-23 23:47:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 59404 states and 99551 transitions. [2024-11-23 23:47:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-11-23 23:47:05,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:47:05,981 INFO L218 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:47:05,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-23 23:47:06,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-23 23:47:06,182 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 23:47:06,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:47:06,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1179899494, now seen corresponding path program 1 times [2024-11-23 23:47:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:47:06,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781655668] [2024-11-23 23:47:06,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:47:06,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:47:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:47:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-23 23:47:06,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:47:06,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781655668] [2024-11-23 23:47:06,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781655668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:47:06,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304559689] [2024-11-23 23:47:06,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:47:06,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:47:06,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:47:06,466 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:47:06,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f886f48d-11af-40e3-a512-dca17b8137ec/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-23 23:47:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:47:06,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:47:06,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:47:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 23:47:06,923 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:47:06,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304559689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:47:06,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:47:06,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2024-11-23 23:47:06,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506064732] [2024-11-23 23:47:06,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:47:06,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:47:06,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:47:06,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:47:06,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:47:06,925 INFO L87 Difference]: Start difference. First operand 59404 states and 99551 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18)