./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --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_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/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_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/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_5e6c3c34-eca4-4062-ac90-5c201b970794/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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 22:35:55,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 22:35:55,987 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 22:35:55,994 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 22:35:55,994 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 22:35:56,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 22:35:56,053 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 22:35:56,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 22:35:56,055 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 22:35:56,055 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 22:35:56,056 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 22:35:56,056 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 22:35:56,057 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 22:35:56,057 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 22:35:56,057 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 22:35:56,057 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 22:35:56,057 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 22:35:56,057 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 22:35:56,058 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 22:35:56,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 22:35:56,058 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 22:35:56,058 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 22:35:56,058 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 22:35:56,058 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 22:35:56,058 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 22:35:56,058 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 22:35:56,059 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 22:35:56,059 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 22:35:56,060 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 22:35:56,060 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:35:56,060 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:35:56,060 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:35:56,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:35:56,061 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 22:35:56,061 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:35:56,061 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:35:56,061 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:35:56,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:35:56,061 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 22:35:56,061 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 22:35:56,061 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 22:35:56,062 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 22:35:56,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 22:35:56,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 22:35:56,062 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 22:35:56,062 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 22:35:56,062 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 22:35:56,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 22:35:56,063 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_5e6c3c34-eca4-4062-ac90-5c201b970794/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 -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2024-11-23 22:35:56,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 22:35:56,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 22:35:56,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 22:35:56,453 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 22:35:56,453 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 22:35:56,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-23 22:35:59,886 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/data/47ba7ae7e/350fd684690f419fb0e175f559a4a0ce/FLAG08457c09f [2024-11-23 22:36:00,203 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 22:36:00,204 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-23 22:36:00,217 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/data/47ba7ae7e/350fd684690f419fb0e175f559a4a0ce/FLAG08457c09f [2024-11-23 22:36:00,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/data/47ba7ae7e/350fd684690f419fb0e175f559a4a0ce [2024-11-23 22:36:00,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 22:36:00,252 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 22:36:00,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 22:36:00,255 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 22:36:00,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 22:36:00,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,264 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29dc517e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00, skipping insertion in model container [2024-11-23 22:36:00,264 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,290 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 22:36:00,455 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_5e6c3c34-eca4-4062-ac90-5c201b970794/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-23 22:36:00,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:36:00,495 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 22:36:00,508 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_5e6c3c34-eca4-4062-ac90-5c201b970794/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-23 22:36:00,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:36:00,551 INFO L204 MainTranslator]: Completed translation [2024-11-23 22:36:00,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00 WrapperNode [2024-11-23 22:36:00,552 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 22:36:00,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 22:36:00,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 22:36:00,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 22:36:00,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,580 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,606 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 108 [2024-11-23 22:36:00,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 22:36:00,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 22:36:00,608 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 22:36:00,609 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 22:36:00,616 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,618 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,638 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-23 22:36:00,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,642 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,651 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,666 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 22:36:00,672 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 22:36:00,672 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 22:36:00,672 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 22:36:00,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (1/1) ... [2024-11-23 22:36:00,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:36:00,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:00,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 22:36:00,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 22:36:00,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 22:36:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 22:36:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 22:36:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 22:36:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 22:36:00,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 22:36:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 22:36:00,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 22:36:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 22:36:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 22:36:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-23 22:36:00,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-23 22:36:00,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 22:36:00,826 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 22:36:00,828 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 22:36:01,028 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-23 22:36:01,028 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 22:36:01,040 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 22:36:01,040 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-23 22:36:01,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:36:01 BoogieIcfgContainer [2024-11-23 22:36:01,041 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 22:36:01,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 22:36:01,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 22:36:01,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 22:36:01,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:36:00" (1/3) ... [2024-11-23 22:36:01,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1518ed16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:36:01, skipping insertion in model container [2024-11-23 22:36:01,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:36:00" (2/3) ... [2024-11-23 22:36:01,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1518ed16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:36:01, skipping insertion in model container [2024-11-23 22:36:01,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:36:01" (3/3) ... [2024-11-23 22:36:01,052 INFO L128 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2024-11-23 22:36:01,068 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 22:36:01,070 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_selectionsort_2_ground.i that has 2 procedures, 44 locations, 1 initial locations, 8 loop locations, and 1 error locations. [2024-11-23 22:36:01,128 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:36:01,147 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;@29184239, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:36:01,147 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-23 22:36:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 39 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-23 22:36:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-23 22:36:01,160 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:01,161 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:01,162 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:01,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1094504294, now seen corresponding path program 1 times [2024-11-23 22:36:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:01,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785943149] [2024-11-23 22:36:01,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:36:01,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:01,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785943149] [2024-11-23 22:36:01,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785943149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:36:01,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:36:01,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:36:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637144299] [2024-11-23 22:36:01,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:36:01,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:36:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:01,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:36:01,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:36:01,438 INFO L87 Difference]: Start difference. First operand has 44 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 39 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:01,617 INFO L93 Difference]: Finished difference Result 107 states and 166 transitions. [2024-11-23 22:36:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:36:01,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-23 22:36:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:01,626 INFO L225 Difference]: With dead ends: 107 [2024-11-23 22:36:01,627 INFO L226 Difference]: Without dead ends: 63 [2024-11-23 22:36:01,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:36:01,633 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:01,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 79 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:36:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-23 22:36:01,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2024-11-23 22:36:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-23 22:36:01,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-11-23 22:36:01,686 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 14 [2024-11-23 22:36:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:01,686 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-11-23 22:36:01,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-11-23 22:36:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-23 22:36:01,688 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:01,688 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:01,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 22:36:01,689 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:01,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:01,689 INFO L85 PathProgramCache]: Analyzing trace with hash 450283988, now seen corresponding path program 1 times [2024-11-23 22:36:01,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:01,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188707844] [2024-11-23 22:36:01,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:01,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:36:01,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:01,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188707844] [2024-11-23 22:36:01,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188707844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:01,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583700909] [2024-11-23 22:36:01,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:01,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:01,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:36:01,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 22:36:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:01,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 22:36:01,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:36:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:36:02,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:36:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:36:02,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583700909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:36:02,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:36:02,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-23 22:36:02,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140422479] [2024-11-23 22:36:02,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:36:02,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 22:36:02,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:02,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 22:36:02,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:36:02,069 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:02,295 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2024-11-23 22:36:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:36:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-23 22:36:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:02,298 INFO L225 Difference]: With dead ends: 148 [2024-11-23 22:36:02,298 INFO L226 Difference]: Without dead ends: 111 [2024-11-23 22:36:02,299 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:36:02,300 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 192 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:02,300 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 114 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:36:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-23 22:36:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-23 22:36:02,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 100 states have (on average 1.28) internal successors, (128), 100 states have internal predecessors, (128), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-23 22:36:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 146 transitions. [2024-11-23 22:36:02,324 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 146 transitions. Word has length 19 [2024-11-23 22:36:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:02,324 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 146 transitions. [2024-11-23 22:36:02,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:02,324 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 146 transitions. [2024-11-23 22:36:02,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-23 22:36:02,325 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:02,325 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:02,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 22:36:02,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:02,532 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:02,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:02,532 INFO L85 PathProgramCache]: Analyzing trace with hash 675711368, now seen corresponding path program 2 times [2024-11-23 22:36:02,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:02,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587018784] [2024-11-23 22:36:02,533 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:36:02,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:02,561 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:36:02,561 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 22:36:02,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:02,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587018784] [2024-11-23 22:36:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587018784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:36:02,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:36:02,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:36:02,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267099689] [2024-11-23 22:36:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:36:02,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:36:02,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:02,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:36:02,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:36:02,631 INFO L87 Difference]: Start difference. First operand 111 states and 146 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:02,751 INFO L93 Difference]: Finished difference Result 208 states and 277 transitions. [2024-11-23 22:36:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:36:02,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-23 22:36:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:02,754 INFO L225 Difference]: With dead ends: 208 [2024-11-23 22:36:02,754 INFO L226 Difference]: Without dead ends: 115 [2024-11-23 22:36:02,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 22:36:02,756 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:02,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 100 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:36:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-23 22:36:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2024-11-23 22:36:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.2772277227722773) internal successors, (129), 101 states have internal predecessors, (129), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-23 22:36:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2024-11-23 22:36:02,781 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 25 [2024-11-23 22:36:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:02,781 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2024-11-23 22:36:02,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2024-11-23 22:36:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-23 22:36:02,782 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:02,782 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:02,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 22:36:02,783 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:02,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:02,787 INFO L85 PathProgramCache]: Analyzing trace with hash 127219488, now seen corresponding path program 1 times [2024-11-23 22:36:02,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:02,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755248482] [2024-11-23 22:36:02,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:02,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-23 22:36:03,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:03,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755248482] [2024-11-23 22:36:03,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755248482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:03,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871553841] [2024-11-23 22:36:03,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:03,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:03,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:03,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:36:03,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 22:36:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:03,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 22:36:03,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:36:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:36:03,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:36:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:36:03,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871553841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:36:03,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:36:03,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-23 22:36:03,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027956327] [2024-11-23 22:36:03,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:36:03,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 22:36:03,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:03,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 22:36:03,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2024-11-23 22:36:03,310 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:03,775 INFO L93 Difference]: Finished difference Result 362 states and 496 transitions. [2024-11-23 22:36:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 22:36:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-23 22:36:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:03,778 INFO L225 Difference]: With dead ends: 362 [2024-11-23 22:36:03,778 INFO L226 Difference]: Without dead ends: 261 [2024-11-23 22:36:03,779 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2024-11-23 22:36:03,784 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 507 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:03,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 287 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 22:36:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-23 22:36:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 255. [2024-11-23 22:36:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 232 states have (on average 1.2801724137931034) internal successors, (297), 232 states have internal predecessors, (297), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-23 22:36:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 339 transitions. [2024-11-23 22:36:03,831 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 339 transitions. Word has length 29 [2024-11-23 22:36:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:03,831 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 339 transitions. [2024-11-23 22:36:03,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 339 transitions. [2024-11-23 22:36:03,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-23 22:36:03,834 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:03,834 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:03,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 22:36:04,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:04,034 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:04,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:04,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1518758688, now seen corresponding path program 2 times [2024-11-23 22:36:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:04,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953415593] [2024-11-23 22:36:04,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:36:04,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:04,070 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:36:04,074 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-23 22:36:04,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:04,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953415593] [2024-11-23 22:36:04,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953415593] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:36:04,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:36:04,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:36:04,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932914962] [2024-11-23 22:36:04,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:36:04,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:36:04,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:04,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:36:04,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:36:04,152 INFO L87 Difference]: Start difference. First operand 255 states and 339 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:04,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:04,257 INFO L93 Difference]: Finished difference Result 467 states and 628 transitions. [2024-11-23 22:36:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:36:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-23 22:36:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:04,260 INFO L225 Difference]: With dead ends: 467 [2024-11-23 22:36:04,261 INFO L226 Difference]: Without dead ends: 249 [2024-11-23 22:36:04,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:36:04,263 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:04,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:36:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-23 22:36:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2024-11-23 22:36:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.277533039647577) internal successors, (290), 227 states have internal predecessors, (290), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-23 22:36:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 330 transitions. [2024-11-23 22:36:04,308 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 330 transitions. Word has length 45 [2024-11-23 22:36:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:04,308 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 330 transitions. [2024-11-23 22:36:04,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 330 transitions. [2024-11-23 22:36:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-23 22:36:04,309 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:04,310 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:04,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 22:36:04,311 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:04,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1870729520, now seen corresponding path program 1 times [2024-11-23 22:36:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:04,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189090286] [2024-11-23 22:36:04,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:04,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:04,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:04,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189090286] [2024-11-23 22:36:04,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189090286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:04,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795352389] [2024-11-23 22:36:04,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:04,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:04,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:04,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:36:04,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 22:36:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:04,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 22:36:04,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:36:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:05,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:36:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:05,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795352389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:36:05,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:36:05,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-23 22:36:05,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533562838] [2024-11-23 22:36:05,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:36:05,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 22:36:05,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:05,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 22:36:05,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-23 22:36:05,444 INFO L87 Difference]: Start difference. First operand 249 states and 330 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:06,420 INFO L93 Difference]: Finished difference Result 751 states and 1032 transitions. [2024-11-23 22:36:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 22:36:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-23 22:36:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:06,425 INFO L225 Difference]: With dead ends: 751 [2024-11-23 22:36:06,425 INFO L226 Difference]: Without dead ends: 525 [2024-11-23 22:36:06,427 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-23 22:36:06,428 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 1239 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:06,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 445 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-23 22:36:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2024-11-23 22:36:06,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2024-11-23 22:36:06,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 479 states have (on average 1.2818371607515657) internal successors, (614), 479 states have internal predecessors, (614), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-23 22:36:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 702 transitions. [2024-11-23 22:36:06,495 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 702 transitions. Word has length 45 [2024-11-23 22:36:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:06,495 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 702 transitions. [2024-11-23 22:36:06,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 702 transitions. [2024-11-23 22:36:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-23 22:36:06,499 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:06,499 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:06,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 22:36:06,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:06,700 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:06,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:06,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1736450560, now seen corresponding path program 2 times [2024-11-23 22:36:06,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:06,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957818030] [2024-11-23 22:36:06,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:36:06,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:06,758 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:36:06,758 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:07,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:07,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957818030] [2024-11-23 22:36:07,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957818030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:07,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030038082] [2024-11-23 22:36:07,722 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:36:07,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:07,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:07,725 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:36:07,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 22:36:07,872 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:36:07,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:07,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 22:36:07,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:36:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:08,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:36:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:09,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030038082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:36:09,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:36:09,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-23 22:36:09,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184222426] [2024-11-23 22:36:09,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:36:09,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-23 22:36:09,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:09,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-23 22:36:09,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-23 22:36:09,195 INFO L87 Difference]: Start difference. First operand 525 states and 702 transitions. Second operand has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:11,431 INFO L93 Difference]: Finished difference Result 1555 states and 2148 transitions. [2024-11-23 22:36:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-23 22:36:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-23 22:36:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:11,439 INFO L225 Difference]: With dead ends: 1555 [2024-11-23 22:36:11,442 INFO L226 Difference]: Without dead ends: 1077 [2024-11-23 22:36:11,445 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-23 22:36:11,449 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 3382 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:11,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3473 Valid, 819 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-23 22:36:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2024-11-23 22:36:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1077. [2024-11-23 22:36:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 983 states have (on average 1.28382502543235) internal successors, (1262), 983 states have internal predecessors, (1262), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-23 22:36:11,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1446 transitions. [2024-11-23 22:36:11,525 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1446 transitions. Word has length 69 [2024-11-23 22:36:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:11,527 INFO L471 AbstractCegarLoop]: Abstraction has 1077 states and 1446 transitions. [2024-11-23 22:36:11,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1446 transitions. [2024-11-23 22:36:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-23 22:36:11,529 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:11,529 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:11,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 22:36:11,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:11,735 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:11,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash 368702368, now seen corresponding path program 3 times [2024-11-23 22:36:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:11,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400982772] [2024-11-23 22:36:11,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:36:11,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:11,784 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 22:36:11,786 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2024-11-23 22:36:11,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:11,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400982772] [2024-11-23 22:36:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400982772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486436681] [2024-11-23 22:36:11,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:36:11,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:11,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:11,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:36:11,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 22:36:11,973 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-23 22:36:11,973 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:11,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 22:36:11,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:36:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2024-11-23 22:36:12,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:36:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2024-11-23 22:36:12,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486436681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:36:12,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:36:12,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-23 22:36:12,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529674945] [2024-11-23 22:36:12,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:36:12,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 22:36:12,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:12,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 22:36:12,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-23 22:36:12,057 INFO L87 Difference]: Start difference. First operand 1077 states and 1446 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:12,285 INFO L93 Difference]: Finished difference Result 2071 states and 2817 transitions. [2024-11-23 22:36:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 22:36:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2024-11-23 22:36:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:12,292 INFO L225 Difference]: With dead ends: 2071 [2024-11-23 22:36:12,292 INFO L226 Difference]: Without dead ends: 1101 [2024-11-23 22:36:12,295 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2024-11-23 22:36:12,295 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:12,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 137 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:36:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-11-23 22:36:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1101. [2024-11-23 22:36:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1007 states have (on average 1.2830188679245282) internal successors, (1292), 1007 states have internal predecessors, (1292), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-23 22:36:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1476 transitions. [2024-11-23 22:36:12,377 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1476 transitions. Word has length 117 [2024-11-23 22:36:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:12,378 INFO L471 AbstractCegarLoop]: Abstraction has 1101 states and 1476 transitions. [2024-11-23 22:36:12,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:12,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1476 transitions. [2024-11-23 22:36:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-23 22:36:12,385 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:12,385 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:12,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 22:36:12,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:12,586 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:12,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1416605184, now seen corresponding path program 4 times [2024-11-23 22:36:12,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:12,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722982638] [2024-11-23 22:36:12,587 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:36:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:12,639 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:36:12,640 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 2148 trivial. 0 not checked. [2024-11-23 22:36:13,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:13,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722982638] [2024-11-23 22:36:13,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722982638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:13,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138433864] [2024-11-23 22:36:13,155 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:36:13,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:13,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:13,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:36:13,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 22:36:13,296 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:36:13,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:13,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 22:36:13,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:36:13,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 22:36:13,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2024-11-23 22:36:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 2148 trivial. 0 not checked. [2024-11-23 22:36:13,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:36:13,685 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2024-11-23 22:36:13,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 19 [2024-11-23 22:36:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 2148 trivial. 0 not checked. [2024-11-23 22:36:13,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138433864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:36:13,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:36:13,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-11-23 22:36:13,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477150939] [2024-11-23 22:36:13,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:36:13,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-23 22:36:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:13,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-23 22:36:13,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-23 22:36:13,735 INFO L87 Difference]: Start difference. First operand 1101 states and 1476 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:14,439 INFO L93 Difference]: Finished difference Result 2684 states and 3697 transitions. [2024-11-23 22:36:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-23 22:36:14,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2024-11-23 22:36:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:14,453 INFO L225 Difference]: With dead ends: 2684 [2024-11-23 22:36:14,453 INFO L226 Difference]: Without dead ends: 1688 [2024-11-23 22:36:14,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2024-11-23 22:36:14,459 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:14,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 310 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 22:36:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2024-11-23 22:36:14,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1409. [2024-11-23 22:36:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1315 states have (on average 1.3155893536121672) internal successors, (1730), 1315 states have internal predecessors, (1730), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-23 22:36:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1914 transitions. [2024-11-23 22:36:14,603 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1914 transitions. Word has length 133 [2024-11-23 22:36:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:14,603 INFO L471 AbstractCegarLoop]: Abstraction has 1409 states and 1914 transitions. [2024-11-23 22:36:14,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1914 transitions. [2024-11-23 22:36:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-23 22:36:14,607 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:14,608 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:14,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 22:36:14,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-23 22:36:14,812 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:14,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:14,813 INFO L85 PathProgramCache]: Analyzing trace with hash -30401790, now seen corresponding path program 1 times [2024-11-23 22:36:14,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:14,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459054523] [2024-11-23 22:36:14,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:14,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 22:36:17,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:17,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459054523] [2024-11-23 22:36:18,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459054523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:18,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104345230] [2024-11-23 22:36:18,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:36:18,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:18,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:18,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:36:18,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 22:36:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:18,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-23 22:36:18,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:36:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 22:36:18,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:36:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 22:36:22,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104345230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:36:22,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:36:22,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-23 22:36:22,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33719715] [2024-11-23 22:36:22,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:36:22,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-23 22:36:22,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:22,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-23 22:36:22,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-23 22:36:22,131 INFO L87 Difference]: Start difference. First operand 1409 states and 1914 transitions. Second operand has 97 states, 97 states have (on average 2.1649484536082473) internal successors, (210), 97 states have internal predecessors, (210), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:36:32,867 INFO L93 Difference]: Finished difference Result 4163 states and 5796 transitions. [2024-11-23 22:36:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-23 22:36:32,868 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1649484536082473) internal successors, (210), 97 states have internal predecessors, (210), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2024-11-23 22:36:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:36:32,881 INFO L225 Difference]: With dead ends: 4163 [2024-11-23 22:36:32,881 INFO L226 Difference]: Without dead ends: 2849 [2024-11-23 22:36:32,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-23 22:36:32,886 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 9551 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9738 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-23 22:36:32,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9738 Valid, 1568 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-23 22:36:32,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2024-11-23 22:36:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2849. [2024-11-23 22:36:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2659 states have (on average 1.3185408048138398) internal successors, (3506), 2659 states have internal predecessors, (3506), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2024-11-23 22:36:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 3882 transitions. [2024-11-23 22:36:33,025 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 3882 transitions. Word has length 133 [2024-11-23 22:36:33,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:36:33,026 INFO L471 AbstractCegarLoop]: Abstraction has 2849 states and 3882 transitions. [2024-11-23 22:36:33,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1649484536082473) internal successors, (210), 97 states have internal predecessors, (210), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 3882 transitions. [2024-11-23 22:36:33,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-23 22:36:33,028 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:36:33,028 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:33,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 22:36:33,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:33,233 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:36:33,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2128347582, now seen corresponding path program 2 times [2024-11-23 22:36:33,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:33,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265979310] [2024-11-23 22:36:33,235 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:36:33,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:33,394 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:36:33,395 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8902 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 22:36:41,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:41,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265979310] [2024-11-23 22:36:41,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265979310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21590923] [2024-11-23 22:36:41,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:36:41,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:41,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:41,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:36:41,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 22:36:42,021 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:36:42,021 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:42,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-23 22:36:42,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:36:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8902 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 22:36:42,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:36:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8902 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 22:36:53,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21590923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:36:53,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:36:53,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-11-23 22:36:53,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575604831] [2024-11-23 22:36:53,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:36:53,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-23 22:36:53,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:53,444 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-23 22:36:53,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-23 22:36:53,450 INFO L87 Difference]: Start difference. First operand 2849 states and 3882 transitions. Second operand has 193 states, 193 states have (on average 2.082901554404145) internal successors, (402), 193 states have internal predecessors, (402), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:13,897 INFO L93 Difference]: Finished difference Result 8387 states and 11700 transitions. [2024-11-23 22:38:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-23 22:38:13,898 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.082901554404145) internal successors, (402), 193 states have internal predecessors, (402), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2024-11-23 22:38:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:13,925 INFO L225 Difference]: With dead ends: 8387 [2024-11-23 22:38:13,925 INFO L226 Difference]: Without dead ends: 5729 [2024-11-23 22:38:13,934 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-23 22:38:13,937 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 26004 mSDsluCounter, 3002 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 1488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26383 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 4615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1488 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:13,937 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26383 Valid, 3052 Invalid, 4615 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1488 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-23 22:38:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5729 states. [2024-11-23 22:38:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5729 to 5729. [2024-11-23 22:38:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5729 states, 5347 states have (on average 1.3199925191696278) internal successors, (7058), 5347 states have internal predecessors, (7058), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2024-11-23 22:38:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 7818 transitions. [2024-11-23 22:38:14,197 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 7818 transitions. Word has length 229 [2024-11-23 22:38:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:14,197 INFO L471 AbstractCegarLoop]: Abstraction has 5729 states and 7818 transitions. [2024-11-23 22:38:14,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.082901554404145) internal successors, (402), 193 states have internal predecessors, (402), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 7818 transitions. [2024-11-23 22:38:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2024-11-23 22:38:14,205 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:14,205 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:14,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 22:38:14,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:14,406 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:38:14,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:14,407 INFO L85 PathProgramCache]: Analyzing trace with hash 298239170, now seen corresponding path program 3 times [2024-11-23 22:38:14,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:14,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742376428] [2024-11-23 22:38:14,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:38:14,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:14,596 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-23 22:38:14,600 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36166 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-23 22:38:14,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742376428] [2024-11-23 22:38:14,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742376428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775170133] [2024-11-23 22:38:14,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:38:14,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:14,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:14,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:14,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 22:38:15,252 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-23 22:38:15,252 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:15,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 22:38:15,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36166 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-23 22:38:15,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36166 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-23 22:38:15,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775170133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:15,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:15,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-11-23 22:38:15,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364380370] [2024-11-23 22:38:15,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:15,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 22:38:15,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:15,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 22:38:15,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-23 22:38:15,503 INFO L87 Difference]: Start difference. First operand 5729 states and 7818 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:16,216 INFO L93 Difference]: Finished difference Result 11095 states and 15290 transitions. [2024-11-23 22:38:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-23 22:38:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 421 [2024-11-23 22:38:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:16,248 INFO L225 Difference]: With dead ends: 11095 [2024-11-23 22:38:16,249 INFO L226 Difference]: Without dead ends: 5777 [2024-11-23 22:38:16,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 834 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=958, Unknown=0, NotChecked=0, Total=1482 [2024-11-23 22:38:16,262 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 257 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:16,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 189 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:38:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2024-11-23 22:38:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 5777. [2024-11-23 22:38:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5395 states have (on average 1.3193697868396663) internal successors, (7118), 5395 states have internal predecessors, (7118), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2024-11-23 22:38:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 7878 transitions. [2024-11-23 22:38:16,582 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 7878 transitions. Word has length 421 [2024-11-23 22:38:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:16,583 INFO L471 AbstractCegarLoop]: Abstraction has 5777 states and 7878 transitions. [2024-11-23 22:38:16,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 7878 transitions. [2024-11-23 22:38:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2024-11-23 22:38:16,590 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:16,590 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:16,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 22:38:16,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:16,791 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:38:16,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1756513918, now seen corresponding path program 4 times [2024-11-23 22:38:16,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:16,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787914468] [2024-11-23 22:38:16,792 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:38:16,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:16,977 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:38:16,977 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36478 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-23 22:38:18,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:38:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787914468] [2024-11-23 22:38:18,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787914468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:38:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573314682] [2024-11-23 22:38:18,289 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:38:18,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:38:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:38:18,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:38:18,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 22:38:18,928 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:38:18,928 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:38:18,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 22:38:18,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:38:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36478 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-23 22:38:19,080 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:38:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 36478 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-23 22:38:19,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573314682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:38:19,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:38:19,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2024-11-23 22:38:19,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603594672] [2024-11-23 22:38:19,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:38:19,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-23 22:38:19,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:38:19,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-23 22:38:19,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2024-11-23 22:38:19,607 INFO L87 Difference]: Start difference. First operand 5777 states and 7878 transitions. Second operand has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:20,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:38:20,983 INFO L93 Difference]: Finished difference Result 11207 states and 15442 transitions. [2024-11-23 22:38:20,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-23 22:38:20,984 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 453 [2024-11-23 22:38:20,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:38:21,009 INFO L225 Difference]: With dead ends: 11207 [2024-11-23 22:38:21,010 INFO L226 Difference]: Without dead ends: 5873 [2024-11-23 22:38:21,019 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2136, Invalid=4026, Unknown=0, NotChecked=0, Total=6162 [2024-11-23 22:38:21,020 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 405 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 22:38:21,020 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 186 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 22:38:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5873 states. [2024-11-23 22:38:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5873 to 5873. [2024-11-23 22:38:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5491 states have (on average 1.3181569841558916) internal successors, (7238), 5491 states have internal predecessors, (7238), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2024-11-23 22:38:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 7998 transitions. [2024-11-23 22:38:21,261 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 7998 transitions. Word has length 453 [2024-11-23 22:38:21,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:38:21,265 INFO L471 AbstractCegarLoop]: Abstraction has 5873 states and 7998 transitions. [2024-11-23 22:38:21,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:38:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 7998 transitions. [2024-11-23 22:38:21,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2024-11-23 22:38:21,280 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:38:21,280 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:38:21,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 22:38:21,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-23 22:38:21,482 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 22:38:21,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:38:21,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1454202110, now seen corresponding path program 5 times [2024-11-23 22:38:21,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:38:21,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069298188] [2024-11-23 22:38:21,483 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 22:38:21,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:38:33,693 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 191 check-sat command(s) [2024-11-23 22:38:33,693 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:39:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 37870 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2024-11-23 22:39:01,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:39:01,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069298188] [2024-11-23 22:39:01,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069298188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:39:01,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657162463] [2024-11-23 22:39:01,679 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 22:39:01,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:39:01,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:39:01,683 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:39:01,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e6c3c34-eca4-4062-ac90-5c201b970794/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process